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Extract from the Register of European Patents

EP About this file: EP3412434

EP3412434 - POLYMERIC MATERIALS [Right-click to bookmark this link]
StatusOpposition rejected
Status updated on  01.03.2024
Database last updated on 07.03.2026
FormerThe patent has been granted
Status updated on  03.04.2021
FormerGrant of patent is intended
Status updated on  23.11.2020
FormerExamination is in progress
Status updated on  11.12.2019
FormerRequest for examination was made
Status updated on  21.06.2019
FormerThe application has been published
Status updated on  09.11.2018
Most recent event   Tooltip13.09.2024Lapse of the patent in a contracting state
New state(s): MT		published on 16.10.2024  [2024/42]
Applicant(s)For all designated states
Victrex Manufacturing Limited
Victrex Technology Centre
Hillhouse International
Thornton
Cleveleys, Lancashire FY5 4QD / GB
[2018/50]
Inventor(s)01 / CHAPLIN, Adam
Victrex Manufacturing Limited
281 Blackpool Road
Poulton-Le-Fylde, Lancashire FY6 7QT / GB
02 / WOOD, Alan
Victrex Manufacturing Limited
Laurel House, Milburn
Penrith, Cumbria CA10 1TW / GB
03 / MATTHEWS, Alice Victoria Mary
Victrex Manufacturing Limited
151 Arundel Drive, Carlton
Poulton-Le-Fylde, Lancashire FY6 7TS / GB
 [2018/50]
Representative(s)Appleyard Lees IP LLP
G Mill
Dean Clough Industrial Park
Halifax HX3 5AH / GB
[N/P]
Former [2018/50]Wilkins, Georgina Mary Heather
Victrex Manufacturing Limited
Intellectual Property Department
Victrex Technology Centre
Hillhouse International
Thornton Cleveleys FY5 4QD / GB
Application number, filing date18180079.813.02.2015
[2018/50]
Priority number, dateGB2014000320124.02.2014         Original published format: GB 201403201
[2018/50]
Filing languageEN
Procedural languageEN
PublicationType: A1 Application with search report 
No.:EP3412434
Date:12.12.2018
Language:EN
[2018/50]
Type: B1 Patent specification 
No.:EP3412434
Date:05.05.2021
Language:EN
[2021/18]
Search report(s)(Supplementary) European search report - dispatched on:EP09.10.2018
ClassificationIPC:B29C67/00, C08G65/40, C08L71/00, B33Y70/00, B33Y10/00, B29C64/153, B29C64/35, B33Y30/00
[2018/50]
CPC:
B33Y70/10 (EP,GB,US); C08J9/232 (GB); B29C64/153 (EP,US);
B29C64/188 (EP); B29C64/357 (EP,US); B33Y10/00 (EP,US);
B33Y30/00 (US); C08G65/40 (GB); C08G65/4012 (EP,GB,US);
C08L71/00 (EP,US); B29C64/35 (EP,US); C08G2650/40 (EP,US) (-)
C-Set:
C08L71/00, C08L71/00 (EP,US)
Designated contracting statesAL,   AT,   BE,   BG,   CH,   CY,   CZ,   DE,   DK,   EE,   ES,   FI,   FR,   GB,   GR,   HR,   HU,   IE,   IS,   IT,   LI,   LT,   LU,   LV,   MC,   MK,   MT,   NL,   NO,   PL,   PT,   RO,   RS,   SE,   SI,   SK,   SM,   TR [2019/30]
Former [2018/50]AL,  AT,  BE,  BG,  CH,  CY,  CZ,  DE,  DK,  EE,  ES,  FI,  FR,  GB,  GR,  HR,  HU,  IE,  IS,  IT,  LI,  LT,  LU,  LV,  MC,  MK,  MT,  NL,  NO,  PL,  PT,  RO,  RS,  SE,  SI,  SK,  SM,  TR 
TitleGerman:POLYMERMATERIALIEN[2018/50]
English:POLYMERIC MATERIALS[2018/50]
French:MATÉRIAUX POLYMÈRES[2018/50]
Examination procedure10.06.2019Amendment by applicant (claims and/or description)
12.06.2019Examination requested  [2019/30]
12.06.2019Date on which the examining division has become responsible
16.12.2019Despatch of a communication from the examining division (Time limit: M06)
17.06.2020Reply to a communication from the examining division
24.11.2020Communication of intention to grant the patent
24.03.2021Fee for grant paid
24.03.2021Fee for publishing/printing paid
24.03.2021Receipt of the translation of the claim(s)
Parent application(s)   TooltipEP15705068.3  / EP3110613
Opposition(s)Opponent(s)01  04.02.2022  08.02.2022  ADMISSIBLE
Evonik Operations GmbH
Rellinghauser Str. 1-11
45128 Essen / DE
Opponent's representative
Evonik Patent Association
C/o Evonik Industries AG
IP Management
Bau 1042A/PB 15
Paul-Baumann-Straße 1
45772 Marl / DE
 [N/P]
Former [2023/49]
Opponent(s)01  04.02.2022  08.02.2022  ADMISSIBLE
Evonik Operations GmbH
Rellinghauser Straße 1-11
45128 Essen / DE
Opponent's representative
Evonik Patent Association
c/o Evonik Industries AG
IP Management
Bau 1042A/PB 15
Paul-Baumann-Straße 1
45772 Marl / DE
Former [2022/11]
Opponent(s)01  04.02.2022  08.02.2022  ADMISSIBLE
Evonik Operations GmbH
Rellinghauser Straße 1-11
45128 Essen / DE
Opponent's representative
Bendele, Tanja
RUHR-IP Patentanwälte
Brucker Holt 58
45133 Essen / DE
22.02.2022Invitation to proprietor to file observations on the notice of opposition
22.06.2022Reply of patent proprietor to notice(s) of opposition
18.10.2023Legal effect of rejection of opposition [2024/14]
18.10.2023Date of oral proceedings
28.11.2023Despatch of minutes of oral proceedings
28.11.2023Date of despatch of rejection of opposition
Fees paidRenewal fee
29.10.2018Renewal fee patent year 03
29.06.2018Renewal fee patent year 04
21.02.2019Renewal fee patent year 05
24.02.2020Renewal fee patent year 06
22.02.2021Renewal fee patent year 07
Opt-out from the exclusive  Tooltip
competence of the Unified
Patent Court		 See the Register of the Unified Patent Court for opt-out data
Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Lapses during opposition  TooltipHU13.02.2015
AL05.05.2021
AT05.05.2021
CY05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
MC05.05.2021
MK05.05.2021
MT05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
TR05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
IE13.02.2022
LU13.02.2022
BE28.02.2022
CH28.02.2022
LI28.02.2022
[2024/42]
Former [2024/29]HU13.02.2015
AL05.05.2021
AT05.05.2021
CY05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
MC05.05.2021
MK05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
TR05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
IE13.02.2022
LU13.02.2022
BE28.02.2022
CH28.02.2022
LI28.02.2022
Former [2024/23]HU13.02.2015
AL05.05.2021
AT05.05.2021
CY05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
MC05.05.2021
MK05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
IE13.02.2022
LU13.02.2022
BE28.02.2022
CH28.02.2022
LI28.02.2022
Former [2024/20]HU13.02.2015
AL05.05.2021
AT05.05.2021
CY05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
MC05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
IE13.02.2022
LU13.02.2022
BE28.02.2022
CH28.02.2022
LI28.02.2022
Former [2024/18]HU13.02.2015
AL05.05.2021
AT05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
MC05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
IE13.02.2022
LU13.02.2022
BE28.02.2022
CH28.02.2022
LI28.02.2022
Former [2023/10]AL05.05.2021
AT05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
MC05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
IE13.02.2022
LU13.02.2022
BE28.02.2022
CH28.02.2022
LI28.02.2022
Former [2023/09]AL05.05.2021
AT05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
MC05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
IE13.02.2022
LU13.02.2022
CH28.02.2022
LI28.02.2022
Former [2022/47]AL05.05.2021
AT05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
MC05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
LU13.02.2022
Former [2022/44]AL05.05.2021
AT05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
MC05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2022/29]AL05.05.2021
AT05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SI05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2022/26]AL05.05.2021
AT05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2022/23]AT05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2022/10]AT05.05.2021
CZ05.05.2021
DK05.05.2021
EE05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
PT06.09.2021
IS22.12.2021
Former [2022/09]AT05.05.2021
CZ05.05.2021
DK05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
NL05.05.2021
PL05.05.2021
RO05.05.2021
RS05.05.2021
SE05.05.2021
SK05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2022/08]AT05.05.2021
CZ05.05.2021
DK05.05.2021
ES05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
NL05.05.2021
PL05.05.2021
RS05.05.2021
SE05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2022/07]AT05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
NL05.05.2021
PL05.05.2021
RS05.05.2021
SE05.05.2021
SM05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2022/04]AT05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
NL05.05.2021
PL05.05.2021
RS05.05.2021
SE05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2021/52]AT05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
PL05.05.2021
RS05.05.2021
SE05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2021/51]AT05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
RS05.05.2021
SE05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
IS05.09.2021
PT06.09.2021
Former [2021/50]AT05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
SE05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
PT06.09.2021
Former [2021/49]AT05.05.2021
FI05.05.2021
HR05.05.2021
LT05.05.2021
LV05.05.2021
SE05.05.2021
BG05.08.2021
NO05.08.2021
GR06.08.2021
Former [2021/46]AT05.05.2021
FI05.05.2021
LT05.05.2021
BG05.08.2021
Documents cited:Search[Y] EP2123430  (EOS ELECTRO OPTICAL SYST et al.) [Y] 1-15 * examples 1-6 * * page 3, line 2 - page 5, line 13 * * page 3, line 53 - page 4, line 3 * * figure 1 * * claims 1-16 *
 [Y] EP0184458  (ICI PLC et al.) [Y] 1-15 * page 2, line 17 - line 23 * * examples 1-5 * * table 1 * * claims 1-11 *
 [Y] EP0266132  (AMOCO CORP et al.) [Y] 1-15 * example 1 * * claims 1-8 *
 [Y] US4766197  (CLENDINNING ROBERT A et al.) [Y] 1-15 * tables I, II * * claims 1-6 *
 [A]   GHITA O R ET AL: "Physico-chemical behaviour of Poly (Ether Ketone) (PEK) in High Temperature Laser Sintering (HT-LS)", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, ELSEVIER, NL, vol. 214, no. 4, 15 November 2013 (2013-11-15), pages 969 - 978, XP028669844, ISSN: 0924-0136, DOI: 10.1016/J.JMATPROTEC.2013.11.007 [A] 1-15 * figures 10-13 * * table 1 * * page 970, column 2 * * abstract *

DOI:   http://dx.doi.org/10.1016/j.jmatprotec.2013.11.007
OppositionEP1674497
 EP2145913
 US4766197
 EP0225750
 EP0184458
 EP0266132
 WO2013085947
 WO2005030836
 DE10236697
 WO2010046483
   IAN GIBSON ET AL.: "Material properties and fabrication parameters in selective laser sintering process", RAPID PROTOYPING JOURNAL, vol. 3, no. 4, 1997, pages 129 - 136, XP055301397, DOI: 10.1108/13552549710191836

DOI:   http://dx.doi.org/10.1108/13552549710191836
   GHITA ET AL.: "Material properties and fabrication parameters in selective laser sintering process", GOOGLE SCHOLAR, vol. 61, 2014, pages 124 - 132, XP055894617, Retrieved from the Internet [retrieved on 20211122]
   "Laser Technology in Biomimetics. Biological and Medical Physics, Biomedical Engineering", 3 January 2014, Berlin, Heidelberg, article DUAN B. ET AL.: "Selective Laser Sintering and Its Biomedical Applications", pages: 88 - 98, XP055894623
   GHITA, O.R. ET AL.: "Physico-chemical behaviour of Poly(ether ketone) (PEK) in high temperature laser sintering (HT-LS", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, vol. 214, 15 November 2013 (2013-11-15), pages 969 - 978, XP028669844, DOI: 10.1016/j.jmatprotec.2013.11.007

DOI:   http://dx.doi.org/10.1016/j.jmatprotec.2013.11.007
   MCLAUCHLIN, A.R. ET AL.: "studies on the reprocessability of poly(ether ether ketone) (PEEK", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, vol. 214, 2014, pages 75 - 80, XP028728523, DOI: 10.1016/j.jmatprotec.2013.07.010

DOI:   http://dx.doi.org/10.1016/j.jmatprotec.2013.07.010
   "Organische Chemie", 2007, article PAULA Y. BRUICE: "Physikalische Eigenschaften von Polymeren", pages: 1449, XP055894638
   ZHANG, W.J. ET AL.: "Syntheses and properties of high performance poly(aryletheretherketone) copolymers", CHEMICAL JOURNAL OF CHINESE UNIVERSITIES, vol. 14, no. 5, 1993, pages 738 - 740, XP055894640 * offenbart Hochtemperatur SLS-Verfahren von PEK und zitiert D1 (1997) als Literaturstelle [16] wie folgt ?Gibson and Shi, clearly showed through experimental data that material properties (such as glass transition temperature and melting temperature of powders and powder blends) are key factors in defining fabrication parameters and influence strongly the mechanical properties of laser sintered components" *
   HANFU WANG, H. ET AL.: "Synthesis and thermal properties of PEEK-PEDEK block copolymers", POLYMER PREPRINTS, vol. 44, no. 2, 2003, pages 944 - 945, XP055590031
   WANG, H.F. ET AL.: "Synthesis and thermal properties of PEEK-PEDEK block copolymers", CHINESE JOURNAL OF CHINESE UNIVERSITIES, vol. 25, no. 6, pages 1156 - 1159, XP055894643
   LI, X.L. ET AL.: "Miscibility of poly(ether ether ketone) / (poly(ether diphenyl ether ketone) blends", POLYMER, vol. 37, no. 18, 1996, pages 4205 - 4208, XP022518792

DOI:   http://dx.doi.org/10.1016/0032-3861(96)00202-9
   SCHMIDT, M. ET AL.: "Selective Laser Sintering of PEEK", ANNALS OF THE CIRP, vol. 56, 2007, pages 205 - 208, XP002540089, DOI: 10.1016/j.cirp.2007.05.097

DOI:   http://dx.doi.org/10.1016/j.cirp.2007.05.097
   "Generative Fertigungsverfahren . Additive Manufacturing and 3D Drucken fr [...", 2013, CARL HANSER VERLAG GMBH & CO, article ANDREAS GEBHARDT: "3.2.4 Lasersintern EOS", pages: 176 - 189, XP055590970 * ; Chinesisch - PEEK-PEDEK *
   "Organische Chemie und Kunststoffe", vol. 2, 2009, article HANS BREUER: "dtv-Atlas Chemie", pages: 426 - 427, XP055894657
   ANONYMOUS: "Schmelzen", ROEMPP THIEME, 19 June 2020 (2020-06-19), pages 1 - 2, XP055894659, Retrieved from the Internet * ; Chinesisch *
   ANONYMOUS: "Sintern", ROEMPP THIEME, 19 June 2020 (2020-06-19), pages 1 - 8, XP055894811, Retrieved from the Internet * - PEEK-PEDEK *
   ANONYMOUS: "Gesetz zur Forderung der Kreislaufwirtschaft und Sicherung der umweltvertraglichen Bewirtschaftung von Abfallen", KREISLAUFWIRTSCHAFTSGESETZ - KRWG, 24 February 2012 (2012-02-24), pages 1 - 47, XP055894816 * (D21 wird als Literatustelle [07] zitiert von Githa (s. D2)) *
   ANONYMOUS: "Richtlinie 2008/98/ Eg Des Europischen Parlaments Und Des Rates", AMTSBLATT DER EUROPAISCHEN UNION, 19 November 2008 (2008-11-19), pages 1 - 30, XP055894827 * - allgem. Fachwissen *
   M. SCHMID: "Additive Fertigung mittels Selektivem Laser Sintern (SLS)", SPRINGER VIEWEG, 2015, pages 1 - 3, XP055894830
   ANONYMOUS: "Recycle", CAMBRIDGE DICTIONARY, 3 August 2020 (2020-08-03), pages 1 - 2, XP055894832, Retrieved from the Internet
   ANONYMOUS: "Schematische Darstellung des thermischen Verhaltens von PEEK/PEDEK", EVONIK - LEADING BEYOND CHEMISTRY, 3 September 2020 (2020-09-03), pages 1 - 4, XP055894835
   ANONYMOUS: "Preparation of PEEK-PEDEK", DSC GRAPHS RELATED TO THE EXPERIMENTAL RESULTS, 20 August 2020 (2020-08-20), pages 1 - 4, XP055894843
   XIANG LING JI ET AL.: "Miscibility of Poly(ether ether ketone) poly(ether diphenyl ether ketone)", POLYMER, vol. 37, no. 18, 1996, pages 4205 - 4208, XP055894849
   MANFRED SCHMID.: "Additive Fertigung mit Selektivem Lasersintern - Prozess - und Werkstoffbersicht", SPRINGER VERLAG, vol. 1, 2015, pages 13, XP055894853
   "Rapid Prototyping", 2000, article ANDREAS GEBHARDT: "Industrielle Rapid Prototyping systeme", pages: 126 - 130, XP055894860
   GABRIELE ALSTER: "Das Verhalten Teilkristalliner Thermoplaste Beim Lasersintern", DISSERTATION, 2000, pages 18 - 19, XP055894885
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