blank Quick help
blank Maintenance news

Scheduled maintenance

Regular maintenance outages:
between 05.00 and 05.15 hrs CET (Monday to Sunday).

Other outages
Availability

2022.02.11

More...
blank News flashes

Italy joins the Federated Register

Click here for more information on the Federated Register.

2025-06-12

More...
blank Related links

Release notes
European Patent Register Assistant
European Patent Register User Manual
European Patent Register – pocket guide
FAQ - European Patent Register
Federated Register (Flyer)
Global Dossier (Flyer)
Register events
Deep link coverage
Federated Register content
The Patent Information Tour
Fair use charter

Extract from the Register of European Patents

EP About this file: EP2198167

EP2198167 - AIRFOIL DIFFUSER FOR A CENTRIFUGAL COMPRESSOR [Right-click to bookmark this link]
StatusPatent maintained as amended
Status updated on  18.03.2022
Database last updated on 10.03.2026
FormerThe patent has been granted
Status updated on  10.03.2017
FormerGrant of patent is intended
Status updated on  07.03.2017
Most recent event   Tooltip18.03.2022Patent maintained (B2 publication)published on 20.04.2022  [2022/16]
Applicant(s)For all designated states
Praxair Technology, Inc.
10 Riverview Drive
Danbury, CT 06810 / US
[2019/30]
Former [2017/15]For all designated states
Praxair Technology, Inc.
39 Old Ridgebury Road
Danbury, CT 06810 / US
Former [2010/25]For all designated states
Praxair Technology, Inc.
39 Old Ridgebury Road
Danbury, CT 06810 / US
Inventor(s)01 / ABDELWAHAB, Ahmed
69 The Commons
Grand Island NY 14072 / US
02 / GERBER, Gordon, J.
8815 Rockwood Road
Boston NY 14025 / US
 [2011/43]
Former [2010/25]01 / ABDELWAHAB, Ahmed
69 The Commons
Grand Island NY 14072 / US
02 / BAKER, Robert, Leroy
139 Brompton Road
Williamsville NY 14221 / US
03 / GERBER, Gordon, J.
8815 Rockwood Road
Boston NY 14025 / US
Representative(s)Schwan Schorer & Partner mbB
Patentanwälte
Bauerstraße 22
80796 München / DE
[2022/16]
Former [2017/15]Schwan Schorer & Partner mbB
Patentanwälte
Bauerstrasse 22
80796 München / DE
Former [2010/25]Schwan - Schwan - Schorer
Bauerstrasse 22
80796 München / DE
Application number, filing date08798620.425.08.2008
[2010/25]
WO2008US74195
Priority number, dateUS2007090359224.09.2007         Original published format: US 903592
[2010/25]
Filing languageEN
Procedural languageEN
PublicationType: A1 Application with search report
No.:WO2009042326
Date:02.04.2009
Language:EN
[2009/14]
Type: A1 Application with search report 
No.:EP2198167
Date:23.06.2010
Language:EN
The application published by WIPO in one of the EPO official languages on 02.04.2009 takes the place of the publication of the European patent application.
[2010/25]
Type: B1 Patent specification 
No.:EP2198167
Date:12.04.2017
Language:EN
[2017/15]
Type: B2 New European patent specification 
No.:EP2198167
Date:20.04.2022
Language:EN
[2022/16]
Search report(s)International search report - published on:EP02.04.2009
ClassificationIPC:F04D29/44
[2010/25]
CPC:
F04D29/444 (EP,US); F05D2250/52 (EP,US)
Designated contracting statesAT,   BE,   BG,   CH,   CY,   CZ,   DE,   DK,   EE,   ES,   FI,   FR,   GB,   GR,   HR,   HU,   IE,   IS,   IT,   LI,   LT,   LU,   LV,   MC,   MT,   NL,   NO,   PL,   PT,   RO,   SE,   SI,   SK,   TR [2017/15]
Former [2010/25]AT,  BE,  BG,  CH,  CY,  CZ,  DE,  DK,  EE,  ES,  FI,  FR,  GB,  GR,  HR,  HU,  IE,  IS,  IT,  LI,  LT,  LU,  LV,  MC,  MT,  NL,  NO,  PL,  PT,  RO,  SE,  SI,  SK,  TR 
TitleGerman:SCHAUFELDIFFUSOR FÜR EINEN ZENTRIFUGALVERDICHTER[2010/25]
English:AIRFOIL DIFFUSER FOR A CENTRIFUGAL COMPRESSOR[2010/25]
French:DIFFUSEUR À ÉLÉMENTS AÉRODYNAMIQUES POUR COMPRESSEUR CENTRIFUGE[2010/25]
Entry into regional phase26.03.2010National basic fee paid 
26.03.2010Designation fee(s) paid 
26.03.2010Examination fee paid 
Examination procedure26.03.2010Examination requested  [2010/25]
27.10.2016Communication of intention to grant the patent
06.03.2017Fee for grant paid
06.03.2017Fee for publishing/printing paid
06.03.2017Receipt of the translation of the claim(s)
Divisional application(s)The date of the Examining Division's first communication in respect of the earliest application for which a communication has been issued is  27.10.2016
Opposition(s)Opponent(s)01  12.01.2018  19.01.2018  ADMISSIBLE
Siemens Aktiengesellschaft
Werner-von-Siemens-Straße 1
80333 München / DE
Opponent's representative
PATERIS Patentanwälte PartmbB
Postfach 33 07 11
80067 München / DE
 [2021/19]
Former [2018/09]
Opponent(s)01  12.01.2018  19.01.2018  ADMISSIBLE
Siemens Aktiengesellschaft
Werner-von-Siemens-Straße 1
80333 München / DE
Former [2018/08]
Opponent(s)01  12.01.2018   
Siemens Aktiengesellschaft
Postfach 22 16 34
80506 München / DE
31.01.2018Invitation to proprietor to file observations on the notice of opposition
12.06.2018Reply of patent proprietor to notice(s) of opposition
01.06.2021Legal effect of interlocutory decision in opposition
01.06.2021Date of oral proceedings
18.10.2021Despatch of interlocutory decision in opposition
18.10.2021Despatch of minutes of oral proceedings
11.02.2022Despatch of communication that the patent will be maintained as amended
14.03.2022Fee for printing new specification paid
Fees paidRenewal fee
25.08.2010Renewal fee patent year 03
25.08.2011Renewal fee patent year 04
31.08.2012Renewal fee patent year 05
02.09.2013Renewal fee patent year 06
01.09.2014Renewal fee patent year 07
31.08.2015Renewal fee patent year 08
31.08.2016Renewal fee patent year 09
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  TooltipHU25.08.2008
AT12.04.2017
CY12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
PT12.04.2017
RO12.04.2017
SE12.04.2017
SI12.04.2017
SK12.04.2017
TR12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
GB25.08.2017
IE25.08.2017
LU25.08.2017
MT25.08.2017
BE31.08.2017
CH31.08.2017
FR31.08.2017
LI31.08.2017
[2020/27]
Former [2020/15]HU25.08.2008
AT12.04.2017
CY12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SI12.04.2017
SK12.04.2017
TR12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
GB25.08.2017
IE25.08.2017
LU25.08.2017
MT25.08.2017
BE31.08.2017
CH31.08.2017
FR31.08.2017
LI31.08.2017
Former [2019/46]HU25.08.2008
AT12.04.2017
CY12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SI12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
GB25.08.2017
IE25.08.2017
LU25.08.2017
MT25.08.2017
BE31.08.2017
CH31.08.2017
FR31.08.2017
LI31.08.2017
Former [2019/31]HU25.08.2008
AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SI12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
GB25.08.2017
IE25.08.2017
LU25.08.2017
MT25.08.2017
BE31.08.2017
CH31.08.2017
FR31.08.2017
LI31.08.2017
Former [2018/43]AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SI12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
GB25.08.2017
IE25.08.2017
LU25.08.2017
MT25.08.2017
BE31.08.2017
CH31.08.2017
FR31.08.2017
LI31.08.2017
Former [2018/37]AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SI12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
GB25.08.2017
IE25.08.2017
LU25.08.2017
BE31.08.2017
CH31.08.2017
FR31.08.2017
LI31.08.2017
Former [2018/35]AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SI12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
GB25.08.2017
IE25.08.2017
LU25.08.2017
CH31.08.2017
LI31.08.2017
Former [2018/34]AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SI12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
IE25.08.2017
LU25.08.2017
CH31.08.2017
LI31.08.2017
Former [2018/25]AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SI12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
CH31.08.2017
LI31.08.2017
Former [2018/21]AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
CH31.08.2017
LI31.08.2017
Former [2018/18]AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
MC12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
Former [2018/11]AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
IT12.04.2017
LT12.04.2017
LV12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
Former [2018/10]AT12.04.2017
CZ12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
LT12.04.2017
LV12.04.2017
NL12.04.2017
PL12.04.2017
RO12.04.2017
SE12.04.2017
SK12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
Former [2018/09]AT12.04.2017
DK12.04.2017
EE12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
LT12.04.2017
LV12.04.2017
NL12.04.2017
PL12.04.2017
SE12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
Former [2017/50]AT12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
LT12.04.2017
LV12.04.2017
NL12.04.2017
PL12.04.2017
SE12.04.2017
BG12.07.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
Former [2017/49]AT12.04.2017
ES12.04.2017
FI12.04.2017
HR12.04.2017
LT12.04.2017
NL12.04.2017
NO12.07.2017
GR13.07.2017
IS12.08.2017
Former [2017/48]NL12.04.2017
Cited inInternational search[A] US2007036647  (ABDELWAHAB AHMED et al.) [A] 1-14 * the whole document * * paragraph [0017] - paragraph [0020]; figures 1,2 *
 [A] US5529457  (TERASAKI MASATOSI et al.) [A] 1-14 * the whole document * * figure 6 *
 [DA] US2372880  (BROWNE KENNETH A et al.) [DA] 1-14 * the whole document *
OppositionDE19502808
 US6386830
 US4850795
 US4902200
 US2372880
 US5529457
 US2007036647
 DE19502808
 US6386830
 US4850795
 US4902200
 US5529457
   ENGEDA A. ET AL.: "Design and investigation of four low solidity vaned diffusers to assess the effect of solidity and vane number", ASME 1998 INTERNATIONAL GAS TURBINE AND AEROENGINE CONGRESS AND EXHIBITION, June 1998 (1998-06-01), XP055452393, Retrieved from the Internet
   JANSEN, M. ET AL.: "Design and investigations of a three dimensionally twisted diffuser for centrifugal compressors", ASME 1982 INTERNATIONAL GAS TURBINE CONFERENCE AND EXHIBIT. AMERICAN SOCIETY OF MECHANICAL ENGINEERS, 1982, XP055452397, Retrieved from the Internet
   ENGEDA A. ET AL.: "Design and investigation of four low solidity vaned diffusers to assess the effect of solidity and vane number", ASME 1998 INTERNATIONAL GAS TURBINE AND AEROENGINE CONGRESS AND EXHIBITION, June 1998 (1998-06-01), Retrieved from the Internet
   JANSEN, M. ET AL.: "Design and investigations of a three dimensionally twisted diffuser for centrifugal compressors", ASME 1982 INTERNATIONAL GAS TURBINE CONFERENCE AND EXHIBIT. AMERICAN SOCIETY OF MECHANICAL ENGINEERS, 1982, Retrieved from the Internet
The EPO accepts no responsibility for the accuracy of data originating from other authorities; in particular, it does not guarantee that it is complete, up to date or fit for specific purposes.