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: EP0556052

EP0556052 - A method for joining segments of 123 superconductor to form a superconducting article [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  23.10.1998
Database last updated on 18.03.2026
Most recent event   Tooltip30.07.2004Change - lapse in a contracting state
Updated state(s): LU		published on 15.09.2004  [2004/38]
Applicant(s)For all designated states
UNIVERSITY OF HOUSTON-UNIVERSITY PARK
4800 Calhoun Drive Houston
Texas 77004 / US
[N/P]
Former [1993/33]For all designated states
University of Houston-University Park
4800 Calhoun Drive
Houston, Texas 77004 / US
Inventor(s)01 / Salama, Kamel
13818 Kimberley
Houston, Texas 77079 / US
02 / Selvamanickam, Venkatakrishnan
9015 Ten Miles Road, Apt. 90
Knoxville, TN 37923 / US
[1993/36]
Former [1993/33]01 / Salama, Kamel
4800 Calhoun Road
Houston, Texas 77004 / US
02 / Selvamanickam, Venkatakrishnan
4800 Calhoun Road
Houston, Texas 77004 / US
Representative(s)Linn, Samuel Jonathan, et al
Mewburn Ellis LLP
City Tower
40 Basinghall Street
London EC2V 5DE / GB
[N/P]
Former [1993/33]Linn, Samuel Jonathan, et al
MEWBURN ELLIS York House 23 Kingsway
London WC2B 6HP / GB
Application number, filing date93301011.812.02.1993
[1993/33]
Priority number, dateUS1992083700114.02.1992         Original published format: US 837001
[1993/33]
Filing languageEN
Procedural languageEN
PublicationType: A1 Application with search report 
No.:EP0556052
Date:18.08.1993
Language:EN
[1993/33]
Type: B1 Patent specification 
No.:EP0556052
Date:17.12.1997
Language:EN
[1997/51]
Search report(s)(Supplementary) European search report - dispatched on:EP25.06.1993
ClassificationIPC:H01L39/02, H01L39/14
[1993/33]
CPC:
H10N60/80 (EP,US)
Designated contracting statesBE,   CH,   DE,   FR,   GB,   IE,   LI,   LU,   MC [1997/40]
Former [1993/33]AT,  BE,  CH,  DE,  DK,  ES,  FR,  GB,  GR,  IE,  IT,  LI,  LU,  MC,  NL,  PT,  SE 
TitleGerman:Verfahren zum Verbinden von 123-Supraleitersegmenten zur Formung eines supraleitenden Artikels[1993/33]
English:A method for joining segments of 123 superconductor to form a superconducting article[1993/33]
French:Méthode pour joindre des segments de supraconducteur de type 123 pour la formation d'un article supraconducteur[1993/33]
Examination procedure09.02.1994Examination requested  [1994/15]
07.03.1995Despatch of a communication from the examining division (Time limit: M06)
14.09.1995Reply to a communication from the examining division
07.05.1996Despatch of communication of intention to grant (Approval: No)
09.12.1996Despatch of a communication from the examining division (Time limit: M02)
17.01.1997Reply to a communication from the examining division
13.02.1997Despatch of a communication from the examining division (Time limit: M02)
21.04.1997Reply to a communication from the examining division
05.05.1997Despatch of communication of intention to grant (Approval: later approval)
20.06.1997Communication of intention to grant the patent
11.09.1997Fee for grant paid
11.09.1997Fee for publishing/printing paid
Opposition(s)18.09.1998No opposition filed within time limit [1998/50]
Fees paidRenewal fee
10.02.1995Renewal fee patent year 03
26.02.1996Renewal fee patent year 04
26.02.1997Renewal fee patent year 05
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  TooltipLU12.02.1998
IE17.02.1998
BE28.02.1998
CH28.02.1998
LI28.02.1998
MC31.08.1998
[2004/38]
Former [2003/18]IE17.02.1998
BE28.02.1998
CH28.02.1998
LI28.02.1998
LU28.02.1998
MC31.08.1998
Former [2003/17]IE17.02.1998
BE28.02.1998
CH28.02.1998
LI28.02.1998
LU28.02.1998
MC01.09.1998
Former [2001/01]IE17.02.1998
BE28.02.1998
CH28.02.1998
LI28.02.1998
LU28.02.1998
MC31.08.1998
Former [2000/17]BE28.02.1998
CH28.02.1998
LI28.02.1998
LU28.02.1998
MC31.08.1998
Former [2000/07]BE28.02.1998
LU28.02.1998
MC31.08.1998
Former [1999/27]BE28.02.1998
MC31.08.1998
Former [1998/51]MC31.08.1998
Documents cited:Search[A] JP1027172  
 [A]   JAPANESE JOURNAL OF APPLIED PHYSICS vol. 28, no. 10, October 1989, TOKYO, JP pages L1740 - L1741 Murayama N. et al 'Joining of Hot-Pressed Bi-Pb-Sr-Ca-Cu-O Superconductor'
 [A]   JAPANESE JOURNAL OF APPLIED PHYSICS vol. 29, no. 6, June 1990, TOKYO, JP pages L875 - L877 Murayama N. et al 'Hot-pressing of Bi-Pb-Sr-Ca-Cu-O Superconducting Thick Film'
 [A]   MATERIALS LETTERS vol. 12, no. 5, December 1991, AMSTERDAM, NL pages 316 - 320 Sturm M.J. et al 'Joining of YBa2Cu3O7-x superconductors' [A]
 [A]   PATENT ABSTRACTS OF JAPAN vol. 13, no. 213 (E-759) & JP-A-10 27 172 ( TOSHIBA ) [A]
 [A]   APPLIED PHYSICS LETTERS vol. 60, no. 7, 17 February 1992, NEW YORK, US pages 898 - 900 Salama K. et al 'Joining of high current bulk Y-Ba-Cu-O superconductors' [A]
ExaminationJP1027172
   PATENT ABSTRACTS OF JAPAN vol. 13, no. 213 (E-759) 18 May 1989 ; & JP-A-10 27 172
   NATURE, vol. 335, 15 September 1988, page 204; D. CAPLIN : 'Oxide Superconductors - Contrasts in Critical Current'
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.