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EP0031724
European procedure
Extract from the Register of European Patents
EP About this file: EP0031724
| EP0031724 - Reinforced membranes, process and apparatus for making them, and use thereof as ion-exchange membranes in chlor-alkali cells or as catalysts [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 01.07.1985 Database last updated on 28.03.2026 | Most recent event Tooltip | 01.07.1985 | No opposition filed within time limit | published on 04.09.1985 [1985/36] | Applicant(s) | For all designated states E. I. du Pont de Nemours and Company 1007 Market Street Wilmington, DE 19898 / US | [N/P] |
| Former [1981/27] | For all designated states E.I. DU PONT DE NEMOURS AND COMPANY 1007 Market Street Wilmington Delaware 19898 / US | Inventor(s) | 01 /
Withers, Michael Somerville R.D.1 Box 177 Landenberg Pennsylvania 19350 / US | [1981/27] | Representative(s) | Myerscough, Philip Boyd, et al J.A.KEMP & CO. 14, South Square Gray's Inn London WC1R 5LX / GB | [1981/27] | Application number, filing date | 80304717.4 | 23.12.1980 | [1981/27] | Priority number, date | US19790107521 | 27.12.1979 Original published format: US 107521 | US19800121461 | 14.02.1980 Original published format: US 121461 | [1981/27] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0031724 | Date: | 08.07.1981 | Language: | EN | [1981/27] | Type: | A3 Search report | No.: | EP0031724 | Date: | 30.12.1981 | Language: | EN | [1981/52] | Type: | B1 Patent specification | No.: | EP0031724 | Date: | 22.08.1984 | Language: | EN | [1984/34] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 27.10.1981 | Classification | IPC: | B01D13/04, // C25B13/08, C08J5/22, B01J35/04 | [1981/27] | CPC: |
B01D69/1071 (EP,US);
B32B37/04 (EP,US);
B32B37/06 (EP,US);
B32B37/10 (EP,US);
B32B37/1027 (EP,US);
B32B38/1858 (EP,US);
C08J5/2237 (EP,US);
C08J5/2281 (EP,US);
C25B13/00 (EP,US);
| Designated contracting states | BE, DE, FR, GB, IT, NL [1981/27] | Title | German: | Verstärkte Membranen, Verfahren und Vorrichtung zu ihrer Herstellung und ihre Verwendung als Ionenaustauschermembranen in der Chloralkali-Elektrolyse oder als Katalysatoren | [1981/27] | English: | Reinforced membranes, process and apparatus for making them, and use thereof as ion-exchange membranes in chlor-alkali cells or as catalysts | [1981/27] | French: | Membranes renforcées, procédé et dispositif pour leur production et leur utilisation comme membranes échangeuses d'ions en cellules de chlore-alcali ou comme catalyseurs | [1981/27] | Examination procedure | 13.04.1982 | Examination requested [1982/25] | 16.02.1983 | Despatch of a communication from the examining division (Time limit: M06) | 16.08.1983 | Reply to a communication from the examining division | 09.11.1983 | Despatch of communication of intention to grant (Approval: ) | 06.02.1984 | Communication of intention to grant the patent | 19.04.1984 | Fee for grant paid | 19.04.1984 | Fee for publishing/printing paid | Opposition(s) | 23.05.1985 | No opposition filed within time limit [1985/36] | Fees paid | Renewal fee | 18.12.1982 | Renewal fee patent year 03 | 10.12.1983 | Renewal fee patent year 04 |
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