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EP0296636
European procedure
Extract from the Register of European Patents
EP About this file: EP0296636
| EP0296636 - High purity crystals of biphenyltetracarboxylic dianhydride and process for their preparation [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 16.02.1995 Database last updated on 26.07.2024 | Most recent event Tooltip | 16.02.1995 | No opposition filed within time limit | published on 05.04.1995 [1995/14] | Applicant(s) | For all designated states Ube Industries, Ltd. 12-32, Nishihonmachi 1-chome Ube-shi Yamaguchi 755-8633 / JP | [N/P] |
| Former [1988/52] | For all designated states UBE INDUSTRIES, LTD. 32-12, Nishihonmachi 1-chome Ube-shi Yamaguchi-ken 755 / JP | Inventor(s) | 01 /
Imatani, Katsuo c/o Ube Chemical Works Ube Industries Ltd. 1978-10, Kogushi Ube-shi Yamaguchi-ken / JP | 02 /
Yamamoto, Shinichirou c/o Ube Chemical Works Ube Industries Ltd. 1978-10, Kogushi Ube-shi Yamaguchi-ken / JP | 03 /
Koga, Genji c/o Ube Chemical Works Ube Industries Ltd. 1978-10, Kogushi Ube-shi Yamaguchi-ken / JP | [1988/52] | Representative(s) | Kraus, Walter, et al Patentanwälte Kraus, Weisert & Partner Thomas-Wimmer-Ring 15 80539 München / DE | [N/P] |
| Former [1988/52] | Kraus, Walter, Dr., et al Patentanwälte Kraus, Weisert & Partner Thomas-Wimmer-Ring 15 D-80539 München / DE | Application number, filing date | 88110211.5 | 27.06.1988 | [1988/52] | Priority number, date | JP19870159246 | 25.06.1987 Original published format: JP 15924687 | [1988/52] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0296636 | Date: | 28.12.1988 | Language: | EN | [1988/52] | Type: | A3 Search report | No.: | EP0296636 | Date: | 27.06.1990 | Language: | EN | [1990/26] | Type: | B1 Patent specification | No.: | EP0296636 | Date: | 13.04.1994 | Language: | EN | [1994/15] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 09.05.1990 | Classification | IPC: | C07D407/10 | [1988/52] | CPC: |
C08G73/1028 (EP,US);
C07C51/573 (EP,US);
C08G73/10 (EP,US)
| C-Set: |
C07C51/573, C07C63/331 (EP,US)
| Designated contracting states | DE, GB [1988/52] | Title | German: | Hochreine Kristalle des Diphenyltetracarbonsäuredianhydrids und Verfahren zu ihrer Herstellung | [1988/52] | English: | High purity crystals of biphenyltetracarboxylic dianhydride and process for their preparation | [1988/52] | French: | Cristaux de dianhydride d'acide diphényl-tétra-carboxylique d'une haute pureté et leur procédé de préparation | [1988/52] | Examination procedure | 05.11.1990 | Examination requested [1991/02] | 15.12.1992 | Despatch of a communication from the examining division (Time limit: M04) | 17.03.1993 | Reply to a communication from the examining division | 19.05.1993 | Despatch of communication of intention to grant (Approval: Yes) | 14.10.1993 | Communication of intention to grant the patent | 05.01.1994 | Fee for grant paid | 05.01.1994 | Fee for publishing/printing paid | Opposition(s) | 14.01.1995 | No opposition filed within time limit [1995/14] | Fees paid | Renewal fee | 30.05.1990 | Renewal fee patent year 03 | 27.06.1991 | Renewal fee patent year 04 | 24.06.1992 | Renewal fee patent year 05 | 25.06.1993 | Renewal fee patent year 06 |
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| Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court. | Documents cited: | Search | [Y]US3098095 (KNOBLOCH JAMES O, et al); | [Y]FR2178862 (UBE INDUSTRIES [JP]) |