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EP0248666
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EP About this file: EP0248666
| EP0248666 - Improvements in two-stage polybenzimidazole process [Right-click to bookmark this link] | Status | The application has been withdrawn Status updated on 07.03.1989 Database last updated on 14.03.2026 | Most recent event Tooltip | 07.07.2007 | Change - inventor | published on 08.08.2007 [2007/32] | Applicant(s) | For all designated states CELANESE CORPORATION 1211 Avenue of the Americas New York New York 10036 / US | [N/P] |
| Former [1987/50] | For all designated states CELANESE CORPORATION 1211 Avenue of the Americas New York New York 10036 / US | Inventor(s) | 01 /
Ward, Bennett C. 7932 Park Vista Circle Pineville North Carolina / US | 02 /
Jamison, Charles E. 1205 Hollow Tree Court Charlotte North Carolina / US | 03 /
Rierson, Donald R., Jr. 8613 Dogwood Drive Charlotte North Carolina / US | [1987/50] | Representative(s) | De Minvielle-Devaux, Ian Benedict Peter, et al CARPMAELS & RANSFORD 43, Bloomsbury Square London WC1A 2RA / GB | [1987/50] | Application number, filing date | 87304953.0 | 04.06.1987 | [1987/50] | Priority number, date | US19860871196 | 05.06.1986 Original published format: US 871196 | [1987/50] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0248666 | Date: | 09.12.1987 | Language: | EN | [1987/50] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 08.10.1987 | Classification | IPC: | C08G73/18 | [1987/50] | CPC: |
C08G73/18 (EP)
| Designated contracting states | DE, FR, GB, NL [1987/50] | Title | German: | Zweistufiges Polybenzimidazolverfahren | [1987/50] | English: | Improvements in two-stage polybenzimidazole process | [1987/50] | French: | Procédé en deux étapes de préparation de polybenzimidazole | [1987/50] | File destroyed: | 24.07.1995 | Examination procedure | 11.05.1988 | Examination requested [1988/28] | 03.03.1989 | Application withdrawn by applicant [1989/17] |
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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 | [A] MACROMOLECULES, vol. 5, no. 6, November-December 1972, pages 807-812; V.V. KORSHAK et al.: "Two-stage synthesis of poly(N-phenylbenzimidazoles)" [A] | [A] CHEMICAL ABSTRACTS, vol. 70, no. 22, 2nd June 1969, page 10, abstract no. 97284b, Columbus, Ohio, US; V.V. KORSHAK et al.: "Two-stage synthesis of polybenzimidazoles bases on 3,3'-diaminobenzidine and derivatives of terephtalic and 4,4'-diphenyldicarboxylic acids", & IZV. AKAD. NAUK. SSSR, SER. KHIM. 1969, (2), 480-1 [A] | [A] CHEMICAL ABSTRACTS, vol. 79, no. 8, 27th August 1973, pages 2-3, abstract no. 42284c, Columbus, Ohio, US; D.S. TUGUSHI et al.: "Two-stage synthesis and study of aromatic poly(N-phenylbenzimidazoles)", & VYSOKOMOL. SOEDIN., SER. A 1973, 15(5), 969-76 [A] |