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EP0012487
European procedure
Extract from the Register of European Patents
EP About this file: EP0012487
| EP0012487 - Process for the preparation of calcium sulphate anhydrite and calcium sulphate anhydrite obtained by this process [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 14.09.2016 Database last updated on 24.08.2024 | Most recent event Tooltip | 14.09.2016 | No opposition filed within time limit | Applicant(s) | For all designated states STAMICARBON B.V. Mijnweg 1 NL-6167 AC Geleen / NL | [1980/13] | Inventor(s) | 01 /
Weterings, Cornelis Antonius Maria Schineksstraat 18 NL-6171 AN Stein / NL | 02 /
Janssen, Johannes Anna Kloosterlaan 36 NL-6451 ER Schinveld / NL | [1980/13] | Representative(s) | Roeffen, Wilhelmus Johannes Maria, et al OCTROOIBUREAU DSM Postbus 9 NL-6160 MA Geleen / NL | [1980/13] | Application number, filing date | 79200754.4 | 12.12.1979 | [1980/13] | Priority number, date | NL19780012109 | 13.12.1978 Original published format: NL 7812109 | [1980/13] | Filing language | NL | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0012487 | Date: | 25.06.1980 | Language: | EN | [1980/13] | Type: | B1 Patent specification | No.: | EP0012487 | Date: | 05.05.1982 | Language: | EN | [1982/18] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 08.04.1980 | Classification | IPC: | C01F11/46, C04B11/02, // C09C1/02 | [1980/13] | CPC: |
C04B11/05 (EP,US);
C01F11/466 (EP,US);
C09C1/025 (EP,US);
C01P2004/61 (EP,US);
C01P2004/62 (EP,US)
| Designated contracting states | AT, BE, DE, FR, GB, IT, NL, SE [1980/13] | Title | German: | Verfahren zur Herstellung von Calciumsulfat-Anhydrit und nach diesem Verfahren erhaltenes Calciumsulfat-Anhydrit | [1980/13] | English: | Process for the preparation of calcium sulphate anhydrite and calcium sulphate anhydrite obtained by this process | [1980/13] | French: | Procédé de préparation d'anhydrite de sulfate de calcium et anhydrite de sulfate de calcium obtenu selon ce procédé | [1980/13] | Examination procedure | 18.12.1980 | Examination requested [1981/10] | 19.05.1981 | Despatch of communication of intention to grant (Approval: ) | 30.09.1981 | Communication of intention to grant the patent | 23.12.1981 | Fee for grant paid | 23.12.1981 | Fee for publishing/printing paid | Opposition(s) | 07.02.1983 | No opposition filed within time limit [ N /P ] | Fees paid | Renewal fee | 07.12.1981 | Renewal fee patent year 03 |
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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 | US2021910 [ ]; | US2956859 [ ] (WARREN RODGERS, et al) | [ ] - CHEMICAL ABSTRACTS, Vol. 89, No. 8, 21th August 1978, p. 589, no. 68725h Columbus, Ohio, U.S.A. A.K. KOSTANYAN et al.: "Study of anhydrite crystallization in phosphoric acid solutions" & ARM. KHIM. ZH. 1978, 31(5)320-7 (Russ.) * Abstract * |