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EP0182931
European procedure
Extract from the Register of European Patents
EP About this file: EP0182931
| EP0182931 - Process for the preparation of very pure magnesium oxide [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 20.12.1990 Database last updated on 30.04.2025 | Most recent event Tooltip | 20.12.1990 | No opposition filed within time limit | published on 06.02.1991 [1991/06] | Applicant(s) | For all designated states Gebrüder Sulzer Aktiengesellschaft Zürcherstrasse 9 CH-8401 Winterthur / CH | [N/P] |
| Former [1986/23] | For all designated states GEBRÜDER SULZER AKTIENGESELLSCHAFT Zürcherstrasse 9 CH-8401 Winterthur / CH | Inventor(s) | 01 /
Ainscow, William Stuart Löwenstrasse 23 CH-8400 Winterthur / CH | 02 /
Gadgil, Balkrishna Bhaskar Im Heidenloch 5 CH-8352 Räterschen / CH | [1986/23] | Representative(s) | Sparing Röhl Henseler Postfach 14 04 43 40074 Düsseldorf / DE | [N/P] |
| Former [1989/49] | Sparing Röhl Henseler Patentanwälte Postfach 14 04 43 D-40074 Düsseldorf / DE | ||
| Former [1986/23] | Dipl.-Ing. H. Marsch Dipl.-Ing. K. Sparing Dipl.-Phys.Dr. W.H. Röhl Patentanwälte Rethelstrasse 123 D-4000 Düsseldorf 1 / DE | Application number, filing date | 84114353.0 | 27.11.1984 | [1986/23] | Filing language | DE | Procedural language | DE | Publication | Type: | A1 Application with search report | No.: | EP0182931 | Date: | 04.06.1986 | Language: | DE | [1986/23] | Type: | B1 Patent specification | No.: | EP0182931 | Date: | 28.02.1990 | Language: | DE | [1990/09] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 14.08.1985 | Classification | IPC: | C01F5/02 | [1986/23] | CPC: |
C01F5/30 (EP,US);
C01C1/026 (EP,US);
C01F5/06 (EP,US);
C01P2006/80 (EP,US)
| Designated contracting states | AT, CH, DE, GB, IT, LI [1987/49] |
| Former [1986/23] | AT, BE, CH, DE, FR, GB, IT, LI, LU, NL, SE | Title | German: | Verfahren zum Herstellen von hochreinem Magnesiumoxid | [1986/23] | English: | Process for the preparation of very pure magnesium oxide | [1986/23] | French: | Procédé de préparation d'oxyde de magnésium ultra-pur | [1986/23] | Examination procedure | 26.11.1985 | Examination requested [1986/23] | 28.01.1986 | Loss of particular rights, legal effect: designated state(s) | 28.02.1986 | Despatch of communication of loss of particular rights: designated state(s) BE, FR, LU, NL, SE | 15.02.1988 | Despatch of a communication from the examining division (Time limit: M04) | 13.06.1988 | Reply to a communication from the examining division | 04.11.1988 | Despatch of a communication from the examining division (Time limit: M02) | 03.12.1988 | Reply to a communication from the examining division | 14.07.1989 | Despatch of communication of intention to grant (Approval: Yes) | 22.08.1989 | Communication of intention to grant the patent | 20.11.1989 | Fee for grant paid | 20.11.1989 | Fee for publishing/printing paid | Opposition(s) | 29.11.1990 | No opposition filed within time limit [1991/06] | Fees paid | Renewal fee | 25.11.1986 | Renewal fee patent year 03 | 14.11.1987 | Renewal fee patent year 04 | 14.11.1988 | Renewal fee patent year 05 | 09.11.1989 | 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]US1537479 (LORD RICHARD C); | [A]US1778659 (JOSEPH BLUMENFELD); | [Y]GB471234 (AMERICAN ZINC LEAD & SMELTING); | [Y]GB2051759 (SULZER AG) | [A] - CHEMICAL ABSTRACTS, Band 39, Nr. 13, 10. Juli 1945, Spalten 3401-3402-7, Columbus, Ohio, US; J.M. AVERY u.a.: "Modified MgO process yields MgCl2 and CaOCl2" & CHEM. & MET. ENG. 52, No. 4, 94-6 |