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EP0208831
European procedure
Extract from the Register of European Patents
EP About this file: EP0208831
| EP0208831 - Method of preparing hexamethylcyclotrisilazane [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 16.11.1991 Database last updated on 09.04.2026 | Most recent event Tooltip | 12.11.1999 | Lapse of the patent in a contracting state | published on 29.12.1999 [1999/52] | Applicant(s) | For all designated states HÜLS AMERICA INC. (a Delaware corporation) 80 Centennial Avenue Piscataway New Jersey 08855 / US | [N/P] |
| Former [1990/39] | For all designated states HÜLS AMERICA INC. (a Delaware corporation) 80 Centennial Avenue Piscataway New Jersey 08855 / US | ||
| Former [1987/04] | For all designated states Petrarch Systems, Inc. 2570 Pearl Buck Road Bristol Pennsylvania 19007 / US | Inventor(s) | 01 /
Arkles, Barry C. 1542 Cooper Drive Amber, Pa. 19002 / US | 02 /
Hamon, Burrell N. 717 Warwick Road Fairless Hills, Pa. 19030 / US | [1987/04] | Representative(s) | Koepsell, Helmut Frankenforster Strasse 135-137 51427 Bergisch Gladbach / DE | [N/P] |
| Former [1987/04] | Koepsell, Helmut, Dipl.-Ing. Mittelstrasse 7 D-50672 Köln / DE | Application number, filing date | 86102688.8 | 01.03.1986 | [1987/04] | Priority number, date | US19850755049 | 15.07.1985 Original published format: US 755049 | [1987/04] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0208831 | Date: | 21.01.1987 | Language: | EN | [1987/04] | Type: | A3 Search report | No.: | EP0208831 | Date: | 15.04.1987 | Language: | EN | [1987/16] | Type: | B1 Patent specification | No.: | EP0208831 | Date: | 16.01.1991 | Language: | EN | [1991/03] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 27.02.1987 | Classification | IPC: | C07F7/21 | [1987/04] | CPC: |
C07F7/10 (EP,US);
C07F7/21 (EP,US)
| Designated contracting states | AT, BE, CH, DE, FR, GB, IT, LI, LU, NL, SE [1987/04] | Title | German: | Verfahren zur Herstellung von Hexamethylcyclotrisilazan | [1987/04] | English: | Method of preparing hexamethylcyclotrisilazane | [1987/04] | French: | Méthode pour préparer la hexaméthylcyclotrisilazane | [1987/04] | Examination procedure | 09.10.1987 | Examination requested [1987/49] | 21.06.1988 | Despatch of a communication from the examining division (Time limit: M04) | 23.09.1988 | Reply to a communication from the examining division | 22.03.1989 | Despatch of a communication from the examining division (Time limit: M04) | 24.07.1989 | Reply to a communication from the examining division | 28.02.1990 | Despatch of communication of intention to grant (Approval: Yes) | 04.07.1990 | Communication of intention to grant the patent | 20.09.1990 | Fee for grant paid | 20.09.1990 | Fee for publishing/printing paid | Opposition(s) | 17.10.1991 | No opposition filed within time limit [1992/02] | Fees paid | Renewal fee | 20.02.1988 | Renewal fee patent year 03 | 21.02.1989 | Renewal fee patent year 04 | 04.01.1990 | Renewal fee patent year 05 |
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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. | Lapses during opposition Tooltip | LU | 31.03.1991 | [1999/52] | Documents cited: | Search | [A] CHEMICAL ABSTRACTS, vol. 62, no. 8, 12th April 1965, no. 9165g, Columbus, Ohio, US; K.A. ANDRIANOV et al.: "Reactions of organocyclosilazaneswith electrophilic and nucleophilic reagents", & J. ORGANOMETAL. CHEM. 3(2), 129-37(1965) [A] | Examination | T.W.GREENE, Protective Groups in org. Synthesis, p. 295,296;Wiley-Interse. [A] | M. HUDLICKY, Reductions in org. Chemistry, p. 84,85,98,99,102,103,142,143; Wiley & Sons |