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EP0425873
European procedure
Extract from the Register of European Patents
EP About this file: EP0425873
| EP0425873 - Use of high hydrocarbon containing gels as fracturation fluid [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 09.04.1998 Database last updated on 27.07.2024 | Most recent event Tooltip | 09.04.1998 | No opposition filed within time limit | published on 27.05.1998 [1998/22] | Applicant(s) | For all designated states HOECHST AKTIENGESELLSCHAFT 65926 Frankfurt am Main / DE | [N/P] |
| Former [1995/49] | For all designated states HOECHST AKTIENGESELLSCHAFT D-65926 Frankfurt am Main / DE | ||
| Former [1991/19] | For all designated states CASSELLA Aktiengesellschaft Hanauer Landstrasse 526 D-60386 Frankfurt / DE | Inventor(s) | 01 /
Engelhardt, Fritz, Dr. Hünfelder Strasse 20 W-6000 Frankfurt am Main 61 / DE | 02 /
Ebert, Gerlinde, Dr. Am Tannenstumpf 26 W-6072 Dreieich/Offenthal / DE | [1991/19] | Representative(s) | (deleted) | [1995/49] |
| Former [1994/38] | Muley, Ralf, Dr. Cassella AG, Patentabteilung, Hanauer Landstrasse 526 D-60386 Frankfurt / DE | ||
| Former [1991/19] | Urbach, Hans-Georg, Dr. Hanauer Landstrasse 526 D-60386 Frankfurt / DE | Application number, filing date | 90119666.7 | 13.10.1990 | [1991/19] | Priority number, date | DE19893935999 | 28.10.1989 Original published format: DE 3935999 | [1991/19] | Filing language | DE | Procedural language | DE | Publication | Type: | A2 Application without search report | No.: | EP0425873 | Date: | 08.05.1991 | Language: | DE | [1991/19] | Type: | A3 Search report | No.: | EP0425873 | Date: | 11.12.1991 | Language: | DE | [1991/50] | Type: | B1 Patent specification | No.: | EP0425873 | Date: | 04.06.1997 | Language: | DE | [1997/23] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 22.10.1991 | Classification | IPC: | E21B43/26 | [1991/19] | CPC: |
C09K8/64 (EP,US);
Y10S507/922 (EP,US)
| Designated contracting states | AT, DE, FR, GB, IT, NL [1991/19] | Title | German: | Verwendung kohlenwasserstoffreicher Gele als Fracturing-Flüssigkeiten | [1991/19] | English: | Use of high hydrocarbon containing gels as fracturation fluid | [1991/19] | French: | Utilisation de gèles riches en hydrocarbures comme fluide de fracturation | [1991/19] | Examination procedure | 03.12.1990 | Examination requested [1991/19] | 05.05.1993 | Despatch of a communication from the examining division (Time limit: M06) | 19.10.1993 | Reply to a communication from the examining division | 20.07.1994 | Despatch of a communication from the examining division (Time limit: M06) | 03.12.1994 | Reply to a communication from the examining division | 27.06.1995 | Despatch of a communication from the examining division (Time limit: M04) | 10.07.1995 | Reply to a communication from the examining division | 20.09.1995 | Despatch of a communication from the examining division (Time limit: M02) | 16.11.1995 | Reply to a communication from the examining division | 14.11.1996 | Despatch of communication of intention to grant (Approval: Yes) | 11.12.1996 | Communication of intention to grant the patent | 21.03.1997 | Fee for grant paid | 21.03.1997 | Fee for publishing/printing paid | Opposition(s) | 05.03.1998 | No opposition filed within time limit [1998/22] | Fees paid | Renewal fee | 10.09.1992 | Renewal fee patent year 03 | 23.08.1993 | Renewal fee patent year 04 | 31.10.1994 | Renewal fee patent year 05 | 31.10.1995 | Renewal fee patent year 06 | 31.10.1996 | Renewal fee patent year 07 |
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