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EP0305611
European procedure
Extract from the Register of European Patents
EP About this file: EP0305611
| EP0305611 - Foaming acid-containing fluids [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 27.02.1992 Database last updated on 19.10.2024 | Most recent event Tooltip | 27.02.1992 | No opposition filed within time limit | published on 15.04.1992 [1992/16] | Applicant(s) | For all designated states UNION OIL COMPANY OF CALIFORNIA 1201 West 5th Street Los Angeles California 90017 / US | [N/P] |
| Former [1989/10] | For all designated states UNION OIL COMPANY OF CALIFORNIA 1201 West 5th Street Los Angeles California 90017 / US | Inventor(s) | 01 /
Watkins, David R. 5292 Thorn Three Irvine, CA 92715 / US | [1991/17] |
| Former [1989/10] | 01 /
Watkins, David R. 5292 Thorn Three Irvine California 92715 / US | Representative(s) | Jack, Bruce J., et al Forrester & Boehmert Pettenkoferstrasse 20-22 80336 München / DE | [N/P] |
| Former [1989/10] | Jack, Bruce James, et al FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 D-80801 München / DE | Application number, filing date | 87307700.2 | 01.09.1987 | [1989/10] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0305611 | Date: | 08.03.1989 | Language: | EN | [1989/10] | Type: | B1 Patent specification | No.: | EP0305611 | Date: | 24.04.1991 | Language: | EN | [1991/17] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 10.06.1988 | Classification | IPC: | E21B37/06, E21B43/27, C23G1/02 | [1989/10] | CPC: |
C09K8/78 (EP);
C09K8/52 (EP)
| Designated contracting states | GB, NL [1989/10] | Title | German: | Schäumende, Säurehaltige Flüssigkeiten | [1989/10] | English: | Foaming acid-containing fluids | [1989/10] | French: | Fluides mousseux contenant un acide | [1989/10] | File destroyed: | 15.01.2000 | Examination procedure | 12.05.1989 | Examination requested [1989/29] | 31.05.1990 | Despatch of communication of intention to grant (Approval: Yes) | 13.09.1990 | Communication of intention to grant the patent | 05.11.1990 | Fee for grant paid | 05.11.1990 | Fee for publishing/printing paid | Opposition(s) | 25.01.1992 | No opposition filed within time limit [1992/16] | Fees paid | Renewal fee | 20.09.1989 | Renewal fee patent year 03 | 21.09.1990 | Renewal fee patent year 04 |
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