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EP0475568
European procedure
Extract from the Register of European Patents
EP About this file: EP0475568
| EP0475568 - Well cement fluid loss additive and method [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 11.11.1995 Database last updated on 14.11.2024 | Most recent event Tooltip | 11.11.1995 | No opposition filed within time limit | published on 03.01.1996 [1996/01] | Applicant(s) | For all designated states CONOCO INC. 1000 South Pine Street Ponca City Oklahoma 74603 / US | [N/P] |
| Former [1992/12] | For all designated states CONOCO INC. 1000 South Pine Street Ponca City Oklahoma 74603 / US | Inventor(s) | 01 /
Moran, Larry K. 105 Turquoise Place Ponca Cita, Oklahoma 74604 / US | 02 /
Murray, Thomas R. 826 N. 4th Ponca City, Oklahoma 74601 / US | [1992/12] | Representative(s) | Woodman, Derek, et al Frank B. Dehn & Co. St Bride's House 10 Salisbury Square London EC4Y 8JD / GB | [N/P] |
| Former [1992/12] | Woodman, Derek, et al Frank B. Dehn & Co. European Patent Attorneys Imperial House 15-19 Kingsway London WC2B 6UZ / GB | Application number, filing date | 91306688.2 | 23.07.1991 | [1992/12] | Priority number, date | US19900560533 | 31.07.1990 Original published format: US 560533 | [1992/12] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0475568 | Date: | 18.03.1992 | Language: | EN | [1992/12] | Type: | B1 Patent specification | No.: | EP0475568 | Date: | 11.01.1995 | Language: | EN | [1995/02] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 15.11.1991 | Classification | IPC: | C04B28/02, C04B24/26, E21B33/13, // (C04B28/02, 22:00, 22:14, 24:26, 24:32) | [1992/12] | CPC: |
C04B24/2623 (EP,US);
C04B28/02 (EP,US);
C09K8/46 (EP,US);
C09K8/487 (EP,US);
C09K8/512 (EP,US);
C04B2103/0049 (EP,US);
C04B2103/46 (EP,US)
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| C-Set: |
C04B28/02, C04B11/00, C04B22/0013, C04B24/2623, C04B2103/50 (EP,US);
C04B28/02, C04B22/0013, C04B22/143, C04B24/2623, C04B24/32 (US,EP) | Designated contracting states | DE, GB [1992/12] | Title | German: | Zusatzstoffe und Verfahren zur Kontrolle von Flüssigkeitsverlust von Zementschlamm | [1992/12] | English: | Well cement fluid loss additive and method | [1992/12] | French: | Additif et méthode de contrôle de perte de fluide pour laitier de ciment | [1992/12] | Examination procedure | 08.09.1992 | Examination requested [1992/45] | 21.04.1994 | Despatch of communication of intention to grant (Approval: No) | 04.07.1994 | Despatch of communication of intention to grant (Approval: later approval) | 11.07.1994 | Communication of intention to grant the patent | 26.08.1994 | Fee for grant paid | 26.08.1994 | Fee for publishing/printing paid | Opposition(s) | 12.10.1995 | No opposition filed within time limit [1996/01] | Fees paid | Renewal fee | 11.06.1993 | Renewal fee patent year 03 | 07.07.1994 | Renewal fee patent year 04 |
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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]US3058520 (WOODARD GEORGE W, et al); | [A]FR2206375 (ALEXANDER ALBERT [US]); | [A]US4069062 (BURGE THEODOR); | [A]EP0055035 (ICI PLC [GB]); | [AD]US4569395 (CARPENTER ROBERT B [US]); | [YP]US4967839 (CARPENTER ROBERT B [US], et al) |