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EP0519594
European procedure
Extract from the Register of European Patents
EP About this file: EP0519594
| EP0519594 - Corrosion inhibition in highly acidic environments by use of pyridine salts in combination with certain cationic surfactants [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 08.10.1999 Database last updated on 15.06.2024 | Most recent event Tooltip | 01.08.2008 | Change - applicant | published on 03.09.2008 [2008/36] | Applicant(s) | For all designated states BAKER HUGHES INCORPORATED 3900 Essex Lane Suite 1200 Houston TX 77027 / US | [2008/36] |
| Former [1998/36] | For all designated states BAKER HUGHES INCORPORATED 3900 Essex Lane Houston, Texas 77027 / US | ||
| Former [1992/52] | For all designated states PETROLITE CORPORATION 369 Marshall Avenue Saint Louis Missouri 63119 / US | Inventor(s) | 01 /
Shah, Sayed Sadiq 8608 White Avenue St.Louis, Missouri 63144 / US | 02 /
Fahey, William F. 3915 Bowen St.Louis, Missouri 63116 / US | 03 /
Alink, Bernardus A. Oude 10557 Larkspur Drive St.Louis, Missouri 63123 / US | [1992/52] | Representative(s) | Seaborn, George Stephen, et al Edward Evans Barker Clifford's Inn, Fetter Lane London EC4A 1BZ / GB | [N/P] |
| Former [1992/52] | Seaborn, George Stephen, et al c/o Edward Evans & Co. Chancery House 53-64 Chancery Lane London WC2A 1SD / GB | Application number, filing date | 92304134.7 | 08.05.1992 | [1992/52] | Priority number, date | US19910706661 | 29.05.1991 Original published format: US 706661 | [1992/52] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0519594 | Date: | 23.12.1992 | Language: | EN | [1992/52] | Type: | B1 Patent specification | No.: | EP0519594 | Date: | 02.12.1998 | Language: | EN | [1998/49] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 12.10.1992 | Classification | IPC: | C23F11/04, C10G7/10 | [1992/52] | CPC: |
C10G7/10 (EP,US);
C23F11/04 (EP,US);
Y10S507/934 (EP,US)
| Designated contracting states | BE, DE, ES, FR, GB, IT, NL [1992/52] | Title | German: | Korrosionsinhibierung in stark säuren Medien mittels Pyridinsalzen zusammen mit bestimmten kationischen Tensiden | [1992/52] | English: | Corrosion inhibition in highly acidic environments by use of pyridine salts in combination with certain cationic surfactants | [1992/52] | French: | Inhibition de la corrosion dans des milieux fortement acides et utilisant des sels de pyridine en combinaison avec certains surfactants cationiques | [1992/52] | Examination procedure | 15.06.1993 | Examination requested [1993/32] | 19.07.1993 | Despatch of a communication from the examining division (Time limit: M06) | 22.01.1994 | Reply to a communication from the examining division | 04.08.1994 | Despatch of a communication from the examining division (Time limit: M06) | 14.02.1995 | Reply to a communication from the examining division | 14.02.1996 | Despatch of a communication from the examining division (Time limit: M07) | 06.01.1997 | Reply to a communication from the examining division | 17.03.1997 | Despatch of a communication from the examining division (Time limit: M06) | 20.09.1997 | Reply to a communication from the examining division | 18.11.1997 | Despatch of communication of intention to grant (Approval: Yes) | 19.03.1998 | Communication of intention to grant the patent | 23.04.1998 | Fee for grant paid | 23.04.1998 | Fee for publishing/printing paid | Opposition(s) | 03.09.1999 | No opposition filed within time limit [1999/47] | Request for further processing for: | 06.01.1997 | Request for further processing filed | 07.11.1996 | Full payment received (date of receipt of payment) Request granted | 03.02.1997 | Decision despatched | Fees paid | Renewal fee | 02.05.1994 | Renewal fee patent year 03 | 11.05.1995 | Renewal fee patent year 04 | 06.05.1996 | Renewal fee patent year 05 | 07.05.1997 | Renewal fee patent year 06 | 22.04.1998 | Renewal fee patent year 07 |
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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 | [X]US2006216 (ARTHUR MACARTHUR, et al); | [X]US2617771 (RUCKER JOHN T); | [X]US3252980 (BOLMER PERCE W, et al); | [X]US3885913 (REDMORE DEREK, et al); | [XD]US4071746 (QUINLAN PATRICK M); | [AD]US4770906 (HARWELL JEFFREY H [US], et al) |