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EP0058597
European procedure
Extract from the Register of European Patents
EP About this file: EP0058597
| EP0058597 - Thickened aqueous acid solutions, and their use, especially for descaling [Right-click to bookmark this link] | Status | Patent maintained as amended Status updated on 19.12.1986 Database last updated on 10.03.2026 | Most recent event Tooltip | 19.12.1986 | Patent maintained (B2 publication) | published on 04.02.1987 [1987/06] | Applicant(s) | For all designated states SOCIETE FRANCAISE HOECHST Société anonyme dite: 3, avenue du Général de Gaulle 92800 Puteaux / FR | [N/P] |
| Former [1982/34] | For all designated states SOCIETE FRANCAISE HOECHST Société anonyme dite: 3, avenue du Général de Gaulle F-92800 Puteaux / FR | Inventor(s) | 01 /
Siegel, Daniel 4, rue des Sablières F-78360 Montesson / FR | 02 /
Soreau, Michel 4, Jardins du Mont Griffard F-95160 Montmorency / FR | [1982/34] | Representative(s) | Rinuy, Guy, et al Cabinet Rinuy, Santarelli 14, Avenue de la Grande Armée 75017 Paris / FR | [N/P] |
| Former [1982/34] | Rinuy, Guy, et al Cabinet Rinuy et Santarelli 14, Avenue de la Grande Armée F-75017 Paris / FR | Application number, filing date | 82400193.7 | 04.02.1982 | [1982/34] | Priority number, date | FR19810002506 | 09.02.1981 Original published format: FR 8102506 | [1982/34] | Filing language | FR | Procedural language | FR | Publication | Type: | A1 Application with search report | No.: | EP0058597 | Date: | 25.08.1982 | Language: | FR | [1982/34] | Type: | B1 Patent specification | No.: | EP0058597 | Date: | 04.07.1984 | Language: | FR | [1984/27] | Type: | B2 New European patent specification | No.: | EP0058597 | Date: | 04.02.1987 | Language: | FR | [1987/06] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 21.06.1982 | Classification | IPC: | C02F5/10, E21B43/27 | [1982/34] | CPC: |
C02F5/10 (EP);
C09K8/78 (EP)
| Designated contracting states | AT, BE, CH, DE, FR, GB, IT, LI, NL [1982/34] | Title | German: | Verdickte wässrige saure Lösungen und ihre Verwendung, insbesondere zur Entkalkung | [1982/34] | English: | Thickened aqueous acid solutions, and their use, especially for descaling | [1982/34] | French: | Solutions aqueuses acides épaissies et leur application notamment pour le détartrage | [1982/34] | Examination procedure | 18.08.1982 | Examination requested [1982/43] | 18.05.1983 | Despatch of a communication from the examining division (Time limit: M02) | 11.06.1983 | Reply to a communication from the examining division | 29.09.1983 | Despatch of communication of intention to grant (Approval: ) | 20.12.1983 | Communication of intention to grant the patent | 20.01.1984 | Fee for grant paid | 20.01.1984 | Fee for publishing/printing paid | Opposition(s) | Opponent(s) | 01
21.03.1985
07.05.1985
ADMISSIBLE Röhm GmbH Kirschenallee 64293 Darmstadt / DE | [N/P] |
| Former [1985/22] | |||
| Opponent(s) | 01
21.03.1985
07.05.1985
ADMISSIBLE Röhm GmbH Kirschenallee D-64293 Darmstadt / DE | 09.05.1985 | Invitation to proprietor to file observations on the notice of opposition | 05.08.1985 | Reply of patent proprietor to notice(s) of opposition | 29.08.1985 | Communication of observations of patent proprietor (Time limit: M04) | 10.12.1985 | Reply of parties involved to observations of patent proprietor | 09.09.1986 | Despatch of communication that the patent will be maintained as amended | 18.10.1986 | Fee for printing new specification paid | Fees paid | Renewal fee | 04.02.1984 | Renewal fee patent year 03 |
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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 | [A] FR2280025 (CALGON CORP et al.) [A] | [A] US4103742 (SWANSON BILLY L et al.) [A] | [A] US4231882 (ELPHINGSTONE EUGENE A et al.) [A] | [A] FR1489341 (DOW CHEMICAL CO et al.) [A] |