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EP0431869
European procedure
Extract from the Register of European Patents
EP About this file: EP0431869
| EP0431869 - Method for removing hydrogen fluoride from mixtures comprising aromatic ketones [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 03.06.1995 Database last updated on 22.08.2024 | Most recent event Tooltip | 03.06.1995 | No opposition filed within time limit | published on 26.07.1995 [1995/30] | Applicant(s) | For all designated states HOECHST CELANESE CORPORATION Route 202-206 North Somerville, N.J. 08876 / US | [1992/14] |
| Former [1991/24] | For all designated states HOECHST CELANESE CORPORATION Route 202-206 North, P.O. Box 2500 Somerville, NJ 08876-1258 / US | Inventor(s) | 01 /
Curtis, Thomas Arnold 12003 Woodholm Court Tega Cay, South Carolina / US | 02 /
Lindley, Daniel Dale 106 Shore Drive Portland, Texas / US | 03 /
Ryan, Timothy Richard 5406 Burnham Drive, Apt. 823 Corpus Christi, Texas / US | [1991/24] | Representative(s) | De Minvielle-Devaux, Ian Benedict Peter, et al CARPMAELS & RANSFORD 43, Bloomsbury Square London WC1A 2RA / GB | [1991/24] | Application number, filing date | 90313103.5 | 03.12.1990 | [1991/24] | Priority number, date | US19890445055 | 04.12.1989 Original published format: US 445055 | [1991/24] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0431869 | Date: | 12.06.1991 | Language: | EN | [1991/24] | Type: | A3 Search report | No.: | EP0431869 | Date: | 02.01.1992 | Language: | EN | [1992/01] | Type: | B1 Patent specification | No.: | EP0431869 | Date: | 03.08.1994 | Language: | EN | [1994/31] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 14.11.1991 | Classification | IPC: | C07C45/85, C07C45/82, C07C45/46, C07C51/083, C07C51/60 | [1991/24] | CPC: |
C07C51/60 (EP,US);
C07C51/64 (KR);
C07C45/46 (EP,US);
C07C45/85 (EP,US);
C07C2527/1206 (EP,US)
| Designated contracting states | AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LI, LU, NL, SE [1991/24] | Title | German: | Verfahren zur Trennung von Fluorwasserstoffsäure von aromatische Ketone enthaltenden Gemischen | [1991/24] | English: | Method for removing hydrogen fluoride from mixtures comprising aromatic ketones | [1991/24] | French: | Procédé pour la séparation de l'acide fluorhydrique à partir de mélanges contenant des cétones aromatiques | [1991/24] | Examination procedure | 09.06.1992 | Examination requested [1992/32] | 02.12.1993 | Despatch of communication of intention to grant (Approval: Yes) | 04.02.1994 | Communication of intention to grant the patent | 17.03.1994 | Fee for grant paid | 17.03.1994 | Fee for publishing/printing paid | Opposition(s) | 04.05.1995 | No opposition filed within time limit [1995/30] | Fees paid | Renewal fee | 23.09.1992 | Renewal fee patent year 03 | 27.09.1993 | 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 | [AD]US4059633 (CHILDS WILLIAM V); | [A]EP0215351 (MITSUBISHI GAS CHEMICAL CO [JP]) | [A] - JOURNAL OF THE AMERICAN CHEMICAL SOCIETY vol. 61, 1939, WASHINGTON DC US pages 1795 - 1796; J.H.SIMONS ET AL.: 'HYDROGEN FLUORIDE AS A CONDENSING AGENT. VII. THE ACYLATION OF AROMATIC COMPOUNDS.' |