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EP0300769
European procedure
Extract from the Register of European Patents
EP About this file: EP0300769
| EP0300769 - Prevention of post oxidation of methacrolein [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 17.02.1994 Database last updated on 28.03.2026 | Most recent event Tooltip | 17.02.1994 | No opposition filed within time limit | published on 06.04.1994 [1994/14] | Applicant(s) | For all designated states MITSUI TOATSU CHEMICALS, Inc. 2-5 Kasumigaseki 3-chome Chiyoda-Ku Tokyo 100 / JP | For all designated states KURARAY CO., LTD. 1621 Sakazu Kurashiki-shi, Okayama-ken 710-0801 / JP | [N/P] |
| Former [1992/23] | For all designated states MITSUI TOATSU CHEMICALS, Inc. 2-5 Kasumigaseki 3-chome Chiyoda-Ku Tokyo 100 / JP | ||
| For all designated states Kuraray Co., Ltd. 1621, Sakazu Kurashiki-shi Okayama-ken / JP | |||
| Former [1991/41] | For all designated states MITSUI TOATSU CHEMICALS INC. No. 2-5, Kasumigaseki 3-chome Chiyoda-Ku Tokyo 100 / JP | ||
| For all designated states Kuraray Co., Ltd. 1621, Sakazu Kurashiki-shi Okayama-ken / JP | |||
| Former [1989/04] | For all designated states MITSUI TOATSU CHEMICALS INC. No. 2-5, Kasumigaseki 3-chome Chiyoda-Ku Tokyo 100 / JP | ||
| For all designated states KYOWA GAS CHEMICAL INDUSTRY CO., LTD. 8-2, 3-chome, Nihonbashi Chuo-ku, Tokyo / JP | Inventor(s) | 01 /
Kuragano, Morimasa 2-2-1-418, Shinhinoodai Sakai-shi Osaka-fu / JP | 02 /
Iwasaki, Kozo 1071-2-306, Nakano Totsuka-ku Yokohama-shi Kanagawa-ken / JP | 03 /
Koyama, Yoshio 3-9-5-544, Nishitoriishi Takaishi-shi Osaka-fu / JP | 04 /
Isobe, Takeshi 7-4-33, Ayazono Takaishi-shi Osaka-fu / JP | 05 /
Segawa, Hirozo 2-1, Kyowamachi Nakajocho Kitakanbara-gun Niigata-ken / JP | 06 /
Yoguchi, Katsuji 2-5A-515, Kyowamachi Nakajocho Kitakanbara-gun Niigata-ken / JP | [1989/04] | Representative(s) | Holdcroft, James Gerald, et al Graham Watt & Co LLP St Botolph's House 7-9 St Botolph's Road Sevenoaks Kent TN13 3AJ / GB | [N/P] |
| Former [1989/04] | Holdcroft, James Gerald, Dr., et al Graham Watt & Co., Riverhead Sevenoaks, Kent TN13 2BN / GB | Application number, filing date | 88306668.0 | 20.07.1988 | [1989/04] | Priority number, date | JP19870183565 | 24.07.1987 Original published format: JP 18356587 | [1989/04] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0300769 | Date: | 25.01.1989 | Language: | EN | [1989/04] | Type: | A3 Search report | No.: | EP0300769 | Date: | 27.12.1989 | Language: | EN | [1989/52] | Type: | B1 Patent specification | No.: | EP0300769 | Date: | 14.04.1993 | Language: | EN | [1993/15] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 07.11.1989 | Classification | IPC: | C07C47/22, C07C45/86 | [1989/04] | CPC: |
C07C45/38 (EP,US);
C07C21/04 (KR);
B01J8/067 (EP,US);
C07C45/35 (EP,US);
C07C45/37 (EP,US);
C07C45/86 (EP,US);
| C-Set: |
C07C45/35, C07C47/22 (EP,US);
C07C45/37, C07C47/22 (US,EP);
C07C45/38, C07C47/22 (US,EP);
C07C45/86, C07C47/22 (US,EP) | Designated contracting states | BE, DE, FR, GB, IT, NL [1989/04] | Title | German: | Vorbeugung der Nachoxidaton von Methacrolein | [1989/04] | English: | Prevention of post oxidation of methacrolein | [1989/04] | French: | Empêchement de l'après-oxidation de méthacroléine | [1989/04] | Examination procedure | 20.06.1990 | Examination requested [1990/33] | 26.05.1992 | Despatch of communication of intention to grant (Approval: Yes) | 14.10.1992 | Communication of intention to grant the patent | 23.12.1992 | Fee for grant paid | 23.12.1992 | Fee for publishing/printing paid | Opposition(s) | 15.01.1994 | No opposition filed within time limit [1994/14] | Fees paid | Renewal fee | 06.07.1990 | Renewal fee patent year 03 | 20.12.1990 | Renewal fee patent year 04 | 16.06.1992 | Renewal fee patent year 05 |
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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] JP49054317 | [AD] CHEMICAL ABSTRACTS, Vol. 81, No. 25, 23 December 1974, Abstract No. 169131b, Columbus, Ohio, USA; Y. TAGAWA et al.: "Methacrolein from isobutylene"; & JP-A-49 054 317 (NIPPON KAYAKU) (27-05-1974) | Examination | JP7454317 | CHEMICAL ABSTRACTS, vol 81, no. 25, 23 Dec. 1974, abstract no. 169131b, Columbus, Ohio, US; Y. TAGAWA et al.: "Methacrolein from isobutylene"; & JP-A-7454317 |