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EP0075947
European procedure
Extract from the Register of European Patents
EP About this file: EP0075947
| EP0075947 - Switching power supply apparatus [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 15.07.1987 Database last updated on 17.07.2024 | Most recent event Tooltip | 15.08.2008 | Change - representative | published on 17.09.2008 [2008/38] | Applicant(s) | For all designated states Hitachi, Ltd. 5-1, Marunouchi 1-chome Chiyoda-ku Tokyo 100 / JP | [N/P] |
| Former [1983/14] | For all designated states Hitachi, Ltd. 5-1, Marunouchi 1-chome Chiyoda-ku, Tokyo 100 / JP | Inventor(s) | 01 /
Onda, Kenichi 2274-19, Onumacho Hitachi-shi / JP | 02 /
Abe, Kojin 4-5, Namekawahoncho-2-chome Hitachi-shi / JP | 03 /
Yabuno, Kohei 8-5, Suwacho-4-chome Hitachi-shi / JP | 04 /
Uemura, Takeshi 1782-1, Ohide, Nakajocho Kitakanbara-gun Niigata-ken / JP | [1983/14] | Representative(s) | Beetz & Partner mbB Patentanwälte Prinzregentenstraße 54 80538 München / DE | [N/P] |
| Former [2008/38] | Beetz & Partner Patentanwälte Steinsdorfstrasse 10 80538 München / DE | ||
| Former [1983/14] | Patentanwälte Beetz - Timpe - Siegfried Schmitt-Fumian - Mayr Steinsdorfstrasse 10 D-80538 München / DE | Application number, filing date | 82109012.3 | 29.09.1982 | [1983/14] | Priority number, date | JP19810153634 | 30.09.1981 Original published format: JP 15363481 | JP19820052546 | 30.03.1982 Original published format: JP 5254682 | [1983/14] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0075947 | Date: | 06.04.1983 | Language: | EN | [1983/14] | Type: | A3 Search report | No.: | EP0075947 | Date: | 01.02.1984 | Language: | EN | [1984/05] | Type: | B1 Patent specification | No.: | EP0075947 | Date: | 03.09.1986 | Language: | EN | [1986/36] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 02.12.1983 | Classification | IPC: | H02M3/335 | [1983/14] | CPC: |
H02M3/3385 (EP,US)
| Designated contracting states | DE, FR, GB, IT [1983/14] | Title | German: | Schalt-stromversorgungsgerät | [1986/36] | English: | Switching power supply apparatus | [1983/14] | French: | Dispositif d'alimentation de puissance à découpage | [1983/14] |
| Former [1983/14] | Taktstromversorgungsapparat | Examination procedure | 06.02.1984 | Examination requested [1984/16] | 12.12.1984 | Despatch of a communication from the examining division (Time limit: M04) | 16.04.1985 | Reply to a communication from the examining division | 14.08.1985 | Despatch of a communication from the examining division (Time limit: M02) | 14.08.1985 | Reply to a communication from the examining division | 18.10.1985 | Despatch of communication of intention to grant (Approval: ) | 11.02.1986 | Communication of intention to grant the patent | 09.04.1986 | Fee for grant paid | 09.04.1986 | Fee for publishing/printing paid | Opposition(s) | 04.06.1987 | No opposition filed within time limit [1987/36] | Fees paid | Renewal fee | 27.09.1984 | Renewal fee patent year 03 | 26.09.1985 | 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 | [A]US3999086 (EKELUND FOLKE JOSEF BERTIL [SE]); | [A]GB2050739 (GEN ELECTRIC CO LTD); | [A]US4263643 (KOIKE TSUTOMU) | [A] - ELECTRONIC DESIGN, vol. 28, no. 2, January 1980, pages 74-78, Rochelle Park., USA | Examination | - ELECTRONIC DESIGN, vol. 28, no. 2, January 1980, pages 74-78, Rochelle Park., USA "Moving from 20-kHz to over 200-kHz operation puts more punch in switcher performance" |