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EP0053916
European procedure
Extract from the Register of European Patents
EP About this file: EP0053916
| EP0053916 - Control system for induction motor using inverter for AC power supply [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 14.03.1986 Database last updated on 24.08.2024 | Most recent event Tooltip | 14.03.1986 | No opposition filed within time limit | published on 30.04.1986 [1986/18] | Applicant(s) | For all designated states Hitachi, Ltd. 5-1, Marunouchi 1-chome Chiyoda-ku Tokyo 100 / JP | [N/P] |
| Former [1982/24] | For all designated states Hitachi, Ltd. 5-1, Marunouchi 1-chome Chiyoda-ku, Tokyo 100 / JP | Inventor(s) | 01 /
Sakai, Keijiro 10-2, Suehirocho-3-chome Hitachi-shi / JP | 02 /
Matsuda, Yasuo 1047-189, Moriyamacho Hitachi-shi / JP | 03 /
Honbu, Mitsuyuki 4851-46, Oaza Nakane Katsuta-shi / JP | [1982/24] | Representative(s) | Paget, Hugh Charles Edward, et al Mewburn Ellis LLP City Tower 40 Basinghall Street London EC2V 5DE / GB | [N/P] |
| Former [1984/12] | Paget, Hugh Charles Edward, et al MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP / GB | ||
| Former [1982/24] | Jackson, John Timothy MEWBURN ELLIS & CO. 2/3 Cursitor Street London EC4A 1BQ / GB | Application number, filing date | 81305711.4 | 03.12.1981 | [1982/24] | Priority number, date | JP19800170953 | 05.12.1980 Original published format: JP 17095380 | JP19810101176 | 01.07.1981 Original published format: JP 10117681 | [1982/24] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0053916 | Date: | 16.06.1982 | Language: | EN | [1982/24] | Type: | B1 Patent specification | No.: | EP0053916 | Date: | 08.05.1985 | Language: | EN | [1985/19] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 22.03.1982 | Classification | IPC: | H02P7/62 | [1982/24] | CPC: |
H02P27/06 (EP,US);
H02P27/047 (EP,US)
| Designated contracting states | DE, GB [1982/24] | Title | German: | Steuersystem für einen Induktionsmotor unter Verwendung eines Umrichters als Wechselstromgenerator | [1982/24] | English: | Control system for induction motor using inverter for AC power supply | [1982/24] | French: | Système de commande pour un moteur à induction employant un onduleur comme générateur de courant alternatif | [1982/24] | File destroyed: | 15.01.2000 | Examination procedure | 15.11.1982 | Examination requested [1983/04] | 15.05.1984 | Despatch of communication of intention to grant (Approval: ) | 02.08.1984 | Communication of intention to grant the patent | 24.08.1984 | Fee for grant paid | 24.08.1984 | Fee for publishing/printing paid | Opposition(s) | 11.02.1986 | No opposition filed within time limit [1986/18] | Fees paid | Renewal fee | 20.12.1983 | Renewal fee patent year 03 | 17.12.1984 | 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 | DE2516247 [ ] (HITACHI LTD); | US4207510 [ ] (WOODBURY JAMES R [US]) | [ ] - IEEE Transactions on Power Apparatus and Systems, Vol. PAS 99, No. 4 July/August 1980 New York N. MOHAN "Improvement in Energy Efficiency of Induction Motors by Means of Voltage Control" pages 1466 to 1471 * page 1466, Introduction; page 1470, Conclusions * | [ ] - Popular Electronics October 1979 New York M.H. MARKS "NASA Motor-Control Circuit Cuts Electric Cost" pages 39 to 43 " page 40, column 1 * |