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EP0004701
European procedure
Extract from the Register of European Patents
EP About this file: EP0004701
| EP0004701 - A method of and apparatus for reducing priming and sweep-out losses in SCR switching circuits [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 14.09.2016 Database last updated on 28.03.2026 | Most recent event Tooltip | 14.09.2016 | No opposition filed within time limit | Applicant(s) | For all designated states MEGAPULSE INCORPORATED 8, Preston Court Bedford Massachusetts 01738 / US | [N/P] | Inventor(s) | 01 /
Johannessen, Paul Romberg 40 Tyler Road Lexington Massachusetts / US | [N/P] | Representative(s) | Baker, Arthur, et al c/o EDWARD EVANS & CO. Chancery House 53-64 Chancery Lane London WC2A 1SD / GB | [1982/48] | Application number, filing date | 79300254.4 | 20.02.1979 | Priority number, date | US19780893966 | 06.04.1978 Original published format: US 893966 | Filing language | EN | Procedural language | EN | Publication | Type: | A3 Search report | No.: | EP0004701 | Date: | Status: | (deleted) | [N/P] | Type: | A2 Application without search report | No.: | EP0004701 | Date: | 17.10.1979 | Language: | EN | [N/P] | Type: | B1 Patent specification | No.: | EP0004701 | Date: | 01.12.1982 | Language: | EN | [1982/48] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 28.08.1979 | Classification | IPC: | H03K17/04, H03K17/72, H02M3/135, H04B1/04 | [1982/48] | CPC: |
H03K17/73 (EP,US);
H02M3/137 (EP,US);
H03K17/0403 (EP,US);
H03K2217/0036 (EP,US)
| Designated contracting states | DE, FR, GB, IT, NL | Title | German: | Verfahren und Vorrichtung zur Verminderung der Verluste beim Erregen und bei der Träger-Evakuierung in Thyristor-Schaltkreisen | English: | A method of and apparatus for reducing priming and sweep-out losses in SCR switching circuits | French: | Méthode et dispositif de réduction des pertes à l'amorçage et lors de la suppression des porteurs dans des circuits de commutation à thyristors | Examination procedure | 14.04.1980 | Examination requested [1980/14] | 27.02.1981 | Despatch of a communication from the examining division (Time limit: M04) | 20.06.1981 | Reply to a communication from the examining division | 15.03.1982 | Despatch of communication of intention to grant (Approval: ) | 21.05.1982 | Communication of intention to grant the patent | 20.08.1982 | Fee for grant paid | 20.08.1982 | Fee for publishing/printing paid | Opposition(s) | 01.09.1983 | No opposition filed within time limit [ N /P ] | Fees paid | Renewal fee | 25.02.1981 | Renewal fee patent year 03 | 26.02.1982 | 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] FR1396036 (FRAKO CONDENSATOREN UND APPBAU et al.) | [A] US3549908 (HOULNE ROBERT C et al.) | US3958137 (IIDA TAKAHIKO et al.) | GB1260967 (MARCONI CO LTD et al.) | DE2600428 |