Patent US3718138A successfully refreshed from Google Patents.
Patent US3379954A successfully refreshed from Google Patents.
US3379954A
Expired / Lapsed
US
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Device comprising an inverter and an input filter for the said inverter
Assignee: US Philips Corp
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Filing: 1965-08-10
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Granted: 1968-04-23
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Expires: 1985-08-10
Abstract
No abstract record available.
Inventors
- 👤 Hehenkamp Theodorus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:50
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/516; H02H; H02H7/00; H02H7/10; H02H7/106; H02H7/12; H02H7/122; H02H7/1227; H05; H05B; H05B41/00; H05B41/14; H05B41/26; H05B41/28; H05B41/282; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |