US3480850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thyristor inverter
Assignee: ALSACIENNE D ETUDES ET DE TRAV
•
Filing: 1968-05-14
•
Granted: 1969-11-25
•
Expires: 1988-05-14
Abstract
No abstract record available.
Inventors
- 👤 Paul L F Gaboriaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:37
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/523; H02M7/5233; H02M7/5236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3259831A
Cited
US3226625A
Cited
FR1331827A
Cited
US3302093A
Cited
US3267290A
Cited
US3405344A
Cited
US3409818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |