US3514688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Output-transformerless static inverter
Assignee: RTX Corp
•
Filing: 1968-03-28
•
Granted: 1970-05-26
•
Expires: 1988-03-28
Abstract
No abstract record available.
Inventors
- 👤 Henry E Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:51
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/483; H02M7/49; H02M7/53; H02M7/537
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1691986A
Cited
FR1151584A
Cited
US3100851A
Cited
US3391323A
Cited
US3419780A
Cited
US3440514A
Cited
US3430073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |