US2978627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistorized power supplies
Assignee: Individual
•
Filing: 1957-02-26
•
Granted: 1961-04-04
•
Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Walter F Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:54
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/5381; H02M7/02; H02M7/04; H02M7/06; H02M7/10; H02M7/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US2745012A
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US2753509A
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US2720622A
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US2776372A
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US2791739A
Cited
US2780767A
Cited
US2854614A
Cited
US2748274A
Cited
US2785236A
Cited
US2804547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |