Patent US3020491A successfully refreshed from Google Patents.
US3020491A
Expired / Lapsed
US
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Starting circuit for transistor power supply
Assignee: AIRCRAFT RADIO CORP
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Filing: 1959-03-04
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Granted: 1962-02-06
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Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 Donald P Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:45
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/338; H02M3/3382; H02M3/3384
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2852730A
Cited
US2837651A
Cited
US2927281A
Cited
US2946022A
Cited
US2874293A
Cited
US2948841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |