US3500066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency power transistor with individual current limiting control for thermally isolated regions
Assignee: AT&T Inc
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Filing: 1968-01-10
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Granted: 1970-03-10
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Expires: 1988-01-10
Abstract
No abstract record available.
Inventors
- 👤 Robert L Pritchett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:43
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/20; H03F3/21; H03F3/213; H03F1/00; H03F1/08; H03F1/22; H03F3/211; H10; H10D; H10D99/00; H10W; H10W90/00
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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |