Patent US2945187A successfully refreshed from Google Patents.
US2945187A
Expired / Lapsed
US
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Temperature compensated transistor amplifier
Assignee: Phillips Petroleum Co
•
Filing: 1956-08-24
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Granted: 1960-07-12
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Expires: 1976-08-24
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Mccollom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:57
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/302
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2531458A
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US2724304A
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US2666818A
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US2666819A
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US2791644A
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US2762870A
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US2747455A
Cited
US2900215A
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US2859402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |