US2903522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor amplifier
Assignee: General Precision Laboratory Inc
•
Filing: 1955-07-07
•
Granted: 1959-09-08
•
Expires: 1975-07-07
Abstract
No abstract record available.
Inventors
- 👤 Robert A Flower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:06
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2290084A
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US2208665A
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US2212337A
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US2313096A
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US2554905A
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US2554211A
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US2663002A
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US2757246A
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US2751446A
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US2745068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |