US3370242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor amplifiers employing field effect transistors
Assignee: Beckman Coulter Inc
•
Filing: 1963-06-25
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Granted: 1968-02-20
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Expires: 1983-06-25
Abstract
No abstract record available.
Inventors
- 👤 Franklin F Offner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:13
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F3/45076; H03F3/4508; H03F3/34; H03F3/343; H03F3/345; H03F3/3455; H03F3/45376; H03F3/45394; H03F2203/00; H03F2203/45; H03F2203/45466; H03F2203/45494; H03F2203/45496; H03F2203/45504; H03F2203/45616; H03F2203/45702
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2638493A
Cited
US2936345A
Cited
US3018446A
Cited
US3024422A
Cited
US3131312A
Cited
US3178647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |