US2928049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor amplifier circuit
Assignee: International Business Machines Corp
•
Filing: 1954-09-30
•
Granted: 1960-03-08
•
Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 Olin L Macsorley
- 👤 Henry E Cooley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:18
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/68; H03K; H03K5/00; H03K5/01; H03K5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1550684A
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US2535912A
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US2612567A
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US2647958A
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US2717931A
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US2646472A
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US2666818A
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US2680160A
Cited
US2760087A
Cited
US2655610A
Cited
US2759052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |