US2929997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor amplifier
Assignee: US Philips Corp
•
Filing: 1956-03-13
•
Granted: 1960-03-22
•
Expires: 1976-03-13
Abstract
No abstract record available.
Inventors
- 👤 Cluwen Johannes Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:03
CPC Classifications
G; G01; G01R; G01R17/00; G01R17/10; G01R17/105; H; H03; H03F; H03F3/00; H03F3/30; H03F3/3083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2310342A
Cited
US2474435A
Cited
US2666817A
Cited
US2802907A
Cited
GB724682A
Cited
FR1088800A
Cited
FR1075579A
Cited
US2789164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |