US3483542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable threshold playback amplifier
Assignee: Western Atlas Inc
•
Filing: 1967-01-24
•
Granted: 1969-12-09
•
Expires: 1987-01-24
Abstract
No abstract record available.
Inventors
- 👤 Alan K Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:54
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/16; G06F11/1608; G06F11/1612; G11; G11B; G11B20/00; G11B20/10; G11B20/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2239042A
Cited
US2597238A
Cited
US2807797A
Cited
US2901737A
Cited
US3041415A
Cited
US3182135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |