US3534280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opto thermal audio amplifier
Assignee: Texas Instruments Inc
•
Filing: 1966-12-30
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Granted: 1970-10-13
•
Expires: 1986-12-30
Abstract
No abstract record available.
Inventors
- 👤 James R Biard
- 👤 Jerry D Merryman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:42
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/08; H03F3/085; H10; H10F; H10F55/00; H10F55/20; H10F55/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2847519A
Cited
US3082381A
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US3040264A
Cited
US3283135A
Cited
US3341785A
Cited
US3410961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |