US3536858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random access optical sound track reproducer with automatic gain controlled amplifiers responsive to a reference zone on each track
Assignee: RCA Corp
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Filing: 1968-07-22
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Granted: 1970-10-27
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Expires: 1988-07-22
Abstract
No abstract record available.
Inventors
- 👤 Lester J Limbaugh
- 👤 Emrys C James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:26
CPC Classifications
G; G11; G11B; G11B7/00; F; F21; F21V; F21V11/00; G06; G06F; G06F3/00; G06F3/16; G11B7/12; G11B7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |