US3536856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record-reproduce mode selection without mechanical relays
Assignee: Ampex Corp
•
Filing: 1967-09-20
•
Granted: 1970-10-27
•
Expires: 1987-09-20
Abstract
No abstract record available.
Inventors
- 👤 Erhard K Kietz
- 👤 Evangelos I Pezirtzoglou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:07
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/12; G11B15/14; G11B5/00; G11B5/48; G11B5/52; G11B5/53; G11B5/531
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3331927A
Cited
US3179909A
Cited
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 |