US3495152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reference signal servo system
Assignee: Ampex Corp
•
Filing: 1968-03-01
•
Granted: 1970-02-10
•
Expires: 1988-03-01
Abstract
No abstract record available.
Inventors
- 👤 Samuel L Keiser
- 👤 Robert Z Langevin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:38
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/467; G11B15/473; G11B15/4731; G11B15/4733; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/20; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/907; Y10S388/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3064173A
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US2803792A
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US3174090A
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US3268788A
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US3277236A
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US3399334A
Cited
US3356921A
Cited
US3395326A
Cited
US3424966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |