Patent US3440652A successfully refreshed from Google Patents.
US3440652A
Expired / Lapsed
US
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Hierarchy clock synchronization
Assignee: Sierra Research Corp
•
Filing: 1967-10-02
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Granted: 1969-04-22
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Expires: 1987-10-02
Abstract
No abstract record available.
Inventors
- 👤 Martin R Bates
- 👤 Johannes W Prast
- 👤 William V Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:58
CPC Classifications
G; G01; G01S; G01S11/00; G01S11/02; G01S11/08; G04; G04R; G04R20/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3336591A
Cited
US3388393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |