US2777064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency control system
Assignee: Individual
•
Filing: 1953-12-11
•
Granted: 1957-01-08
•
Expires: 1973-12-11
Abstract
No abstract record available.
Inventors
- 👤 Harris A Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:45
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/047; H03J7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2287925A
Cited
US2452575A
Cited
US2434293A
Cited
US2434294A
Cited
US2541454A
Cited
US2595609A
Cited
US2698904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |