US2891157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency control means
Assignee: Servo Corp of America
•
Filing: 1952-11-24
•
Granted: 1959-06-16
•
Expires: 1972-11-24
Abstract
No abstract record available.
Inventors
- 👤 Paul G Hansel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:49
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/16; H03L7/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1994232A
Cited
US2248442A
Cited
US2295615A
Cited
US2398694A
Cited
US2436235A
Cited
US2516189A
Cited
US2521070A
Cited
US2476840A
Cited
US2581594A
Cited
US2672284A
Cited
US2627033A
Cited
US2617985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |