US2794918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency control
Assignee: US Philips Corp
•
Filing: 1953-05-07
•
Granted: 1957-06-04
•
Expires: 1973-05-07
Abstract
No abstract record available.
Inventors
- 👤 Bourgonjon Louis Raymond
- 👤 Westbeck Gunnar Art Gunnarsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:14
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18; H03J7/20; H03J7/22; H03F; H03F1/00; H03F1/52; H03F1/54; H03J5/00; H03J5/24; H03J5/242; H03J7/02; H03J7/04; H03J7/047; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/10; H03L7/12; H03L7/16; H03L7/20; H04; H04L; H04L27/00; H04L27/18; H04L27/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2287925A
Cited
US2434294A
Cited
US2498089A
Cited
US2477428A
Cited
US2540333A
Cited
US2624005A
Cited
US2547890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |