Patent US4747124A successfully refreshed from Google Patents.
US2956239A
Expired / Lapsed
US
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Phase lock system
Assignee: US Philips Corp
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Filing: 1957-09-16
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Granted: 1960-10-11
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Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Hugenholtz Eduard Herman
- 👤 Towle Allistair Macalpine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:47
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/16; H03L7/20; H03L7/08; H03L7/10; H03L7/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |