US2924723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase difference detector or frequency demodulator
Assignee: US Philips Corp
•
Filing: 1955-03-28
•
Granted: 1960-02-09
•
Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 Adrianus Johannes Wilhel Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:09
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/14; H03D13/00; H03D13/007; H03D13/009; H03D3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2476323A
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US2597575A
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US2713117A
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US2636133A
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US2771552A
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US2773181A
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US2765115A
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US2670445A
Cited
US2657318A
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US2758208A
Cited
US2798152A
Cited
US2804578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |