US2641741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal controlled modulated oscillator
Assignee: Phillips Petroleum Co
•
Filing: 1949-02-21
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Granted: 1953-06-09
•
Expires: 1969-02-21
Abstract
No abstract record available.
Inventors
- 👤 Peterson Glen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:40
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2159237A
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US2321269A
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US2345712A
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US2386049A
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US2407293A
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US2451858A
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US2469803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |