Patent US2539218A successfully refreshed from Google Patents.
US2539218A
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Temperature compensating system for oscillators
Assignee: General Electric Co
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Filing: 1949-06-21
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Granted: 1951-01-23
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Expires: 1969-06-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph A Worcester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:41
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/258; H03; H03D; H03D7/00; H03D7/06; H03D7/08; H03L; H03L1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2019765A
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US2093331A
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US2114846A
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US2206238A
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US2151752A
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US2231389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |