Patent US2749438A successfully refreshed from Google Patents.
US2749438A
Expired / Lapsed
US
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Resonator structure
Assignee: General Electric Co
•
Filing: 1952-08-21
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Granted: 1956-06-05
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Expires: 1972-08-21
Abstract
No abstract record available.
Inventors
- 👤 Anatole M Gurewitsch
- 👤 Philip C Noble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:53
CPC Classifications
H; H05; H05H; H05H7/00; H05H7/14; H05H7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2304540A
Cited
US2434508A
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US2514428A
Cited
US2553312A
Cited
US2579315A
Cited
US2600225A
Cited
FR976767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |