Patent US2737631A successfully refreshed from Google Patents.
US2737631A
Expired / Lapsed
US
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Cavity resonators
Assignee: International Standard Electric Corp
•
Filing: 1951-05-03
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Granted: 1956-03-06
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Expires: 1971-05-03
Abstract
No abstract record available.
Inventors
- 👤 Beck Arnold Hugh William
- 👤 Cutting Alan Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:55
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2551672A
Cited
US2410109A
Cited
GB583501A
Cited
US2487619A
Cited
US2474688A
Cited
US2500637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |