Patent US2737634A successfully refreshed from Google Patents.
US2737634A
Expired / Lapsed
US
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Waveguide elbow
Assignee: International Standard Electric Corp
•
Filing: 1952-01-03
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Granted: 1956-03-06
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Expires: 1972-01-03
Abstract
No abstract record available.
Inventors
- 👤 Lewin Leonard
- 👤 Pethick Albert Edwin
- 👤 Setchfield John Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:25
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/02; H01P1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23131E
Cited
US2563612A
Cited
US2432093A
Cited
US2512849A
Cited
US2640877A
Cited
US2531447A
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 |