US2433368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide construction
Assignee: Sperry Gyroscope Co Inc
•
Filing: 1942-03-31
•
Granted: 1947-12-30
•
Expires: 1962-03-31
Abstract
No abstract record available.
Inventors
- 👤 Montgomery H Johnson
- 👤 Jr William H Ratliff
- 👤 William W Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:52
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1926807A
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US2206923A
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US2206683A
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US2241119A
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US2129669A
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US2253501A
Cited
US2238770A
Cited
US2207845A
Cited
US2273447A
Cited
US2234293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |