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US2877429A
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High frequency wave translating device
Assignee: Lockheed Martin Corp
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Filing: 1955-10-06
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Granted: 1959-03-10
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Expires: 1975-10-06
Abstract
No abstract record available.
Inventors
- 👤 Donald J Sommers
- 👤 William J Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:59
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/18; H01P; H01P5/00; H01P5/08; H01P5/10; H01P5/107; H01Q13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2574433A
Cited
US2654842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |