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Patent US2419999A successfully refreshed from Google Patents.
US2419999A
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Orienting mechanism for pulse echo systems
Assignee: RCA Corp
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Filing: 1942-07-27
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Granted: 1947-05-06
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Expires: 1962-07-27
Abstract
No abstract record available.
Inventors
- 👤 George W Leck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:36
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/02; H01Q3/08; F; F16; F16M; F16M11/00; F16M11/02; F16M11/04; F16M11/06; F16M11/12; F16M11/121; F16M11/123; F16M11/125; F16M11/14; F16M11/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US503602A
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US1654067A
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DE487861C
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US2003661A
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US2151549A
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US2231929A
Cited
US2257320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |