US2738503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse echo altimeter with sensitivity time control
Assignee: RCA Corp
•
Filing: 1949-02-26
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Granted: 1956-03-13
•
Expires: 1969-02-26
Abstract
No abstract record available.
Inventors
- 👤 Horace C Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:29
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/14; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/34; H; H03; H03G; H03G3/00; H03G3/20; H03G3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2009459A
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US2167492A
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US2249181A
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US2498381A
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US2309314A
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US2423334A
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US2429623A
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US2422074A
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US2439044A
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US2427523A
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US2427366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |