Patent US2720643A successfully refreshed from Google Patents.
US2720643A
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Radio scanning apparatus
Assignee: Unisys Corp
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Filing: 1946-01-19
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Granted: 1955-10-11
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Expires: 1966-01-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert F Hays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:35
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/295; F; F41; F41G; F41G5/00; F41G5/14; F41G5/16; F41G9/00; F41G9/02; G01S1/00; G01S1/02; G01S7/04; G01S7/06; G01S7/08; G01S7/10; G01S7/40; G01S7/4004; G01S7/4026; G01S7/4034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1384868A
Cited
US1864638A
Cited
US1892431A
Cited
US2407697A
Cited
US2231929A
Cited
US2412612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |