Patent US2728902A successfully refreshed from Google Patents.
US2728902A
Expired / Lapsed
US
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Apparatus for supersonic ranging and detection
Assignee: Individual
•
Filing: 1950-08-01
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Granted: 1955-12-27
•
Expires: 1970-08-01
Abstract
No abstract record available.
Inventors
- 👤 Harry B White
- 👤 Maurice D Stahl
- 👤 Jack E Duff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:07
CPC Classifications
G; G10; G10K; G10K1/00; G10K1/06; G10K1/062; G10K1/066; G10K1/067; G01; G01S; G01S1/00; G01S1/72; Y; Y10; Y10S; Y10S116/00; Y10S116/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1858931A
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US2033160A
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US2016907A
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US2233992A
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US2433361A
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US2371988A
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US2507746A
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US2405182A
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US2571409A
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US2498990A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |