US2534862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio ranging system with selective automatic volume control and range following
Assignee: AT&T Inc
•
Filing: 1942-06-23
•
Granted: 1950-12-19
•
Expires: 1962-06-23
Abstract
No abstract record available.
Inventors
- 👤 Fox Arthur Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:44
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/66; G01S13/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR853994A
Cited
US1924174A
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US2055883A
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US2143035A
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US2208422A
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US2433838A
Cited
US2300189A
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US2288434A
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US2403975A
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US2455673A
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US2416088A
Cited
US2407898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |