US2504975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio pulse type distance measuring system
Assignee: STC PLC
•
Filing: 1944-03-13
•
Granted: 1950-04-25
•
Expires: 1964-03-13
Abstract
No abstract record available.
Inventors
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:25
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78; G01S1/00; G01S1/02; G01S1/08; G01S1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1765585A
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GB469417A
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US2165690A
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US2208349A
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US2134716A
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US2287174A
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US2391411A
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US2421248A
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US2359447A
Cited
US2419571A
Cited
US2412111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |