US2561345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position recording system
Assignee: STC PLC
•
Filing: 1945-04-09
•
Granted: 1951-07-24
•
Expires: 1965-04-09
Abstract
No abstract record available.
Inventors
- 👤 Edmond M Deloraine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S1/00; G01S1/02; G01S1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US894886A
Cited
US1874196A
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US1924174A
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US2011381A
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FR813404A
Cited
US2394990A
Cited
US2199634A
Cited
GB552072A
Cited
US2403561A
Cited
US2414265A
Cited
US2236134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |