Patent US2117806A successfully refreshed from Google Patents.
Patent US2561345A successfully refreshed from Google Patents.
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
2026-10-23 17:51
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S1/00; G01S1/02; G01S1/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US894886A
Cited
US1874196A
Cited
US1924174A
Cited
US2011381A
Cited
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 |