US2581589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position indicating system
Assignee: RCA Corp
•
Filing: 1946-12-12
•
Granted: 1952-01-08
•
Expires: 1966-12-12
Abstract
No abstract record available.
Inventors
- 👤 Philip J Herbst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:37
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/785; G01S3/786; G01S3/7864; G01S5/00; G01S5/0009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1470696A
Cited
US2166712A
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US2201978A
Cited
US2209507A
Cited
US2409448A
Cited
US2403975A
Cited
US2412612A
Cited
US2428946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |