US2438904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing system
Assignee: STC PLC
•
Filing: 1942-11-23
•
Granted: 1948-04-06
•
Expires: 1962-11-23
Abstract
No abstract record available.
Inventors
- 👤 Rosa Louis A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1908249A
Cited
US2009459A
Cited
US2103090A
Cited
US2167492A
Cited
US2138138A
Cited
US2264369A
Cited
US2419590A
Cited
US2422204A
Cited
US2422205A
Cited
US2423304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |