US2471516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plan position indicating system and method
Assignee: AT&T Inc
•
Filing: 1941-12-20
•
Granted: 1949-05-31
•
Expires: 1961-12-20
Abstract
No abstract record available.
Inventors
- 👤 Newton W Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:57
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/22; G01S1/00; G01S1/02; G01S7/10; G01S7/12; G01S7/40; G01S7/4004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR812975A
Cited
FR820350A
Cited
US2231929A
Cited
US2241809A
Cited
US2189549A
Cited
US2313966A
Cited
US2395966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |