US2965894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Altitude control system
Assignee: AT&T Inc
•
Filing: 1956-12-26
•
Granted: 1960-12-20
•
Expires: 1976-12-26
Abstract
No abstract record available.
Inventors
- 👤 James F Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:07
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/933; G01S13/935; G01S7/00; G01S7/02; G01S7/40; G01S7/4004; G01S7/4026; G01S7/4034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2574853A
Cited
US2630283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |