US2835131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Navigating systems for dirigible craft
Assignee: Unisys Corp
•
Filing: 1952-12-23
•
Granted: 1958-05-20
•
Expires: 1972-12-23
Abstract
No abstract record available.
Inventors
- 👤 Vacquier Victor
- 👤 Robert B Blizard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:43
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0202; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/166; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221; Y10T74/1225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1969965A
Cited
DE530260C
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US2109283A
Cited
US2414291A
Cited
GB654658A
Cited
US2566305A
Cited
US2577313A
Cited
US2729107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |