US2953858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Navigational apparatus
Assignee: Research Corp
•
Filing: 1954-03-05
•
Granted: 1960-09-27
•
Expires: 1974-03-05
Abstract
No abstract record available.
Inventors
- 👤 Wrigley Walter
- 👤 Forrest E Houston
- 👤 Lisle Joseph E De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:35
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/183; G01C21/188; G01C21/166; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1253666A
Cited
US844837A
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US1086242A
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US1685762A
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US2046998A
Cited
US2109283A
Cited
US2242291A
Cited
US2414291A
Cited
US2524756A
Cited
US2591697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |