Patent US2908902A successfully refreshed from Google Patents.
US2908902A
Expired / Lapsed
US
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World-wide navigational system
Assignee: General Precision Laboratory Inc
•
Filing: 1954-02-17
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Granted: 1959-10-13
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Expires: 1974-02-17
Abstract
No abstract record available.
Inventors
- 👤 John W Gray
- 👤 Everett B Hales
- 👤 Jr Ivan A Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:03
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/183; G01C21/188; G01C21/20; G06; G06G; G06G7/00; G06G7/48; G06G7/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2669710A
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US2744683A
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US2699612A
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US2781168A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |