US2843318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth ellipticity corrector for dead reckoning computer
Assignee: General Precision Laboratory Inc
•
Filing: 1955-03-15
•
Granted: 1958-07-15
•
Expires: 1975-03-15
Abstract
No abstract record available.
Inventors
- 👤 John W Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:28
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/78; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2406836A
Cited
US2588763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |