Patent US2501885A successfully refreshed from Google Patents.
US2501885A
Expired / Lapsed
US
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Gyroscopic system
Assignee: Individual
•
Filing: 1945-11-20
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Granted: 1950-03-28
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Expires: 1965-11-20
Abstract
No abstract record available.
Inventors
- 👤 Barnes Jeffery Walton
- 👤 Philpot John St Leger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:56
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/44; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1232; Y10T74/1243; Y10T74/1261
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1628136A
Cited
US1518762A
Cited
GB365188A
Cited
US1826013A
Cited
US2041526A
Cited
US1932210A
Cited
US2188606A
Cited
US2427130A
Cited
GB544756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |