Patent US2639210A successfully refreshed from Google Patents.
US2639210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording decelerometer
Assignee: Individual
•
Filing: 1948-08-24
•
Granted: 1953-05-19
•
Expires: 1968-08-24
Abstract
No abstract record available.
Inventors
- 👤 Alexander F Robertson
- 👤 John R Tallackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:37
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/09; G01P15/0907; G01P1/00; G01P1/12; G01P1/127
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2169726A
Cited
US2163847A
Cited
US2225381A
Cited
US2178471A
Cited
US2360639A
Cited
US2371626A
Cited
US2411401A
Cited
US2501352A
Cited
US2527562A
Cited
US2441162A
Cited
US2488586A
Cited
US2428369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |