US2520537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical high-speed operating gear
Assignee: Individual
•
Filing: 1947-01-02
•
Granted: 1950-08-29
•
Expires: 1967-01-02
Abstract
No abstract record available.
Inventors
- 👤 Forman Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:19
CPC Classifications
F; F02; F02M; F02M51/00; F02M51/06; F02M51/061; F02M51/0614; F02M51/0617; F02M51/0621; F02M51/0625; F02M51/0635; F02M51/0642; F02M51/0653; F02M51/0657; F02M51/0664; F02M51/0667; H; H01; H01F; H01F29/00; H01F29/14; H01F29/143; H01F7/00; H01F7/06; H01F7/08; H01F7/18; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8765; Y10T83/8768
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US390802A
Cited
US2086913A
Cited
US2077259A
Cited
US2018159A
Cited
US2363753A
Cited
US2425767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |