Patent US2512438A successfully refreshed from Google Patents.
US2512438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal speed changer
Assignee: Individual
•
Filing: 1946-07-24
•
Granted: 1950-06-20
•
Expires: 1966-07-24
Abstract
No abstract record available.
Inventors
- 👤 Ranxi Ubaido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:47
CPC Classifications
F; F16; F16D; F16D67/00; F16D67/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1350018A
Cited
GB361289A
Cited
US1887610A
Cited
US2038613A
Cited
US2191320A
Cited
US2253877A
Cited
US2448824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |