US2153997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed varying mechanism
Assignee: Individual
•
Filing: 1935-08-15
•
Granted: 1939-04-11
•
Expires: 1955-08-15
Abstract
No abstract record available.
Inventors
- 👤 Verderber Joseph
- 👤 Elmer F Batterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:14
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/02; F16H47/04; F16H61/00; F16H61/02; F16H61/0262; F16H2708/00; F16H2708/10; F16H2708/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-04-10 | 1942-10-10 | 1943-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-10 | 1946-10-10 | 1947-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-10 | 1950-10-10 | 1951-04-11 | $7700.00 | Window Closed / Lapsed |