US2479445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-speed transmission
Assignee: Elwell Parker Electric Co
•
Filing: 1946-06-12
•
Granted: 1949-08-16
•
Expires: 1966-06-12
Abstract
No abstract record available.
Inventors
- 👤 Henry F Wilms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:29
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/46; F16H3/48; F16H3/52; F16H3/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE128940C
Cited
GB190209111A
Cited
US802175A
Cited
US924323A
Cited
US958797A
Cited
US1167718A
Cited
US1540247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |