Patent US2158373A successfully refreshed from Google Patents.
Patent US2168956A successfully refreshed from Google Patents.
US2168956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Change speed gear for power vehicles
Assignee: P K DRIVE CORP
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Filing: 1937-02-17
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Granted: 1939-08-08
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Expires: 1957-02-17
Abstract
No abstract record available.
Inventors
- 👤 Kohl Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:57
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/664; F16H61/6646
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) | 1942-08-07 | 1943-02-06 | 1943-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-07 | 1947-02-06 | 1947-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-07 | 1951-02-06 | 1951-08-08 | $7700.00 | Window Closed / Lapsed |