US2045500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic gear shifting device
Assignee: RALPH K ROTHROCK
•
Filing: 1934-09-01
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Granted: 1936-06-23
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Expires: 1954-09-01
Abstract
No abstract record available.
Inventors
- 👤 Thurber Edward John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:32
CPC Classifications
B; B60; B60W; B60W30/00; B60W30/18; B60W30/19; B60W10/00; B60W10/02; B60W10/10; B60W2540/00; B60W2540/14; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19242; Y10T74/19247; Y10T74/19251; Y10T74/19256; Y10T74/1926; Y10T74/19265
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) | 1939-06-23 | 1939-12-23 | 1940-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-06-23 | 1943-12-23 | 1944-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-06-23 | 1947-12-23 | 1948-06-23 | $7700.00 | Window Closed / Lapsed |