US1421639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed-changing mechanism
Assignee: Individual
•
Filing: 1920-02-24
•
Granted: 1922-07-04
•
Expires: 1940-02-24
Abstract
No abstract record available.
Inventors
- 👤 William I Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:58
CPC Classifications
B; B60; B60W; B60W30/00; B60W30/18; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W2710/00; B60W2710/10; B60W2710/1005; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/1926; Y10T74/19265
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1925-07-03 | 1926-01-02 | 1926-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-07-03 | 1930-01-02 | 1930-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-07-03 | 1934-01-02 | 1934-07-04 | $7700.00 | Window Closed / Lapsed |