Patent US2807340A successfully refreshed from Google Patents.
US2807340A
Expired / Lapsed
US
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Change-speed gears for automobiles
Assignee: Individual
•
Filing: 1953-03-20
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Granted: 1957-09-24
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Expires: 1973-03-20
Abstract
No abstract record available.
Inventors
- 👤 Butterworth Archibald James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:00
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/08; F16H63/16; F16H63/04; F16H59/00; F16H59/02; F16H2059/0234; F16H2059/0239; F16H3/00; F16H3/02; F16H3/08; F16H3/083; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19442; Y10T74/19451; Y10T74/19465; Y10T74/20; Y10T74/20012; Y10T74/20018; Y10T74/20055; Y10T74/20061; Y10T74/20189
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |