Patent US2339087A successfully refreshed from Google Patents.
US2808739A
Expired / Lapsed
US
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Control for differential drive
Assignee: Individual
•
Filing: 1953-04-03
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Granted: 1957-10-08
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Expires: 1973-04-03
Abstract
No abstract record available.
Inventors
- 👤 Mueller Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:06
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/27; F16H48/06; F16H48/08; F16H48/38; F16H48/42; F16H2048/423; F16H48/40
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |