Patent US2561235A successfully refreshed from Google Patents.
US2561235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam released clutch for grain drills
Assignee: JOHN DEERE VAN BRUNT CO
•
Filing: 1946-05-23
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Granted: 1951-07-17
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Expires: 1966-05-23
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Schmutzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:39
CPC Classifications
F; F16; F16D; F16D11/00; F16D11/08; F16D11/10; A; A01; A01C; A01C7/00; A01C7/08; A01C7/10; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20882
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1625769A
Cited
US795808A
Cited
US814070A
Cited
US836685A
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GB191116981A
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US1093827A
Cited
US1294496A
Cited
US1438486A
Cited
US1405001A
Cited
DE482397C
Cited
US1904563A
Cited
US2336099A
Cited
US2332743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |