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Patent US3166141A successfully refreshed from Google Patents.
US3166141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor
Assignee: Individual
•
Filing: 1960-07-15
•
Granted: 1965-01-19
•
Expires: 1980-07-15
Abstract
No abstract record available.
Inventors
- 👤 Morton K Shields
- 👤 Russell K Shields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:06
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/04; B62D53/08; B62D53/0857; B62D53/0864; B62D49/00; B62D49/005; B62D49/007; B62D51/00; B62D51/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A TRACTOR COMPRISING: A CHASSIS; A FIRST CASTER-TYPE WHEEL MOUNTED ON ONE END OF SAID CHASSIS; A DRIVEN WHEEL MOUNTED ON EACH SIDE OF SAID CHASSIS, SAID DRIVEN WHEELS BEING FIXED TO SHAFTS IN POSITIONS TO ROTATE IN RESPECTIVE LONGITUDINAL PLANES; POWER MEANS INCLUDING A MECHANICAL DIFFERENTIAL MOUNTED ON SAID CHASSIS FOR ROTATING SAID DRIVEN WHEELS; A U-SHAPED MEMBER HAVING LEGS EXTENDING TOWARD BOTH SAID FIRST CASTER-TYPE WHEEL AND SAID DRIVEN WHEELS IN AN APPROXIMATELY HORIZONTAL PLANE, SAID U-SHAPED MEMBER HAVING THE ENDS OF ITS LEGS MOUNTED ON SAID CHASSIS TO ROTATE ABOUT A HORIZONTAL TRANSVERSE AXIS; A SECOND CASTER-TYPE WHEEL SUSPENDED FROM THE
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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) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |