US3666020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drags for snowmobile trails
Assignee: Individual
•
Filing: 1970-11-18
•
Granted: 1972-05-30
•
Expires: 1990-11-18
Abstract
Abstract Apparatus for leveling and conditioning snowmobile trails having a substantially rigid elongate frame assembly and a series of resilient snow gathering and distributing scoops formed from sectors of pneumatic tire casings depending from the frame.
Inventors
- 👤 Robert V Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:31
CPC Classifications
E; E01; E01H; E01H4/00; E01H4/02; A; A01; A01B; A01B31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A drag for snowmobile trails comprising: a. a substantially rigid elongate frame assembly, and b. A series of resilient snow leveling scoops each comprising an arcuate sector of at least about 90* and not more than about 180* of a pneumatic tire casing divided through the bottom tread portion thereof along a plane extending transversely to the axis of Said tire casing, said series of snow leveling scoops being spaced along the length of said frame assembly with the sidewall portion of each of said sectors of tire casings forming said snow leveling scoops secured to the underside of said frame assembly and having the bottom tread portion extending in depending relation from the rear edge of said sidewall portion.
Claim 2
Dependent Claim
120 words
A drag for snowmobile trails comprising: a. a substantially rigid elongate frame assembly, and b. A series of resilient snow leveling scoops each comprising an arcuate sector of at least about 90* and not more than about 180* of a pneumatic tire casing divided through the bottom tread portion thereof along a plane extending transversely to the axis of Said tire casing, said series of snow leveling scoops being spaced along the length of said frame assembly with the sidewall portion of each of said sectors of tire casings forming said snow leveling scoops secured to the underside of said frame assembly and having the bottom tread portion extending in depending relation from the rear edge of said sidewall portion.
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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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |