US4108230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire studs
Assignee: Dunlop Ltd
•
Filing: 1976-06-28
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Granted: 1978-08-22
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Expires: 1996-06-28
Abstract
Abstract A tire stud comprises a cylindrical body portion having embedded in one end and protruding therefrom a cylindrical tip of hard wearing material for engaging a road surface. The stud is designed to reduce road surface damage without significantly affecting the grip of the stud on the road surface.
Inventors
- 👤 Robert Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:29
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/14; B60C11/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A tire stud having a body of circular cross-section with a maximum radius r of 0.00275 meter ± 0.0005 meter, said body having a tip portion embedded in one end of said body and protruding above said body by a distance b of 0.00125 meter ± 0.00025 meter, said tip portion having a circular cross-section with a radius r 1 of 0.0015 meter ± 0.0002 meter, said stud having an overall length L of 0.010 meter ± 0.0005 meter, and being dimensioned such that the expression ##EQU3## lies between the limits 3.3 × 10 5 and 8.2 × 10 5 where: ##EQU4##
Claim 2
Dependent Claim
102 words
A tire stud having a body of circular cross-section with a maximum radius r of 0.00275 meter ± 0.0005 meter, said body having a tip portion embedded in one end of said body and protruding above said body by a distance b of 0.00125 meter ± 0.00025 meter, said tip portion having a circular cross-section with a radius r 1 of 0.0015 meter ± 0.0002 meter, said stud having an overall length L of 0.010 meter ± 0.0005 meter, and being dimensioned such that the expression ##EQU3## lies between the limits 3.3 × 10 5 and 8.2 × 10 5 where: ##EQU4##
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |