Patent US3606920A successfully refreshed from Google Patents.
US3606920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed sensitive dual tread tire
Assignee: Individual
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Filing: 1969-04-01
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Granted: 1971-09-21
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Expires: 1989-04-01
Abstract
Abstract A TREADED TIRE OF THE PNEUMATIC TYPE WHICH HAS A LOCALIZED CIRCUMFERENTIAL INCREASED WEIGHT AREA ADAPTED TO INCREASES THE DIAMETER OF A LOCALIZED PORTION OF THE TIRE TREAD DUE TO CENTRIFUGAL FORCE AT HIGH SPEEDS. THE INCREASED DIAMETER PORTION OF THE TREAD REDUCES THE CONTACT AREA BETWEEN THE TIRE AND THE ROAD AT HIGH SPEEDS, THEREBY REDUCING THE DRAG WHILE AT THE SAME TIME REDUCING HEAT AND FRICTION AND PREVENTING HYDROPLANING OF THE TIRE. THE INCREASED DIAMETER PORTION MAY BE CONSTRUCTED OF A LONGER-WEARING MATERIAL THAN THE REMAINDER OF THE TREAD. THE INVENTION DOES NOT INTERFERE WITH FULL TREAD CONTACT AT SLOW SPEEDS OR WHILE BRAKING THE VEHICLE.
Inventors
- 👤 George J Kole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:28
CPC Classifications
B; B60; B60C; B60C11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |