Studless tire with radially directed short fibers
CA 2614895 A1 · Owner: Nakagawa, Hiroyuki · Inventors: Nakagawa, Hiroyuki; Hino, Hidehiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A studless tire comprises a tread defining a ground-contacting region, the tread comprising at least a diene rubber and nonmetallic short fibers oriented in the tire radial direction. The tire profile satisfies the following equation 1> TW/S > 0.92 - 0.17 X A, wherein TW is the ground-contacting width of the tire; S is the section width of the tire; and A is the tire aspect ratio. In the ground-contacting region at least one circumferential rib , of which total axial width is 15 to 30 % of the ground-contacting width TW may be disposed. The ground-contacting face of the tread may be provided on at least 80 % of its area with unevenness molded by a tire vulcanizing mold so as to have a …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 31, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 31, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.