Heavy duty pneumatic radial tires
CA 1195599 A · Owner: Bridgestone Tire Company Limited · Inventors: Ura, Yasuyuki; Miyamoto, Kenji; Makino, Shigeo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heavy duty pneumatic radial tire is disclosed which comprises a tread divided into a plurality of island parts by at least two main grooves continuously extending in the circumferential direction of the tire. In this tire the main groove consists of an outer, groove portion opening at its both upper edges each, extending zigzag in the circumferential direction of the tire to an outer surface of the tread and an inner groove portion being inwardly adjacent to the outer groove portion in the radial direction of the tire and extending substantially in parallel to the circumferential direction of the tire together with both edges each defining a boundary to said outer groove portion and 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
- Granted October 22, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2002.
- 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.