Pneumatic tires
CA 1265732 C · Owner: Bridgestone Corporation · Inventors: Yahagi, Mitsuhisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Pneumatic tires particularly tires for heavy, load vehicles are disclosed. In the tire of this type the tread rubber is divided into three rubber portions o-f central and either side regions in the direction of rotational aixs of the tire. As the material of the tread rubber, the central region uses a rubber having a good cut resistance, while the either side region uses a rubber having a good wear resistance.
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 February 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 2007.
- 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.