Pneumatic radial tire
CA 2012730 C · Owner: Nakagawa, Hidemitsu · Inventors: Koseki, Hiroyuki; Nakagawa, Hidemitsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic radial tire having at least one carcass ply, distal ends of which are folded back axially outwardly about a pair of bead cores to form respective turn-up portions. A hard rubber sheet is disposed on the outer side of each turn-up portion in such a manner as to partially overlap with the same in a mutually spaced-apart relationship, and a soft rubber material which is softer than the hard rubber sheet is interposed between the turn-up portion and the hard rubber sheet, thereby reducing the amount of stress and heat occurring in the vicinity of the end portions of the turn-up portions of the carcass ply.
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 March 21, 1990 and granted April 1, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2012.
- 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.