Elastomers and tyres containing them
CA 1301389 C · Owner: Luijk, Pieter · Inventors: Broekhuis, Antonius Augustinus; Stamhuis, Jan Evert; Luijk, Pieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An elastomeric composition suitable for tyres comprising (A) 5 to 50% by weight of copolymer block (A) of an aromatic vinyl compound and a conjugated diene and containing 52-90% wt of vinyl compound and having an average mol. wt. > 20,000 and a vinyl content in the diene units of < 20% wt and, (B) 95-50% by weight of a block (B) which is a homopolymer of a conjugated diene or a copolymer block of an aromatic vinyl compound and a conjugated diene, block (B) containing < 20 wt. of aromatic vinyl compound and having a Tg < -40 °C after vulcanization blocks (A) and (B) being incompatible. EJRHO4
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 May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
- 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.