Rubber compositions providing improved rubber-vulcanisate properties
CA 2058727 A1 · Owner: Solutia Europe Nv/Sa · Inventors: Devaux, Albert Firmin Leon Ghislain; Lynch, Eric Royle
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to rubber compositions having improved vulcanisate properties, particularly hardness modulus, and modulus stabilisation. These benefits can be achieved from the addition to the unvulcanised rubber of a narrow and specifically defined class of agents for modifying rubber properties. Such agents are alkanoic acids or salts which include an aromatic moiety.
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 January 3, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 3, 2014.
- 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.