Adhesion of aramid cord to rubber
CA 2022148 A1 · Owner: Bauer, Richard George · Inventors: Burlett, Donald James; Bauer, Richard George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method of improving the adhesion between an aramid cord and sulfur vulcanized rubber comprising (a) treating the aramid cord with a copolymer of the structural formula: wherein w is an integer of from 1 to 100 y is an, integer of from 10 to 500; z is an integer of from 1 to 120; X is:, , , , or mixtures thereof; B is: , , or mixtures thereof; wherein R is selected from the group consisting of H, C1 or CH3; and, (b) vulcanizing a composite of the treated cord and rubber.
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 July 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 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.