Moisture cross-linking of polymers
CA 2023948 A1 · Owner: Harbourne, David Alan · Inventors: Harbourne, David Alan; Boocock, John Roger Brooke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A concentrate comprising a copolymer and 65 to 300% by weight of the copolymer, of a vinyl silane is disclosed. The vinyl silane is vinyl trimethoxysilane and/or vinyl triethoxysilane. The copolymer is a copolymer of ethylene with at least one comonomer selected from the group consisting of carbon monoxide vinyl, acetate, alkyl acrylates and alkyl methacrylates in which, the alkyl groups have 1-4 carbon atoms. The copolymer is in a particulate form and has a heat of crystallization of less than 70 J/g, and if said copolymer is ethylene/vinyl acetate copolymer, then the copolymer has a vinyl acetate content of at least 18% by weight. The concentrate is maintained in a moisture-free …
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 August 24, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 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.