Modified rubber polymer latex
CA 2284180 A1 · Owner: Subramaniam, Nadaraja · Inventors: Monteiro, Michael John; Balic, Robert; Gilbert, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Modification of polymers of the type including carbon/carbon double bonds is disclosed wherein the polymerisation of at least one monomer of low water solubility within a pre-existing polymer latex yields material containing interlinked polymers. The process includes the steps of (a) taking or making a colloidal dispersion of the polymer in an aqueous medium (b) swelling the , polymer in the colloidal particles with at least one polymerisable monomer having a solubility in water of less than 10-3 molar; and (c) inducing a freeradical polymerisation of the monomer(s) within the swollen colloidal particles of the polymer. The process is particularly appropriate to preparation of …
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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 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2020.
- 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.