Graft copolymer and process for making same
CA 1105178 A · Owner: Milchem Incorporated · Inventors: Elting, Katherine A.C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reaction process and product obtained thereby said, process comprising reacting a polymerizable monomeric compound containing a polymerizably reactive vinyl group such as methyl, methacrylate, acrylonitrile vinyl acetate, or the like, in an, aqueous medium at a pH not greater than about 3.5 in the presence of a ceric salt which is soluble in at least one component of said medium, and an inorganic substrate such as a clayey sub-, strate, e.g. montmorillonite or the like, capable of initiating, polymerization of said monomeric compound wherein said inorganic, substrate is a reducing agent for said reaction. - 1 -
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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
- Granted July 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 1998.
- 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.