Rigid polyvinyl chloride compositions with high heat-deflection temperature
CA 1079889 A · Owner: Fmc Corporation · Inventors: Thomas, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyvinyl chloride compositions with heat-deflection temperatures of above 100°C are obtained by combining suspension grade polyvinyl chloride with diallyl phthalate with or without an unsaturated polyester and appropriate, polymerization catalysts for the diallyl phthalate incorportating into the polymer and polymerizable additive high loadings of ground limestone, from about 40% to about 100% of the total weight of final polymer, and conventional stabilizers for polyvinyl chloride.
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
- Granted June 17, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 1997.
- 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.