Low toxic polyvinylchloride stabilizers
CA 1190731 A · Owner: Dart Industries Inc. · Inventors: Hulyalkar, Ramchandra K.; Hotchandani, Kanayo; Baum, Gerald A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Liquid antimony organic sulfur-containing compounds are rendered stable at ambient conditions by incorporating an effective amount of an ethoxylated organo phosphate ester. The stable liquid compositions contribute to the stability of vinyl halide resins. BACKGROUND OF THE INVENTION, Antimony organic sulfur-containing compounds are well known as stabilizers for vinyl halide resins to guard against degradation by heat during molding and working of the resin into useful articles. Prior art patents which disclose such antimony organic sulfur-containing compounds and their utility as stabilizers include U.S. Pat. Nos. 2,680,726; 2,684,956; 3,340,285; 3,399,220; 3,466,261 and 3,530,158. In past …
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 July 23, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2002.
- 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.