Metal-2-mercaptobenzothiazoles, metal-2- mercaptobenzoxazoles, and mercaptobenzimidazoles as smoke retardants for polyvinyl halides and polystyrenes
CA 1088690 A · Owner: Atochem North America, Inc. · Inventors: Sandler, Stanley R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Smoke-retardant polymer compositions prepared by admixing a resin consisting of a polyvinyl halide or a polystyrene with a smoke reducing amount of a metal-2-marcaptobenzothiazole, a metal-2-mercaptobenzoxazole or a metal-, 2-mercaptobenzimidazole having the general formula where R ant R1 can be a hydrogen, alkyl aryl, slkylaryl or halogen, X is, elther oxygen sulfur or NR2, M is a metal, n is an integer equal to the valence of the metal and R2 can be a hydrogen alkyl, aryl or alkylaryl group.
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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 October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 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.