Smoke retardant vinyl chloride and vinylidene chloride polymer compositions
CA 1063788 A · Owner: B.F. Goodrich Company (The) · Inventors: Dickens, Elmer D. (Jr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Smoke retardant vinyl chloride and vinylidene chloride polymer compositions are obtained by including therein a synergistic mixture of (A) at least one nickel compound selected from the group consisting of NiCO3 and nickel citrate and (B) at least one zinc compound selected from the group consisting of ZnO and ZnTiO3. Substantial smoke retardation is also obtained by including the above nickel compounds or zinc compounds individually in the vinyl chloride or vinylidene chloride polymer compositions except, for ZnO.
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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 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 9, 1996.
- 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.