Polymeric compositions possessing improved flammability resistance
CA 1255431 A · Owner: The Dow Chemical Company · Inventors: Neumann, Fred W.; Corbett, John M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flame retardant polymeric composition comprising a monoalkenyl aromatic polymer having polymerized therein from 5 to 25 mole percent of an imide having appended, to the nitrogen atom a, bromine substituted aliphatic or brominated-aromatic substituted aliphatic hydrocarbon radical. The composition is formed by melt blending a polymer of a monoalkenyl aromatic monomer and an ethylenicallyunsaturated anhydride with a brominated-primary aliphatic amine or brominated-aromatic substituted aliphatic amine. 29,003-F
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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 June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- 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.