Flame proofing polymers with tri-esters of phosphorus and a haloalkylarylether
CA 1114538 A · Owner: Sandoz Ltd. · Inventors: Drake, William O.; Finck, Hans-Werner; Mayerhofer, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flameproofing composition comprises an 0,0,0triester of phosphorous, phosphoric or thiophosphoric acid and a haloalkyl aryl ether, and optionally a chlorinated aliphatic hydrocarbon and/or an organic tin or lead compound. The composition is useful for flameproofing polymeric organic materials, especially synthetic polymeric organic materials, such as polypropylene which may, alternatively be flameproofed by treatment separately with the individual components of the composition.
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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 December 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1998.
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Timeline
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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.