N-substituted tetrahalophthalimides as flame retardants
CA 1066293 A · Owner: Velsicol Chemical Corporation · Inventors: Albright, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are novel compounds of the formula wherein each X is independently selected from chlorine or bromine R is alkylenehaving from 1 to 6 carbon atoms each R' is independently selected from an alkyl or haloalkyl group having from 2 to 6 carbon atoms and n is 1 to 3. The above compounds are effective flame retardants in flammable polymeric compositions.
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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 November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 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.