Fiber forming copolyester compositions
CA 1052044 A · Owner: Emery Industries · Inventors: Schlossman, Irwin S.; Yau, Chiou C.; Oehlschlaeger, Herman F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flame retardant copolyesters capable of being formed into fibers and filaments and which are thermally stable at temperatures up to 350°C are obtained by condensing a particularly specified diol with a particularly specified dicarboxylic acid and a particular ethoxylated brominated hydroquinone.
Read the whole patent
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 April 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 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.