Flameproof compositions
CA 1054314 A · Owner: Crown Zellerbach International · Inventors: Allen, Barrington T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Paper made from a blend of synthetic polymer fibers and cellulosic fibers can be made flameproof by incorporating into the polymer a conventional flame retardant system consisting of organically-bonded chlorine or bromine and a synergist, such as antimony oxide and, in addition, by applying to the paper a sizing containing the same or a different synergist.
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 May 15, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 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.