Poly (phosphazene) vulcanizates and foams
CA 1080400 A · Owner: Firestone Tire And Rubber Company (The) · Inventors: Thompson, James E.; Sicka, Richard W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to fire-resistant polyphosphazene polymers which exhibit a high degree of flame retardancy and which do not generate, large amounts of smoke or toxic products when ignited or exposed to relatively high temperatures. More specifically, it relates to low density polyphosphazenes as foams and coating materials with outstanding thermal stability and to vulcanizable compositions of poly(phosphazenes) and insulating foams made therefrom. Additionally, the invention provides a process for the preparation of fire retardant, low smoking, thermally stable oil resistant vulcanizates and closed cell foams which are made from the poly(phosphazenes) polymers described above. To …
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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 24, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 1997.
- 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.