Use of a pentaerythritol diphosphonate to flame retard polymers
CA 1138142 A · Owner: Borg-Warner Chemicals, Inc. · Inventors: Valdiserri, Leo L.; Cohen, Murray S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flame-retardant polymer compositions containing a pentaerythritol diphosphonate and a halogenated organic compound having at least about 30% halogen. Dimethyl pentaerythritol diphosphonate, i,e. is a preferred ingredient of the composition as is, polypropylene. The diphosphonates of the present invention are wed in polymer compositlons to increase the degree of flnme retardance.
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 December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
- 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.