Flame retardant polypropylene resin composition
CA 2013657 C · Owner: Tabata, Nobuchika · Inventors: Tabata, Nobuchika; Fukazawa, Tooru; Akitaya, Shinichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present flame retardant compositions of polypropylene resin contains polypropylene as a principal constituent and the following constituents making a total of 100 wt%: (A) silane coupling agent and/or (D) olefinic synthetic rubber, (B) ammonium polyphosphate or melamine-modified ammonium polyphosphate and (C) one or, more nitrogen organic compounds which are producible nonflammable gas products and carbonaceous residues by the pyrolysis of the mixture. Further, the other compositions of polypropylene resin contains (E) polyethylene resin along with the above constituents making a total of 100 wt%. Moreover the other compositions contains ( E) polyethylene resin, and (F) crosslinking …
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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
- Filed April 2, 1990 and granted December 3, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2012.
- 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
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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.