Polyisocyanate mixture
CA 1314341 C · Owner: Jasenak, James R. · Inventors: Jasenak, James R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo-2953, PU-241, NOVEL POLYISOCYANATE MIXTURE ABSTRACT OF THE DISCLOSURE, The present invention is directed to a novel isocyanate mixture and the use thereof in producing a flexible polyurethane foam. The polyisocyanate mixture comprises, a) from 73 to 77 % by weight of methylene bis(phenylisocyanate), said methylene, bis(phenylisocyanate) having an isomer content as follows:, i) from about 30 to about 34 ~ by weight of the 2,4' isomer, ii) from about 60 to about 66 % by weight of the 4,4'- isomer, and, iii) from about 3 to about 7 % by weight the, 2,2' isomer, the percent of said isomers totaling 100%, b) from 23 to 27 % by weight of higher functional methylene-bridged polyphenyl …
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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 March 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 9, 2010.
- 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.