Manufacturing process of spray urethane elastomer
CA 2006725 A1 · Owner: Sakaguchi, Hiroaki · Inventors: Sakaguchi, Hiroaki; Imaoka, Kazuhiro; Ogura, Tetsuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
bstract of the Disclosure, This invention relates to a process for manufacturing a spray urethane elastomer, more particularly to a process for manufacturing a solventless, non-cellular spray urethane elastomer which comprises, spraying a partial prepolymer component having a high molar ratio of NCO/OH prepared from an organic polyisocyanate and from polytetramethylene ether glycol (PTMEG) having a molecular weight of 400 to 2000 and a resin component containing the PTMEG a specified, chain extender and an organobismuth compound catalyst onto a substrate by use of a two components high pressure spray machine. According to the present invention spraying only of the stock, solutions by use of …
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
- Filed December 27, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 27, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2011.
- 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.