Polyurethane molding composition method and article
CA 2042376 A1 · Owner: Cabot Safety Intermediate Corporation · Inventors: Seville, Alan R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high pressure method of molding polyurethane articles is described. A polyurethane material is formed from a cross-linkable polymer comprising the reaction product of a polyol and polyisocyanate said polymer, containing a high activation temperature catalyst and a high surface area filler. The material is processed to a gum state suitable for high pressure molding. The material and process are particularly suitable for forming small, intricately shaped articles. Such articles are also described. DCl-9654
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 September 28, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 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
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.