Hydrolytically stable urethane foam precursors
CA 1050699 A · Owner: M And T Chemicals Inc. · Inventors: Gitlitz, Melvin H.; Treadwell, Kenneth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flexible and rigid polyurethane foams are obtained using as the gel catalyst specified di- and triorganotin compounds wherein the hydrocarbon radicals bonded to the tin atom are methyl or methoxymethyl radicals. These catalysts are at least comparable in performance to prior art catalysts and offer the additional advantage of forming stable aqueous solutions. -1-
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 March 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 1996.
- 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.