Foundry core mix
CA 1075845 A · Owner: International Minerals And Chemical Corporation · Inventors: Holik, Melville J.; Kraemer, John F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention as disclosed provides a foundry core mix adapted to being cured by a catalyst comprising a foundry aggregate and about 1% to 5% by weight of the aggregate of a binder comprising in admixture: (a) a curable resin base of the group cosisting of epoxy resins polyester, resins, alkyd resins and squeous phenol-formaldehyda resins (b) a, reactive liquid polyisocyanate in the amount of 80% to 125% by weight of the resin base, and (c) a solvant of the formula, in which R1 and R2 are the same or different hydrocarbon radicals of three to six carbon atoms and R3 and R4 are the same or different hydrogen, methyl, ethyl or phenyl radicals in an amount of from about 10% to 40% by …
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 April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 1997.
- 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.