Mass for production of cores and casting moulds
CA 1093276 A · Owner: Politechnika Warszawska · Inventors: Koszarewski, Zbigniew; Ostaszewski, Wojciech; Peksa, Stanislaw
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Moulding composition or masses for production of cores and casting moulds comprising 100 parts by weight of grain base particularly quartz sand, 0.5-30 parts of alkaline metal hydroxides, 1-40 parts of alkaline metal carbonates 1-15 parts, of water as well as 0.2-10 of known hydrophilic binders. The moulding composition or masses according to the invention is removed from the cast or mould by subjecting the core in the cast or mould to the action of solvent particularly water, preferably by dipping.
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 January 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 13, 1998.
- 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.