Composite and durable forming model with permeability
CA 1266159 C · Owner: Hayashi, Yoshikazu · Inventors: Yanagisawa, Akira; Fuma, Toyoji; Tsuchida, Masanobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Composite models are used for forming into predetermined shapes and are provided with durability for repeated use and excellent permeability. The aggregates are ferrous or non ferrous metallic grains and ceramic grains, to which a binder containing an evaporating or consumable substance is added and kneaded, and sintered. The model has a close hardened layer scattered with metallic oxides on at least an outer shell. The hardened layer has fine air vents in its thickness. The whole body of a model is 5 to 60% of porosity and more than 100 Kg/cm of compression strength.
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 February 27, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 27, 2007.
- 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.