Method of molding concrete
CA 1048240 A · Owner: G. Matthews Research And Development Co. Limited · Inventors: Matthews, Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method of and an apparatus for making a casting from a mass of dry particulate material and a liquid which co-acts with the dry material. It is particularly, though not exclusively, concerned with the production of concrete castings. In the method negative pressure is applied over a first portion of the surface of the dry particulate material, e.g. over one side of the material and, liquid is distributed over a second portion of that surface, e.g. over the opposite side of the dry material. The negative pressure causes the particulate material to be compacted and draws the liquid into the particulate material.
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 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 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.