Method for the manufacture of plates, filter plate, and suction drier
CA 1316462 C · Owner: Valmet Oy · Inventors: Hindstrom, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for the manufacture of a plate, in which a gypsum mould is first filled with casting mix. Hereinafter water is absorbed out of the casting mix into the gypsum, and a crust is allowed to remain on the face of the mould. The crust is allowed to develop to appropriate thickness whereupon the excess casting mix is poured off. After the inside faces of the crust have become dry, the mould is filled with a granular material, which has preferably the same composition as that of the crust material. The invention also concerns a filter plate, which comprises a space placed between filter faces and filled with a granular material. The invention further concerns a …
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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 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 20, 2010.
- 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.