Expired Canadian patentCanada
Grinding means for producing mechanical woodpulp
CA 1267293 C · Owner: Oy Tampella Ab · Inventors: Aario, Matti; Sarkela, Raimo; Haikkala, Pekka
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a grinding means according to the invention such as in a, homogeneous grindstone, in an abrasive layer or segment affixed to the surface of a stone body, the hard abrasive fragments are bonded to each other with a sintered metal.
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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 3, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 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.
FiledOctober 2, 1984
GrantedApril 3, 1990
Term endedApril 3, 2007
Patent numberCA 1267293 C
Classification (IPC)B24D3/06 +2 more
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.