Mill stone
CA 1237709 A · Owner: Hausmuhlenbau Gesellschaft M.B.H · Inventors: Green, Oswald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a mill, the mill stone (1) of natural or sythetic stone, is pro-, vided with a depression (4) on the grinding surface said depression ex-, tending radially from the central opening (3). Viewed from the side the de-, pression (4) is wedge-shaped. There is either only one depression (4) provided or, in the event that a plurality of such depressions is provided these do not border on each other, but there is in each instance a plain hub area (15) between two such depressions. This fact results in a cooler grinding process.
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 June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
- 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.