Expired Canadian patentCanada
Disks with blades
CA 1269079 C · Owner: Lotz, Heinrich · Inventors: Lotz, Heinrich
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Slots are sawn into the edges of discs for pumps with a cup saw so as to produce blades having a curved cross-section. The blades may taper inwardly or outwardly or have no taper.
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 May 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 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.
FiledFebruary 28, 1986
GrantedMay 15, 1990
Term endedMay 15, 2007
Patent numberCA 1269079 C
Classification (IPC)B23C3/18 +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.