Expired Canadian patentCanada
Saw blade
CA 2004703 C · Owner: Nakahara, Katsumi · Inventors: Okada, Hiroyuki; Nakahara, Katsumi
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a saw blade used, for example, with a hack saw, circular saw or band, saw, and, in particular, to a saw blade whereby deviation of the cut and noise can be restrained during the cutting of the workpiece.
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
- Filed December 6, 1989 and granted August 25, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 6, 1989
GrantedAugust 25, 1998
Term endedDecember 6, 2009
Patent numberCA 2004703 C
Classification (IPC)B27B33/02 +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.