Expired Canadian patentCanada
Method of constructing cylindrical structure such as chimney and hoisting device used in said method
CA 952675 A · Owner: Mitsubishi Jukogyo Kabushiki Kaisha · Inventors: Kimoto, Ken-Ichiro; Togiya, Akiyoshi; Kakuda, Satoshi
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 August 13, 1974. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 1991.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedAugust 13, 1974
Term endedAugust 13, 1991
Patent numberCA 952675 A
Classification (IPC)E04B
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.