Expired Canadian patentCanada
Method and apparatus for producing electrical steel core laminations
CA 1316434 C · Owner: Ludkovsky, Gregory · Inventors: Ludkovsky, Gregory
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Core laminations are stamped from electrical steel strip and stress annealed by induction heating in a closed tubular chute inclined downwardly from the stamping press. A preselected, non-ambient atmosphere is maintained within the chute.
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 April 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 20, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 8, 1989
GrantedApril 20, 1993
Term endedApril 20, 2010
Patent numberCA 1316434 C
Classification (IPC)C21D1/42 +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.