Expired Canadian patentCanada
Segregation-free metallurgical powder blends using polyvinyl pyrrolidone binder
CA 2030366 C · Owner: Gosselin, Francis · Inventors: Gosselin, Francis
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved metallurgical powder composition of a ferrous powder and at least one of an alloying powder a lubricant or other additive. Lining, dusting and/or segregation of the composition is prevented by use of a polyvinyl pyrrolidone binding agent.
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 November 20, 1990 and granted July 7, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 20, 1990
GrantedJuly 7, 1998
Term endedNovember 20, 2010
Patent numberCA 2030366 C
Classification (IPC)B22F1/00 +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.