Expired Canadian patentCanada
Lost foam process for casting stainless steel
CA 2103087 C · Owner: The Babcock & Wilcox Company · Inventors: Hand, Bryan
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lost foam process for forming low carbon stainless steel parts is disclosed utilizing a high vacuum during the pouring stage of the lost foam process.
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 15, 1993 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2015.
- 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 15, 1993
GrantedMarch 30, 1999
Term endedNovember 15, 2013
Patent numberCA 2103087 C
Classification (IPC)B22C9/04 +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.