Expired Canadian patentCanada
Method for the preparation of nodular or vermicular cast iron samples
CA 1088753 A · Owner: Heraeus Electro-Nite Co. · Inventors: Plessers, Jacques J.
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 sample of nodular or vermicular cast iron has magnesium and/or cerium atoms therein neutralized by the addition of selenium or sulphur in the presence of tellurium.
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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 November 4, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 4, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 8, 1977
GrantedNovember 4, 1980
Term endedNovember 4, 1997
Patent numberCA 1088753 A
Classification (IPC)C22C33/08 +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.