Expired Canadian patentCanada
Color pigment for use in the production of thermoplastic articles
CA 1184330 A · Owner: Elkem Metals Company · Inventors: Salensky, George A.; Ealer, George E.; Chopra, Kuldip S.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Manganese oxide or a material containing manganese oxide as its principle ingredient is used as a color pigment in the production of thermoplastic articles and particularly thermoplastic films.
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 March 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 12, 1981
GrantedMarch 19, 1985
Term endedMarch 19, 2002
Patent numberCA 1184330 A
Classification (IPC)C08K3/22 +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.