Expired Canadian patentCanada
Stabilized polyolefins and antioxidant therefor
CA 1078875 A · Owner: Ethyl Corporation · Inventors: Shin, Kju H.; Ihrman, Kryn G.; Wollensak, John C.
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 highly effective antioxidant for polyolefins imparting improved resistance to yellowing is di-(3,5-, dicyclopentyl-4-hydroxybenzyl) sulfide.
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 June 3, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 3, 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.
Filed—
GrantedJune 3, 1980
Term endedJune 3, 1997
Patent numberCA 1078875 A
Classification (IPC)C08K5/36 +1 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.