Expired Canadian patentCanada
Phenolic compound and its use as stabilizer for butadiene polymer
CA 1325218 C · Owner: Sasaki, Manji · Inventors: Sasaki, Manji; Yachigo, Shinichi; Takata, Takeshi
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 compound represented by the formula of This compound is useful as a stabilizer for butadiene polymers.
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 December 14, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 15, 1988
GrantedDecember 14, 1993
Term endedDecember 14, 2010
Patent numberCA 1325218 C
Classification (IPC)C07C69/54 +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.