Expired Canadian patentCanada
Antioxidant
CA 1337992 C · Owner: Senju Pharmaceutical Co. Ltd. · Inventors: Yoshida, Kenichi; Uehara, Keiichi; Ogata, Kazumi
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antioxidant composed of a diester of phosphoric acid with tocopherol and ascorbic acid or a salt thereof.
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 January 23, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2013.
- 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 9, 1989
GrantedJanuary 23, 1996
Term endedJanuary 23, 2013
Patent numberCA 1337992 C
Classification (IPC)A23L3/34 +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.