Expired Canadian patentCanada
Animal feed compositions and uses of triterpenoid saponin obtained from camellia l. plants
CA 2224663 C · Owner: Zhejiang Agricultural University · Inventors: Zhan, Yong
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 method of promoting growth and improving imumune function of animals is described in the present invention, in which a bioactive agent extracted from seed, cake is used as feed additive.
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
- Filed August 16, 1996 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 16, 1996
GrantedDecember 30, 2003
Term endedAugust 16, 2016
Patent numberCA 2224663 C
Classification (IPC)A23K1/16 +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.