Expired Canadian patentCanada
Glycopeptide antibiotics
CA 2444673 C · Owner: Kong, Fangming · Inventors: He, Haiyin; Cai, Ping; Kong, Fangming
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides compounds of formula (I) wherein R1, R2, R3, R4, R5, R6a, R6b, R6c R6d, R6e and R7 are defined in the specification. These compounds are useful as antibiotic agents.
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 April 25, 2002 and granted October 7, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 25, 2002
GrantedOctober 7, 2014
Term endedApril 25, 2022
Patent numberCA 2444673 C
Classification (IPC)A61K38/12 +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.