Expired Canadian patentCanada
N-acyl derivatives of the ll-e33288 antitumor antibiotics
CA 2014472 C · Owner: Lee, May Dean-Ming · Inventors: Lee, May Dean-Ming
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 is N-acyl and dihydro-N-acyl analogs of the family of antibacterial and antitumor agents known collectively as the E33288 complex.
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 12, 1990 and granted March 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2012.
- 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 12, 1990
GrantedMarch 28, 2000
Term endedApril 12, 2010
Patent numberCA 2014472 C
Classification (IPC)C07H15/20 +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.