Expired Canadian patentCanada
Antitumor and antibacterial substituted disulfide derivatives prepared from compounds possessing a methyltrithio group
CA 2014486 C · Owner: American Cyanamid Company · Inventors: Sassiver, Martin L.; Mcgahren, William J.; Ellestad, George A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This disclosure describes disulfide analogs of the family of antibacterial and antitumor agents known collectively as the LL-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 October 29, 2002. 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
GrantedOctober 29, 2002
Term endedApril 12, 2010
Patent numberCA 2014486 C
Classification (IPC)C07H15/20 +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.