Expired Canadian patentCanada
Benzoyl urea compounds, useful as anti-tumor drugs
CA 1266473 C · Owner: Kondo, Nobuo · Inventors: Sugi, Hideo; Yamada, Nobutoshi; Koyanagi, Toru
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 benzoyl urea compound having the formula: (I), wherein A is a bromine atom or a chlorine atom useful as antitumor drugs.
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 March 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 11, 1986
GrantedMarch 6, 1990
Term endedMarch 6, 2007
Patent numberCA 1266473 C
Classification (IPC)C07D239/34 +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.