Urea derivatives
CA 1191862 A · Owner: The Procter & Gamble Company · Inventors: Buckwalter, Brian L.; Lahann, Thomas R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound, or pharmaceutically acceptable salt thereof having the formula:, wherein X is O or S; wherein n = 1 or O; wherein R is C3-C12 alkyl or aralkyl, branched or unbranched aryl or haloaryl, or, C3-C22 alkenyl, branched or unbranched; wherein Rl is OCH3 and wherein R2 is OH. These urea derivatives have analgesic and anti-irritant activity when administered to humans and lower animals.
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 August 13, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.