Enkephalinase inhibitors
CA 1298307 C · Owner: Squibb (E.R.) & Sons, Inc. · Inventors: Gordon, Eric M.; Delaney, Norma G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inhibition of enkephalinase activity in mammals is achieved by the present novel compounds having the formula, and pharmaceutically acceptable salts thereof wherein, R1 is hydrogen or R5-?-, wherein R5 is alkyl, aryl, arylalkyl, heteroaryl, or (heteroaryl)alkyl;, R2 and R3 are each independently hydrogen alkyl, (cycloalkyl)alkyl, aryl, arylalkyl heteroaryl, or (heteroaryl)alkyl;, R4 is hydroxy alkoxy, arylalkoxy, (hetero-, aryl)alkoxy (substituted alkyl)oxy, or -NR6R7, wherein R6 and R7 are each independently hydrogen alkyl, substituted alkyl, aryl, arylalkyl or, (heteroaryl)alkyl; and, n is an integer of 1 to 15.
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 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
- 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.