Para-nitroanilide peptides
CA 2109646 C · Owner: Pfizer Inc. · Inventors: Daumy, Gaston O.; Reiter, Lawrence A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of the formula, R1-A2-A1-Asp-p-nitroanilide I wherein:, A1 is a residue of any of the naturally occurring .alpha.-amino acids or a homolog, analog or derivative of a natural .alpha.-amino acid; A2 is a residue of a lipophilic .alpha.-amino acid; R1 is alkylcarbonyl,phenalkylcarbonyl,alkoxycarbonyl,phenalkoxycarbonyl alkylaminocarbonyl, phenalkylaminocarbonyl or R2-A3 wherein A3 is a residue of a lipophilic .alpha.-amino acid; and R2 is alkylcarbonyl, alkoxycarbonyl or phenylalkoxycarbonyl and, a method of detecting inhibitors of interleukin 1.beta. converting enzyme (ICE), comprising evaluating a test compound's capacity to inhibit the ICE-induced hydrolysis, of a compound of …
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 November 22, 1993 and granted March 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2015.
- 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.