Inhibitors of retroviral proteases
CA 2032303 C · Owner: Budt, Karl-Heinz · Inventors: Budt, Karl-Heinz; Peyman, Anuschirwan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inhibitors of retroviral proteases, The present invention relates to compounds of the formula I (see formula I), in which A, Q, R2, R3 R4 and the corresponding radicals with an * are defined as indicated, in the description, a process for the preparation thereof and the use thereof , for inhibiting, retroviral proteases.
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 December 14, 1990 and granted March 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 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.
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.