5,11-dihydro-6h-dipyrido3,2-b:2'3'-e1,4diazepin-6-ones and their use in the prevention or treatment of aids
CA 2014771 C · Owner: Schmidt, Gunther · Inventors: Engel, Wolfhard; Hargrave, Karl D.; Schmidt, Gunther
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are novel 5,11-dihydro-6H-dipyrido3,2-b; 2', 3'-a1,4 diazepin-6-ones of the formula I (see formula I), wherein, R1 and R2 are the same or different and are hydrogen or straight or branched alkyl of 1 to 5 carbon atoms. These are useful for the prevention or treatment of AIDS.
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 April 18, 1990 and granted August 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 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.