0-(3-amino-2-hydroxypropyl)-hydroximic acid halides and process for preparing the same
CA 2000830 C · Owner: Almasi, Attila · Inventors: Nemeth, Gabor; Zsila, Gizella; Gachalyi, Bela
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel hydroximic acid derivatives are disclosed having the general formula:, (see fig. I) (I), wherein X is halo, R1 is hydrogen or lower alkyl R~ is, lower alkyl, cycloalkyl, phenyl or hydroxyphenyl or R1, and R~ together with the adjacent nitrogen atom form a 5 to 8 member ring, R3 is hydrogen, phenyl naphthyl or, pyridyl, R4 and R5 are each hydrogen or phenyl and m and, n are each 0, 1 or 2. Processes for preparing the derivatives (I) are also disclosed, as well as pharmaceutical compositions containing the novel compounds, which are useful in diabetic angiopathy therapy.
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 October 17, 1989 and granted September 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2011.
- 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.