Intraocular pressure lowering heterocyclic compounds
CA 2096012 A1 · Owner: Chen, June · Inventors: Chen, June; Ruiz, Guadalupe; Wolde Mussie, Elizabeth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method of treating ocular hypertension by applying to the eye an amount sufficient to treat ocular hypertension of a compound of formula (I) wherein R is, hydrogen or an acyclic hydrocarbon group of 1 to about 6 carbon atoms and Het is a five membered heterocyclic ring containing two or three hetero-atoms selected from N, O and S unsubstituted or, substituted with an acyclic hydrocarbon group of up to about 10 carbon atoms, an alicyclic hydrocarbon group of about 3 to about 6 carbon atoms, or with an -OR1 group in which R1 is an acyclic hydrocarbon group of 1 to about 6 carbon atoms or a, pharmaceutically acceptable acid addition salt thereof.
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 13, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2013.
- 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.