3, 7 or 3 and 7 thia or oxa prostanoic acid derivatives as agents for lowering intraocular pressure
CA 2446386 C · Owner: Holoboski, Mark · Inventors: Burk, Robert M.; Holoboski, Mark; Posner, Mari F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a method of treating ocular hypertension or glaucoma which comprises administering to an animal having ocular hypertension or glaucoma therapeutically effective amount of a compound represented by the general formula (I), wherein hatched lines represent the .alpha. configuration, a triangle represents the .beta. configuration and a dotted line represents the presence or absence of a double bond; A and B are independently selected from the group consisting of O S and CH2 provided that , at least one of A or B is S; D represents a covalent bond or CH2 O, S or NH; , X is CO2R, CONR2, CH2OR, P(O)(OR)2 CONRSO2R SONR2 or Y is O, OH, OCOR2, halogen or cyano; Z …
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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 May 6, 2002 and granted February 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2024.
- 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
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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.