Drugs for ameliorating ocular circulatory disorders
CA 2270119 A1 · Owner: Kyoto Pharmaceutical Industries, Ltd. · Inventors: Watanabe, Noriko; Ogawa, Takahiro; Waki, Mitsunori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Drugs for ameliorating ocular circulatory disorders characterized by containing as the active ingredient 1,4-dihydropyridine derivatives represented by general formula (I) or acid-addition salts thereof wherein , each symbol is as defined in the specification. When dropped into the eyes in , particular, the above drugs enhance the blood flow in optic papillae and inhibit retinal vasoconstriction, a decrease in the blood flow in optic papillae and attenuation of VEP amplitude in the eyes with circulatory disorders caused by ET-1 without elevating the ocular tension. These facts suggest that the above drugs are useful as remedies for glaucoma in , particular with normal ocular tension …
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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 October 23, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 2019.
- 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.