Composition for prophylaxis and treatment of myopia
CA 2133805 A1 · Owner: Watanabe, Noriko · Inventors: Watanabe, Noriko; Shigemitsu, Toshiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition for the prophylaxis and treatment of myopia comprising a compound of the formula, wherein R is alkyl R1 is hydrogen or amino and R2 is, carboxyl or tetrazolyl or a salt thereof. The composition for the prophylaxis and treatment of myopia of the present invention not only shows relaxing action on the ciliary smooth muscle of rabbit, but also shows superior effects of prevention and treatment of myopia of the patients on whom Mydrin-M a, conventional preparation for the prophylaxis and treatment of myopia, failed to have effects. In addition the comopsition, does not show a mydriatic response and can be advantageously used for the prophylaxis and treatment of myopia.
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 6, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 6, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2016.
- 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.