Readily absorbable drug formulation of nb-818
CA 2004177 C · Owner: Yamada, Masaki · Inventors: Takeuchi, Kimito; Yamada, Masaki; Ishimaru, Sueaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A readily absorbable drug formulation obtained by incorporating to a water-soluble or enteric polymer both, a nonionic surfactant and (~)-2-carbamoyloxymethyl-4- (2,3-dichlorophenyl)-6-methyl-1,4-dihydropyridine-3,5dicarboxylic acid 3-isopropyl ester 5-methyl ester or (-)-2-carbamoyloxymethyl-4-(2,3-dichlorophenyl)-6-methyl- 1,4-dihydropyridine-3,5-dicarboxylic acid 3-isopropyl ester 5-methyl ester.
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 29, 1989 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 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.