Disodium salts, monohydrate, and ethanol solvates
CA 2369591 C · Owner: Agarwal, Rajesh K. · Inventors: Ault, Joseph Murray; Agarwal, Rajesh K.; Goldberg, Michael M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The inventors have discovered that the disodium salt of certain delivery agents has surprisingly greater efficacy for delivering active agents than the corresponding monosodium salt. Furthermore the inventors have discovered that , the disodium salts of these delivery agents form solvates with ethanol and hydrates with water. The delivery agents have formula (I) wherein R1 R2, R3, and R4 are indepedently hydrogen halogen, C1-C4 alkyl, or C1-C4 alkoxy; and R5 is a substituted or unsubstituted C2-C16 alkylene substituted or , unsubstituted C2-C16 alkenylene substituted or unsubstituted C1-C12 , alkyl(arylene) or substituted or unsubstituted aryl(C1-C12 alkylene). The hydrates and …
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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 April 5, 2000 and granted June 14, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2022.
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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.