Modified cyclodextrin ring compounds having exactly two hydroxyl moieties substituted with an amino acid for therapeutics delivery
CA 2818071 C · Owner: Cerulean Pharma Inc. · Inventors: Davis, Mark E.; Khin, Kay T.; Cheng, Jianjun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to modified cyclodextrin ring compounds wherein , exactly two hydroxyl moieties are substitued with an amino acid selected from cysteine, tryptophan, glutamic acid, aspartic acid lysine. and arginine. These , compounds can act as carriers for small molecule therapeutics delivery and pharmaceutical compositions thereof.
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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 September 4, 2003 and granted August 18, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 4, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 2025.
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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.