Polymer conjugates of ara-c and ara-c derivatives
CA 2383240 A1 · Owner: Enzon, Inc. · Inventors: Choe, Yun Hwang; Greenwald, Richard B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to polymeric-prodrug transport forms of formula: (I) wherein: G is a linear or branched terminally functionalized , polymer residue; Y1 is O S, or NR1; M is X or Q; wherein X is an electron withdrawing group and Q is a moiety containing a free electron pair positioned three to six atoms from C(=Y1); B is (1) or (2); R1-5 are independently selected from the group consisting of hydrogen C1-6 alkyls, C3-12 branched , alkyls, C3-8 cycloalkyls C1-6 substituted alkyls, C3-8 substituted cycloalkyls, aryls, substituted aryls, aralkyls C1-6 heteroalkyls, substituted C1-6 heteroalkyls; R6 is OR7 or N3 NH2, NO2, or CN, where R7 is , selected from the same group …
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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 21, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2022.
- 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.