Enhancement of activity and/or duration of action of soft anti-inflammatory steroids for topical or other local application
CA 2558944 C · Owner: Bodor Laboratories, Inc. · Inventors: Bodor, Nicholas S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods and compositions for enhancing the activity and/or duration of action of loteprednol etabonate and other soft anti-inflammatory steroids of the haloalkyl 17.alpha.-alkoxycarbonyloxy-11.beta.-hydroxyandrost-4-en-3-one- 17.beta.-carboxylate type and the corresponding .DELTA.1,4-compounds are described. The enhancing agents have the formula: (II) wherein R is H or C1-C4 alkyl; Z1 is carbonyl or .beta.-hydroxymethylene; X1 is -O- or -S-; R5 is -OH -OR6, -OCOOR6 or -OCOR7 wherein R6 is C1-C4 alkyl and R7 is C1-C4 alkyl fluoromethyl or chloromethyl; and the dotted line in ring A indicates that the 1,2-linkage is saturated or unsaturated; with the proviso that when R is C1-C4 alkyl, …
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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 June 17, 2004 and granted May 29, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 17, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2026.
- 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
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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.