Compositions of estrogen-cyclodextrin complexes
CA 2756207 C · Owner: Bayer Intellectual Property Gmbh · Inventors: Backensfeld, Thomas; Lipp, Ralph; Heil, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a daily dosage unit for inhibiting ovulation comprising: i) micronised drospirenone and a complex between ethinyl estradiol and a cyclodextrin wherein drospirenone is present in an amount of from 2 mg to 4 mg and wherein ethinyl estradiol is present in an amount of from 0.01 mg to 0.05 mg; and ii) at least one excipient.
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 December 20, 2001 and granted February 11, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2023.
- 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.