Topical compositions for prostaglandin e1 delivery
CA 2373821 C · Owner: Nexmed Holdings, Inc. · Inventors: Yeager, James L.; Buyuktimkin, Nadir; Buyuktimkin, Servet
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition of a semi-solid consistency is provided for use in the manufacture of a topical medicament for the transdermal application of prostaglandin E1. The composition comprises prostaglandin E1 a penetration , enhancer, a polysaccharide gum a lipophilic compound, and an acidic buffer system. The penetration enhancer is an alkyl-2-(N,N-disubstituted amino)alkanoate ester, an (N,N-disubstituted amino)-alkanol alkanoate or a mixture , of these. The lipophilic compound may be an aliphatic C1 to C8 alcohol an , aliphatic C8 to C30 ester, or a mixture of these. The composition includes a buffer system capable of providing a buffered pH value for said composition in the range of about …
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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 May 13, 1999 and granted October 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 2021.
- 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.