Hyaluronic acid esters and salts
CA 1341276 C · Owner: Fidia S.P.A. · Inventors: Romeo, Aurelio; Della Valle, Francesco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel esters of hyaluronic acid of the Formula Hy(COOR)n, wherein COO represents the carboxylic acid moiety on the hyaluronic acid (Hy) molecule radical, R is derived from an alcohol which is selected from the group consisting of an aliphatic alcohol having a chain of 2 to 34 carbons an, araliphatic alcohol a cycloaliphatic alcohol or a heterocyclic alcohol, and n is a large number, are provided herein. All or only a portion of the carboxylic groups of the acid are esterified. The salts of the partial esters with metals or with pharmacologically-acceptable organic bases are also provided herein. Pharmaceutical preparation are also provided which contain, as an active ingredient one or more …
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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
- Granted July 31, 2001. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 2018.
- 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.