High dosage topical forms of collagenase
CA 2083333 C · Owner: Advance Biofactures Of Curacao, N.V. · Inventors: Yee, David; Stern, Harold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides pharmaceutical compositions for topical application containing high concentrations of the enzyme collagenase in non-aqueous excipients. The invention also provides a particular excipient, dextran which is especially, useful for admixture with collagenase and which can also be used to advantage with uother pharmaceutically active materials.
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 November 19, 1992 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 2014.
- 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.