Pharmaceutically acceptable dnase formulation
CA 2184582 C · Owner: Hsu, Chung C. · Inventors: Mumenthaler, Marco; Gonda, Igor; Hsu, Chung C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention describes methods and means for preparing pharmaceutically acceptable formulations of DNase via spray-drying solutions comprising said DNase and a compatible excipient under conditions such that a dry powder containing DNase is produced. Such products of spray drying result in the exhibition of properties known to be essential for therapeutic effectiveness when the formulations are administered by dispersion into the lung of an individual patient. The therapeutic effect results in the DNase effecting enzymatic alteration of the viscoelasticity of mucus within the lung of the individual so treated.
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 February 28, 1995 and granted December 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2017.
- 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.