Drugs, vaccines and hormones in polylactide coated microspheres
CA 2180424 C · Owner: Modi, Pankaj · Inventors: Modi, Pankaj
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A controlled release formulation for use with a variety of drugs vaccines or hormones are formed in microspherical form. The drug, vaccine or hormone, e.g. bovine somatropine hepatitis vaccine, is suspended in a polymer matrix. The polymer matrix is formed from at least two water soluble biodegradable polymers selected for example from starch, crosslinked starch ficoll, polysucrose, polyvinyl alcohol gelatine, hydroxymethyl cellulose, hydroxyethyl cellulose hydroxypropyl cellulose, hydroxypropyl-ethyl cellulose hydroxypropyl-methyl cellulose, sodium carboxymethyl cellulose cellulose acetate, sodium alginate, polymaleic anhydride esters polyortho, esters, polyethyleneimine, polyethylene …
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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 February 14, 1995 and granted May 4, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 14, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 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.