Method and preparations for stabilizing biological materials by drying methods without freezing
CA 2235243 C · Owner: Winter, Gerhard · Inventors: Mattern, Markus; Winter, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method of producing dry partially amorphous products containing biological, in particular therapeutically active material, the , products comprising macroscopically homogeneous substance mixtures. The substance mixtures are selected from at least one substance of the group comprising: (i) carbohydrate or zwitterion with a polar residue and its derivatives; and (ii) zwitterion with an apolar residue and its derivatives. The method is characterized in that a solution of the biologically or therapeutically active material and substances (i) and (ii) is produced and dried at a product temperature above the freezing point of the solution. The invention further …
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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 October 24, 1996 and granted April 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 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
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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.