Process for preparing virus-free natural substances
CA 2007236 C · Owner: Weller, Eberhard · Inventors: Weller, Eberhard; Disse, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is described a viral decontamination process for the preparation of essentially virus free natural substances which involves treating the natural substance with a mixture comprising a halogenated aliphatic hydrocarbon and an lower alcohol and, optionally water. The treatment kills off or inactivates coated and uncoated viruses, and may be used for example in the treatment of organ preparations.
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 January 5, 1990 and granted March 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 2012.
- 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.