Highly efficient production and isolation of viral particles
CA 2186034 C · Owner: Irish, Thomas W. · Inventors: Bay, Pierre M.; Gore, Richard S.; Tarr, George C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to a continuous process for producing viral particles comprising providing in a perfused growth medium a population of viable virally infected non-lytic cells and removing medium containing said cells at a rate to maintain the steady-state log-phase growth of cells remaining in said perfused growth medium. The invention is also directed to a process for purifying retroviral particles comprising passing a solution comprising the retroviral particles and contaminants through an anion exchange resin and eluting, the retroviral particles from the resin.
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 March 22, 1995 and granted November 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 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.