Method for immortalizing cells
CA 2263790 C · Owner: Foster, Douglas N. · Inventors: Foster, Linda K.; Foster, Douglas N.; Farris, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to the introduction of p53 under the control of the metallothionein promoter into primary cells to produce immortalized cell lines. The cells are useful as substrates for viral propagation as , contaminant-free sources for recombinant protein production for recombinant , virus production and as cell substrates to support primary cells and improve virus yield during virus propagation.
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 August 13, 1997 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 2019.
- 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.