Protein anti-cancer agent
CA 2010256 C · Owner: Merck & Co. Inc. · Inventors: Jones, Deborah D.; Oliff, Allen I.; Edwards, Gwynneth M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
We have modified PE40 toxin by removing at least two of its four cysteine amino acid residues and have formed hybrid molecules containing modified PE40 linked to a cell recognition protein that can be an antibody, a growth factor, a hormone a, lymphokine, or another polypeptide.cell recognition protein for which a,specific cellular receptor exists. whereby the modified PE40 toxin is directed to cell types having receptors for the cell recognition protein linked to the modified PE40.
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 February 16, 1990 and granted July 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 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.