Immunotoxins based on inactivated diphtheria toxins for cancer chemotherapy
CA 1341018 C · Owner: Youle, Richard J. · Inventors: Youle, Richard J.; Johnson, Virginia G.; Laird, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A potent and specific immunotoxin is prepared by coupling an inactivated diphtheria toxin to a binding moiety such as a monoclonal antibody or transferrin. The immunotoxins are specific for human tumors and leukemias and are indistinguishable in cell toxicity from that of the native toxin linked to the binding domain without the toxicity to other cells. The immunotoxin is useful in treating graft versus host disease as well as selectively killing tumor cells such, as medulloblastoma and glioblastoma cells.
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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
- Granted June 6, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 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.