Immunotherapy involving cd28 stimulation
CA 2003455 C · Owner: Ledbetter, Jeffrey A. · Inventors: Lindsten, Tullia; Ledbetter, Jeffrey A.; June, Carl H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of immunotherapy stimulates the T cell CD28 surface molecule to enhance T cell proliferation and increase overall lymphokine levels or to increase cellular production of human T H1 lymphokines or both. The method is selective for the induction of activated T cell mediated immune responses and enhances immune function even in the presence of immunosuppresants.
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 November 21, 1989 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2011.
- 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.