Lymphocyte-activating factor, method for the preparation thereof and method for the proliferation of antibody-forming lymphocytes and production of antibody using the same
CA 2019408 A1 · Owner: Takahashi, Naommy · Inventors: Takahashi, Naommy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel lymphocyte-activating factor having an activity for stimulating proliferation and antibody-production of lymphocytes can be derived from small-intestine mucosal epithelia of a mammalian animal such as cattle by mashing the mucosal epithelia, removing the solid matter from the mush, dialyzing the extract, and precipitating the effective fraction in the undialyzed extract by salting-out. The lymphocyte-activating factor can be used for the production of an antibody against pathogenic viruses by culturing lymphocytes inoculated with the virus in a medium containing the factor.
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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
- Filed June 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 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.