Non-a, non-b hepatitis-associated antigen and diagnostic reagent
CA 1184846 A · Owner: Eisai Co. Ltd. · Inventors: Morimoto, Tomiaki; Tomatsu, Junichi; Shikata, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A type non-A, non-B hepatitis-associated antigen is obtained by isolation and purification from non-A, non-B hepatitis autopsy liver and has the followingphysicochemical properties: molecular weight: 1,500,000 or more, (gel filtration) sedimentation constant (10-13): 51,5S, (ultracentrifugal analysis) buoyant density (g/cm3): 1.15 - 1.25 (in cesium chloride and in potassium bromide), particle diameter (nm): 26 - 37 electrophoretic mobility: .alpha.2 - .alpha.1 globulin region (in agarose gel). A type non-A, non-B hepatitis diagnostic reagent contains as its principal, ingredient, a conjugate of the above-described antigen.
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
- Granted April 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 2002.
- 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.