Methods for preparation of hb.sub.sag free gamma globulins and products
CA 1212625 A · Owner: Ortho Diagnostic Systems Inc. · Inventors: Kaplan, Paul M.; Padvelskis, John V.; Zolton, Raymond P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
METHODS FOR PREPARATION OF HBsAg FREE GAMMA GLOBULINS AND PRODUCTS, Abstract, Methods for producing from human serum human gamma globu-, lin essentially free of HBsAg and products resulting therefrom. Specifically provided are ion exchange resin/buffer systems capable of effectively removing HBsAg thought to be closely correlated with viral hepatitis type B infectivity. Additional steps can include ultrafiltration to increase reduction of any virus not removed in the column passage as well as the addition of anti-HBg to substantially eliminate all infectivity.
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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 October 14, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 2003.
- 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.