Purification procedure of tpa from crude preparations
CA 1314833 C · Owner: Suzuki, Toshihiko · Inventors: Morii, Mitsuyoshi; Morii, Noriko; Ohoka, Masaharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Crude tPA containing as an impurity, a protein, which is reactive with an anti-human tPA antibody and has a molecular weight of 110,000 + 20,000 daltons is purified by bringing the crude tPA into close contact with an affinity reagent containing an immobilized Kunitz inhibitor which is produced in seeds of Erythrina latissima and other Erythrina plants and acts as an inhibitor on trypsin, plasmin and tPA but does not act on urokinase, so that tPA is collected selectively.
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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 March 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2010.
- 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.