Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2005-03-15
2005-03-15
Therkorn, Ernest G. (Department: 1723)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S656000, C424S085400, C424S085500, C424S085600, C424S085700, C530S351000, C530S413000, C530S416000, C435S811000
Reexamination Certificate
active
06866782
ABSTRACT:
There is disclosed a process for the purification of pharmacologically active proteins based on the use of the cationic exchange chromatography on a solid matrix carried out at a more basic pH, i.e. higher, in respect of the pH corresponding to the isoelectric point, pI, of the proteins to be purified, pH at which however said proteins still remain absorbed. Buffer solutions with values of pH and of ionic strength adjusted from time to time to the kind of pharmacologically active protein to be purified are used in order to obtain such a result. The process is mainly addressed to the purification of the interferon and albumin proteins.
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Scapol Lucia
Viscomi Giuseppe Claudio
Alfa Wassermann S.p.A.
Bucknam and Archer
Therkorn Ernest G.
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