The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 1986
Filed:
Nov. 15, 1983
Takao Ohmura, Osaka, JP;
Terufumi Fujiwara, Hyogo, JP;
Akimasa Ohmizu, Hyogo, JP;
Satoshi Funakoshi, Los Angeles, CA (US);
Green Cross Corporation, Osaka, JP;
Abstract
A process for producing a hepatitis B infection preventing vaccine containing hepatitis B surface antigen as a main component thereof which comprises removing human plasma components possibly causing adverse effects and components capable of causing hepatitis B infection by incorporating steps of fractionation using ammonium sulfate, adsorption on a colloidal silicate and fractionation using polyethylene glycol into the purification stage after heat treatment and further carrying out a treatment for infectivity inactivation without causing any antigenicity impairment.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile