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:
Apr. 06, 1993
Filed:
Aug. 13, 1991
Bruce S Dunn, Los Angeles, CA (US);
Joan S Valentine, Encino, CA (US);
Jeffrey I Zink, Sherman Oaks, CA (US);
Lisa Ellerby, Los Angeles, CA (US);
Fumito Nishida, Los Angeles, CA (US);
Clinton Nishida, Los Angeles, CA (US);
Stacey A Yamanaka, Los Angeles, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
An active biological material encapsulated in a glass is formed using a sol-gel process. A metal alkoxide is mixed with water and exposed to ultrasonic energy at a pH.ltoreq.2 to form a single phase solution which is then buffered to a pH between about 5 and 7. The buffered solution is then mixed with the active biological material and the resultant gel is aged and dried. The dried product is a transparent porous glass with substantially all of the added active biological material encapsulated therein, the biological material retaining a high level of activity.