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:
Dec. 24, 1991
Filed:
May. 18, 1990
Applicant:
Inventors:
Larry L Hench, Gainesville, FL (US);
Arthur E Clark, Gainesville, FL (US);
Rounan Li, Gainesville, FL (US);
Assignee:
Geltech, Inc., Alachua, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C01B / ; C03C / ; C04B / ;
U.S. Cl.
CPC ...
106 35 ; 423308 ; 423311 ; 501-2 ; 501-5 ; 501 10 ; 501 63 ; 501 72 ; 501 80 ; 623 11 ; 623 16 ;
Abstract
Sol-gel processing techniques are used to produce alkali-free bioactive glass compositions based on SiO.sub.2, CaO and P.sub.2 O.sub.5. By varying the SiO.sub.2 content, a range of hydroxyapatite production rates can be obtained; conversely, varying the time of exposure to actual or simulated in vivo solutions permits use of a range of allowable proportions of SiO.sub.2. The sol-gel derived compositions can be chosen to achieve target values for thermal expansion coefficient, elastic modulus and volume electrical resistivity.