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, 1992
Filed:
Oct. 04, 1990
Tohru Nonami, Ichikawa, JP;
Nobuo Yasui, Narita, JP;
TDK Corporation, Tokyo, JP;
Abstract
A ceramic material for use as artificial bone and dental root is provided which takes the form of a composite sintered body comprising crystalline calcium phosphate grains as a matrix and inorganic whiskers dispersed therein. An intermediate layer containing elements in either one or both of the whiskers and the grains intervenes between the whiskers and the grains. The material has physical toughness and strength as well as biomedical affinity. The material is prepared by mixing calcium phosphate and a whisker-forming material or whiskers and sintering the mixture at a temperature of 800.degree. to 1600.degree. C., followed by slow cooling to allow formation of the intermediate layer.