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:
Mar. 24, 1987
Filed:
Apr. 30, 1986
Toshihiro Kasuga, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
Glass ceramic comprising apatite crystals and at least 50% by weight of wollastonite crystals and a process for producing the same are disclosed. The glass ceramic contains from 45 to 56% by weight of CaO, from 1 to less than 10% by weight of P.sub.2 O.sub.5, from 30 to 50% by weight of SiO.sub.2, from 0 to 5% by weight in total of one or two of MgO and Y.sub.2 O.sub.3, and from 0 to 5% by weight of one or more of F.sub.2, Na.sub.2 O, K.sub.2 O, Li.sub.2 O, Al.sub.2 O.sub.3, TiO.sub.2, ZrO.sub.2, SrO, Nb.sub.2 O.sub.5 and Ta.sub.2 O.sub.5, with the total content of CaO, P.sub.2 O.sub.5 and SiO.sub.2 being at least 90% by weight. The glass ceramic exhibits excellent biocompatibility and has improved strength.