U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Canasite-apatite glass-ceramics

Patent 5336642 Issued on August 9, 1994. Estimated Expiration Date: Icon_subject September 1, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Biocompatible glass ceramic material
Patent #: 3981736
Issued on: 09/21/1976
Inventor: Broemer ,   et al.

Alkali metal, calcium fluorosilicate glass-ceramic articles
Patent #: 4386162
Issued on: 05/31/1983
Inventor: Beall

Method of making alkali metal, calcium fluorosilicate glass-ceramic articles
Patent #: 4397670
Issued on: 08/09/1983
Inventor: Beall

Opal glasses having an apatite opacifying phase
Patent #: 4536481
Issued on: 08/20/1985
Inventor: Flannery ,   et al.

High-strength glass-ceramic containing anorthite crystals and process for producing the same
Patent #: 4643982
Issued on: 02/17/1987
Inventor: Kasuga ,   et al.

High-strength glass ceramic containing apatite crystals and a large quantity of wollastonite crystals and process for producing same
Patent #: 4652534
Issued on: 03/24/1987
Inventor: Kasuga

Fluoride-containing Bioglass™ compositions
Patent #: 4775646
Issued on: 10/04/1988
Inventor: Hench ,   et al.

Method for treating mineral material having organic carbon to facilitate recovery of gold and silver Patent #: 5536480
Issued on: 07/16/1996
Inventor: Simmons

Inventor

Assignee

Application

No. 114759 filed on 09/01/1993

US Classes:

501/3, Halogen containing crystalline phase (e.g., fluormica, etc.)501/10, Nonsilica and nonsilicate crystalline phase (e.g., spinel, barium titanate, etc.)501/57Fluorine

Examiners

Primary: Bell, Mark L.
Assistant: Jones, Deborah

Attorney, Agent or Firm

International Classes

C03C 010/16
C03C 003/112

Abstract

A glass-ceramic biomaterial having high strength and toughness, a family of glasses from which the glass-ceramic biomaterial can be produced, and a method of production. The material has a primary crystal phase of F-canasite and a secondary crystal phase of F-apatite. The glass family is SiO2 --CaO--Na2 O--K2 O--P2 O5 --F. The method may be a single stage heat treatment, or a two stage involving an initial nucleation and a subsequent crystallization.

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