Dental glass powders comprising spherical glass particles of specific particle size distribution

US6623856B1 · kind B1 · utility

Assignee

• Superior MicroPowders LLC · US

Inventors

• Toivo T. Kodas · Albuquerque, US
• Mark J. Hampden-Smith · Albuquerque, US
• Quint H. Powell · Albuquerque, US
• James Brewster · Rio Rancho, US
• Daniel J. Skamser · Albuquerque, US
• Klaus Kunze · Albuquerque, US
• Paolina Atanassova · Waltham, US
• Paul Napolitano · Albuquerque, US

Key dates

• Filing date: Mar 8, 2000
• Grant date: Sep 23, 2003
• Expiry date: Mar 8, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2996
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Dental glass powders, methods for producing the powders and dental compositions including the glass powders. The powders preferably have a well-controlled particle size, narrow size distribution and a spherical morphology. The method includes forming the particles by a spray pyrolysis technique. The invention also includes dental filler and restorative compositions that include the glass powders.