Method for producing cubic boron nitride abrasive grains

Details Method for producing cubic boron nitride abrasive grains Method for producing cubic boron nitride abrasive grains

2008-07-29

2008-07-29

Marcheschi, Michael A (Department: 1793)

Abrasive tool making process, material, or composition

With inorganic material

C051S293000, C501S096400, C423S290000, C209S164000

Reexamination Certificate

active

07404832

ABSTRACT:
The present invention relates to a method for producing cubic boron nitride abrasive grains used for producing a grinding wheel, etc., and to cubic boron nitride abrasive grains. The method comprises maintaining a mixture containing hexagonal boron nitride and seed crystals of cubic boron nitride under pressure and temperature conditions where cubic boron nitride remains thermodynamically stable, characterized in that the seed crystals contain cubic boron nitride twin crystals.

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Database WPI Week 199736 Derwent Publications Ltd., London, GB; AN 1997-389537.
Office Action from Japanese Patent Office dated Feb. 10, 2006, along with English translation of reasons for rejection.
Patent Abstracts of Japan, abstracting JP-A-09-169971 of Jun. 30, 1997.

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