Comminution with small particle milling media

Patent 5500331 Issued on March 19, 1996. Estimated Expiration Date:

May 25, 2014. 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.

Abstract Claims Description Full Text

Patent References

3104608

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Inventors

Application

No. 248774 filed on 05/25/1994

US Classes:

430/449, NONRADIATION SENSITIVE IMAGE PROCESSING COMPOSITIONS OR PROCESS OF MAKING241/184, Grinding bodies430/377, And binder, coating aid, solvent, emulsifier, hardener, chemical sensitizer, or optical sensitizer430/546, And solvent or emulsifier or coating aid430/631Film or film coating improvement ingredient containing, e.g., wetting agent, coating aid, plasticizer, antistatic agent, etc.

Examiners

Primary: Bowers, Charles L. Jr.
Assistant: Huff, Mark F.

Attorney, Agent or Firm

Anderson; Andrew J.

Foreign Patent References

498482 EP. 08/13/1992

International Classes

G03C 001/00
B02C 017/20

Abstract

A method of preparing submicron particles of a material, such as a pigment useful in paints or a compound useful in imaging elements, which comprises milling the agent in the presence of milling media having a mean particle size of less than about 100 microns. In a preferred embodiment, the milling media is a polymeric resin. The method provides extremely fine particles, e.g., less than 100 nm in size, free of unacceptable contamination.