Lead-free precussion primer mixes based on metastable interstitial composite (MIC) technology

Patent 5717159 Issued on February 10, 1998. Estimated Expiration Date:

February 19, 2017. 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

3703144

Thermal battery with metal-metal oxide heating composition
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Inventors

Application

No. 816747 filed on 02/19/1997

US Classes:

149/40, Plural oxygen yielding compounds102/204, Percussion primers or ignitors102/205, Heat, friction, or chemical primers or ignitors149/37, METAL OR ALLOY OR METALLOID, EACH IN PARTICULATE FORM, WITH AT LEAST ONE METAL OXIDE, INORGANIC OXYGEN CONTAINING SALT OR ORGANIC METAL-OXYGEN SALT149/108.2CONTAINING FREE METAL OR FREE CARBON

Examiners

Primary: Nelson, Peter A.

Attorney, Agent or Firm

Sliwka; Melvin J., Bokar; Gregory M., Church; Stephen J.

International Classes

C06B 033/12
F41F 001/40

Abstract

A lead-free percussion primer composition and a percussion cup containing e composition. The lead-free percussion primer composition is comprised of a mixture of about 45 wt % aluminum powder having an outer coating of aluminum oxide and molybdenum trioxide powder or a mixture of about 50 wt % aluminum powder having an outer coating of aluminum oxide and polytetrafluoroethylene powder. The aluminum powder, molybdenum trioxide powder and polytetrafluoroethylene powder has a particle size of 0.1 μm or less, more preferably a particle size of from about 200-500 angstroms.