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US Patent 4328750 - Plastic coated ammunition and methods of manufacture

US Patent Issued on May 11, 1982
Estimated Patent Expiration Date: Icon_subject May 11, 1999Estimated 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.
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Abstract

Disclosed is a lead bullet having a coating comprised of a thermoplastic composition of molybdenum disulfide and Nylon 11. Nylon 11 per se and other coatings are also disclosed. The coating minimizes or prevents deposition of lead along the barrel and other mechanisms of a firearm. To apply the coating, the bullet is initially degreased and heated to clean its surfaces. A phosphate coating is applied and the bullet is heated to a temperature of at least 425° F. The heated bullet is then disposed in blended molybdenum disulfide and Nylon 11 powder, Nylon 11 per se, or other coating materials to obtain a coating thickness within a range of 1-12 mils. The coated bullet is subsequently heated to at least 367° F. to fuse and to densify the coating on the bullet.

Other References

  • Bronson, Wall Street Journal, Oct. 19, 1978, p. 35

Inventors

Assignee

Application

No. 05/955072 filed on 10/26/1978

US Classes:

102/514, Having jacket102/376, With cartridge means427/195, Synthetic resin particles427/376.6, Metal-containing coating427/419.7, Boride, carbide, nitride, phosphide, silicide, or sulfide-containing coating427/419.8, Organometallic or metal salt of organic compound-containing coating428/458, Next to polyester, polyamide or polyimide (e.g., alkyd, glue, or nylon, etc.)428/469, Next to metal salt or oxide428/645Pb-base component

Examiners

Primary: Hunt, Brooks H.
Assistant: Gluck, Irwin

Attorney, Agent or Firm

US Patent References

2703768, 2928348, 3356029, 3397636, 3403626, 3429261, 3580178, 3910194

International Classes

F42B 12/00 (20060101)
F42B 12/80 (20060101)
F42B 14/00 (20060101)
C08K 3/00 (20060101)
C08K 3/30 (20060101)
F42B 14/02 (20060101)

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