Sabic Global Technologies B.v.

Shpp Global Technologies B.v.

Ernest Caldwell

Charles Padgett

Lanse Padgett

Christopher Wall

Brian Jason Rice

Mark A Sanner

Gerould Harding

Walter R Thompson

Donald W DeMello

Marcos Fernando Borges

Andrew May

Haralur Gurulingamurthy

Shawn William Lee

Shawn Lee

Andrew W May

An ammunition article comprises a polymer cartridge case formed of a polymer composition comprising a thermoplastic polymer, preferably the polymer composition having a density of less than 1.35 determined in accordance with ASTM D792, the polymer cartridge case having a first end, an opposing second end, and a chamber disposed between the first end and the second end for receiving a propellant; a projectile attached to the first end of the polymer cartridge case; a metal base insert joined to the second end of the polymer cartridge case; and a primer carried by the metal base insert; wherein the metal base insert and the polymer cartridge case remain joined together as a single piece assembly upon loading, firing and removal from a chamber of a firearm for a polymer case temperature of &#x2212;65&#xb0; F. (&#x2212;54&#xb0; C.) to 165&#xb0; F. (74&#xb0; C.).

Lightweight ammunition articles comprising a polymer cartridge case

Improvements in compressor manufacture are achieved by utilizing polymeric components which retain at least 90% of their dimensions after being exposed to a mixture of refrigerants and/or lubricants for 30 days at 60&#xb0; C. Polymeric materials include (i) polyetherimides, (ii) polyphenylene sulfides, (iii) polyketones, (iv) polysulfones, (v) liquid crystal polymers, and (vi) combinations thereof. Metal coatings on the polymers are the preferred embodiments for housings.

Compressors including polymeric components

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Dunwoody, GA, United States of America

Ernest Caldwell