US PATENT SUBCLASS 252 / 4
.~ Gas generative, chemically

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

2  DF  FIRE-EXTINGUISHING {4}
4.~ Gas generative, chemically {3}
5  DF  .~.~> Dry, combustion type
6  DF  .~.~> Low temperature chemically interreactive {1}
7  DF  .~.~> Carbonates or ammonium salts containing or pyrolytic

DEFINITION

Classification: 252/4

(under subclass 2) Compositions which contain components for generating gas by chemical reactions, substances peculiar thereto or processes which include such reactions.