US PATENT SUBCLASS 252 / 182.3
.~.~ Reactant contains phosphorus, silicon, or sulfur atom, or contains metal-to-carbon bond

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

182.11  DF  COMPOSITIONS CONTAINING A SINGLE CHEMICAL REACTANT OR PLURAL NONINTERACTIVE CHEMICAL REACTANTS; I.E., NOT VIS-A-VIS {2}
182.12  DF  .~ Organic reactant {4}
182.3.~.~ Reactant contains phosphorus, silicon, or sulfur atom, or contains metal-to-carbon bond

DEFINITION

Classification: 252/182.3

Reactant contains phosphorous, silicon, or sulfur atom, or contains metal-to-carbon bond:

(under subclass 182.11) Subject matter wherein the organic reactant contains a phosphorous, silicon or sulfur atom or contains a metal-to carbon bond, e.g., mixture of phosphite compounds to scavenge aldehydes and ketones, etc.

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2+, for gas generating compositions for extinguishing fires.

60+, for generating compositions specialized for use in frothfloatation separation processes.

181.1, for getter and gas or vapor generating composition for electric lamps, electric space discharge devices and other evacuated or gas or vapor filled containers.

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149, Explosive and Thermic Compositions or Changes, appropriate subclasses for gas generating composition which under go a chemical change at a very rapid rate, or a rate approaching instantaneous reaction, resulting in the

production of usable force as in blasting, fire arms, jet propulsion, filling automotive passenger restraining gas-bags, etc. 516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, appropriate subclasses for subject matter relating to: colloid systems (such as sols*, emulsions, dispersions, foams, aerosols, smokes, gels, or pastes) or wetting agents (such as leveling, penetrating, or spreading); subcombination compositions of colloid systems containing at least an agent specialized and designed for or peculiar to use in making or stabilizing colloid systems; compositions and subcombination compositions specialized and designed for or peculiar to use in breaking (resolving) or inhibiting colloid systems; processes of making the compositions or systems of the class; processes of breaking (resolving) or inhibiting colloid systems; in each instance, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art; including those instances when a composition would otherwise be proper for this subclass (182.11) and its indented subclasses.

521, Synthetic Resins or Natural Rubbers,

50+, for compositions containing all the required reactant or polymer derived thereof plus foam generating composition (blowing agent).