US PATENT SUBCLASS 436 / 155
PYROLYSIS, COMBUSTION, OR ELEVATED TEMPERATURE CONVERSION

Current as of: June, 1999
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436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

155PYROLYSIS, COMBUSTION, OR ELEVATED TEMPERATURE CONVERSION {5}
156  DF  .~> Explosibility
157  DF  .~> Multiple stages of heating or heating at multiple temperatures or application of temperature gradient
158  DF  .~> Dividing or separating a sample stream
159  DF  .~> With catalyst or accelerator
160  DF  .~> Combustion with oxygen containing gas

DEFINITION

Classification: 436/155

PYROLYSIS, COMBUSTION, OR ELEVATED TEMPERATURE CONVERSION:

(under the class definition) Subject matter wherein the material to be analyzed is (1) heated either in the presence or absence of oxygen to cause a chemical reaction or (2) thermally decomposed.

(1) Note. Elevated temperature conversion is construed to be more than mere heating to increase or optimize reaction rate, e.g., the conversion will not occur unless performed at an elevated temperature.

(2) Note. On combustion in general: a process of combustion is not considered to be a chemical reaction, however, a quantitative reaction with oxygen or an oxygen containing gas in a test for a chemical specie is taken to be more than mere combustion and is considered to be a chemical test.

(3) Note. This subclass will provide for methods of sample preparation by combustion or pyrolysis.

SEE OR SEARCH CLASS

356, Optics: Measuring and Testing,

311+, for methods which include heating burning or otherwise stimulating a sample to cause emission of radiation of optical analysis including burning, resistance heating, arc heating, flame and high frequency fields.