US PATENT SUBCLASS 356 / 311
.~ With sample excitation (e.g., burning)

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

300  DF  BY DISPERSED LIGHT SPECTROSCOPY {10}
311.~ With sample excitation (e.g., burning) {5}
312  DF  .~.~> By electrical resistance heating (e.g., graphite tube)
313  DF  .~.~> By arc or spark {1}
315  DF  .~.~> By flame
316  DF  .~.~> By high frequency field (e.g., plasma discharge)
317  DF  .~.~> By light {1}

DEFINITION

Classification: 356/311

With sample excitation (e.g., burning):

(under subclass 300) Subject matter including structure for heating, burning, or otherwise stimulating the sample to cause the emission of radiation for analysis.

(1) Note. For classification here as opposed to subclasses 244+ some portion of the apparatus for heating, burning, or

stimulating the samples or for analyzing the rays emitted by the specimen should be claimed.

(2) Note. The combination of the heating or combustion of a sample and the spectros:graphic analysis of the heated sample is in this Class 356 rather than in Class 23.

SEE OR SEARCH THIS CLASS, SUBCLASS:

244+, for sample holders for materials to be excited for spectros:graphic analysis, which do not include a heating means such as a flame, an arc, or spark device for the heating of the sample. See also (1) Note above.

302, for sample electrical or flame excitation when combined with a spectros:graphic recorder.

306, for sample electrical or flame excitation which additionally excites a substance whose wavelength and emission intensity at this wavelength are known. 307, for electrical or flame sample excitation which utilized the total emissive radiation produced as a standard of comparison against the intensity of light emitted by the sample at certain wavelengths.

308, for electrical or flame excitation of samples whose emitted radiation is detected by a repetitive, electro-optical scanning system.

417, for filter photometers which analyze certain wavelengths of light emitted as a result of electrical or flame excitation of a sample.