US PATENT SUBCLASS 356 / 315
.~.~ By flame


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

300  DF  BY DISPERSED LIGHT SPECTROSCOPY {10}
311  DF  .~ With sample excitation (e.g., burning) {5}
315.~.~ By flame


DEFINITION

Classification: 356/315

By flame:

(under subclass 311) Subject matter including a flame producer whose flame heats or burns the sample to cause the emission of radiation to be analyzed.

(1) Note. See the Search Class notes below for the line

between this class (356) and the class for all methods of burning of fuel not classified elsewhere.

(2) Note. A light source and means to modify the light for general illumination purposes are classified elsewhere.

SEE OR SEARCH THIS CLASS, SUBCLASS:

417, for excitation photometers where filters rather than light dispersing structure are used to select the wavelength of the emitted light to be examined that is present in the excited sample.

SEE OR SEARCH CLASS

137, Fluid Handling, 205, and 604 for devices which utilize a separating apparatus to move a liquid or gaseous sample from a supply to another location.

239, Fluid Sprinkling, Spraying, and Diffusing, see

144, and 422; see subclasses 398+ for the combining of separately supplied fluids which are emitted from a nozzle.

250, Radiant Energy,

554, for flame source combined with a photocell where a physical characteristic of the flame is detected.

362, Illumination, for general illumination devices which include a light source and means to direct the light. A light source and a chimney, for example, without means to limit the light source specifically for examination purposes, such as a monochromator or means to hold additionally the material to be examined, would be classifiable in Class 362.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

50+, for apparatus having means to burn the material being analyzed.

431, Combustion,

4, and 126 for the methods and apparatus pertaining to the burning of a combustible fluid. See Notes 1, 2, and 3 below

(1) Note. Class 431, Combustion, will take all methods of burning of fuel not classified elsewhere. Class 431 will take the combination which includes a burner having a nozzle or a pipe outlet means to feed a fuel, a combustion supporting fluid to the pipe or nozzle outlet to produce a flame, and means to feed a sample fluid into the flame produced by the burner so that the heat of the burner will increase the energy of the sample to the point whereby the

sample will emit radiation. (2) Note. The combination of a spectral flame burner such as recited in Note 1 above with an optical element necessary to inspect the flame such as a "chimney" or "means to view the flame" where it is more than inspection of the flame and involves the examination of the color intensity or wavelength of the light of the flame, is classified in Class 356 rather than Class 431.

(3) Note. Class 431, will not take the feeding of powdered material entrained in a fluid.

436, Chemistry: Analytical and Immunological Testing,

1+, for processes involving the burning of material which involves a chemical reaction, or the analysis or treatment of the products of combustion where not elsewhere classified. See also (2) Note of subclass 311.