US PATENT SUBCLASS 356 / 402
BY SHADE OR COLOR

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

402BY SHADE OR COLOR {10}
403  DF  .~> With merging colors or patterns (e.g., Maxwell disc)
404  DF  .~> Photography
405  DF  .~> Tristimulus examination
406  DF  .~> Trichromatic examination
407  DF  .~> With sample responsive to plural colors applied simultaneously
408  DF  .~> With sequential comparison of sample and standard
409  DF  .~> Fluid color transmission examination {4}
416  DF  .~> With color transmitting filter {4}
421  DF  .~> With reflective multicolor chart or standard {2}
425  DF  .~> With color determination by light intensity comparison

DEFINITION

Classification: 356/402

BY SHADE OR COLOR:

(under the class definition) Subject matter wherein light (emanating directly from a light source, or transmitted through or reflected from a substance) is analyzed for its frequency content by dividing the light into its component frequencies or bands of frequencies (which are usually of as predetermined character), or by comparison in frequency or intensity with standard lights (emanating directly from a light source, or transmitted through or reflected from a substance).

(1) Note. The first mentioned light is the light sample or from the sample to be tested while the second mentioned light is the standard or from the standard.

(2) Note. Search subclass 51 if either infrared or ultraviolet light is utilized in the test.

(3) Note. When complementary colors are utilized to produce a gray-type visual response they will be classified in the appropriate portion of this color section.

(4) Note. Where lamps including photo responsive detectors, per se, such as phototubes are tested for color response as an indication of their operating characteristics, see Class 324, especially subclasses 24+ for space discharge-type tubes and subclass 158.1 for solid-state-type devices. However, this Class 356 provides for color determination of light from a lamp where the lamp operating characteristics are not involved.

SEE OR SEARCH THIS CLASS, SUBCLASS:

43+, for optical pyrometers which correlate the color of a light source or a heated light emissive substance with the temperature of the light source or the heated light emissive substance. 300+, for spectroscopes, spectrometers, and spectrophotometers which analyze light or substance for color and light intensity which involve the use of a dispersing element, such as a prism or diffracting medium, rather than a filter or filters to isolate the different colors present in the light or substances being tested.

SEE OR SEARCH CLASS

73, Measuring and Testing,

23.35, and 53+ for the testing of effluents of a mixture of gases or liquids such as chromatography tests which have contacted a solvent or sorbent component successively and selectively to determine the quantity, quality, or identity of a component of the effluent.

95, Gas Separation: Processes,

82+, for processes of gas separation using chromatography.

96, Gas Separation: Apparatus,

101+, for chromatography type apparatus for gas separation.

209, Classifying, Separating, and Assorting Solids,

580, 582 for assorting articles based upon color sensing of articles.

250, Radiant Energy, 226, for photo-electric preoptical systems dealing with color.

346, Recorders, see (3) Note of

74, for the line between Classes 356 and 346.

374, Thermal Measuring and Testing,

106, and 162 for temperature determination by color, other than by thermally emitted radiation.

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

50+, for analytical apparatus having color change indicating means.

436, Chemistry: Analytical and Immunological Testing,

1+, for chemical analytical tests involving color changes.