US PATENT SUBCLASS 252 / 582
LIGHT TRANSMISSION MODIFYING COMPOSITIONS

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

582LIGHT TRANSMISSION MODIFYING COMPOSITIONS {6}
583  DF  .~> Modification caused by energy other than light
584  DF  .~> Inorganic crystalline solid
585  DF  .~> Producing polarized light
586  DF  .~> Displaying color change
587  DF  .~> Infrared
588  DF  .~> Ultraviolet {1}

DEFINITION

Classification: 252/582

LIGHT TRANSMISSION MODIFYING COMPOSITIONS:

(under the class definition) Compositions used usually in various optical applications which change light and visible solar radiations (including infrared and ultraviolet) transmittance properties when exposed to energy, usually visible radiation.

(1) Note. This subclass includes compositions specialized for use as optical filters or as coatings which have optical filtering or as coatings which have optical filtering properties, as well as optical filters defined solely in terms of their composition with no claimed significant filter structure.

(2) Note. Where the filter is claimed in terms of the composition of which it is composed and also in terms of significant filter structure, it is classified in the

appropriate class providing for such structure and cross-referenced to this subclass (582). See the search notes below.

(3) Note. Where the claimed filter is defined in terms of only a single material and no significant filter structure is recited, it is classified in the appropriate class providing for such material.

SEE OR SEARCH CLASS

106, Compositions: Coating or Plastic,

47+, for glass compositions which have optical filtering properties. 204, Chemistry: Electrical and Wave Energy, especially

157.15+, for processes making photochromic material (other than coating) involving chemical reaction brought about by wave energy.

359, Optics: Systems (Including Communication) and Elements,

350+, 885+, and the classes specified in the notes thereto, for devices which include as part thereof an optical filter and for optical filters, per se, which are claimed in terms of significant filter structure.

424, Drug, Bio-Affecting and Body Treating Compositions,

59, for cosmetic compositions performing a filtering function, e.g., suntan lotions.