US PATENT SUBCLASS 362 / 326
.~ Refractor

Current as of: June, 1999
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362 /   HD   ILLUMINATION

317  DF  LIGHT MODIFIER {5}
326.~ Refractor {7}
327  DF  .~.~> With reflector {2}
330  DF  .~.~> Panel type
331  DF  .~.~> Plural serial refractors
332  DF  .~.~> Separate sections
333  DF  .~.~> With plural elements on both sides of main surface {1}
335  DF  .~.~> Curved lens type {2}
339  DF  .~.~> Prismatic type {1}

DEFINITION

Classification: 362/326

(under subclass 317) Subject matter comprising a light pervious material having a pair of opposed refracting surfaces at least one of which is, at least in part, so angularly related to the other surface that the path of a light ray incident on one opposed surface of the material and the path of the same ray after it emerges from the material through the other opposed surface are not parallel.

(1) Note. A refracting surface of this subclass type comprises an interface between the material of the refractor and some other material (usually air) in which the speed of light is different.

(2) Note. A light pervious material having only parallel refracting surfaces, such as window pane, or concentric refracting surfaces, such as a nonfocusing or nondispersing headlight lenses, is not considered a refractor of this subclass type. For the loci of such devices, see the Search Notes below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

318, for a liquid type refractor.

363, for transparent globe type housings of the nonlight-modifying type. 375, for glass window-type housing closures.

376, for nonmodifying-light source protecting means made of transparent material.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

110+, for electric lights, per se, which include a refractor as an integral part thereof.

343, Communications: Radio Wave Antennas,

753+, for antennas with a spaced or external radio wave refractor; subclass 783 for waveguide-type antennas with an internal wave refraction means; and subclasses 909+ for radio wave refracting means, per se.

359, Optics: Systems (Including Communication) and Elements, for optical elements of general use, see

591+, for means for illuminating buildings interior with outside light, and subclasses 642+ for lenses.

404, Road Structure, Process, or Apparatus,

22+, for a pavement with light admitting means.

428, Stock Material or Miscellaneous Articles, 156+, for a stock material product in the form of a single or plural layer web or sheet including a component of varying thickness, and subclasses 426+ for a nonstructural composite web or sheet embodying one or more layers of glass.