US PATENT SUBCLASS 356 / 239.1
.~ Transparent or translucent material

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


356 /   HD   OPTICS: MEASURING AND TESTING

237.1  DF  INSPECTION OF FLAWS OR IMPURITIES {6}
239.1.~ Transparent or translucent material {4}
239.2  DF  .~.~> Optical element (e.g., contact lens, prism, filter, lens, etc.)
239.3  DF  .~.~> Patterned surface
239.4  DF  .~.~> Containers (e.g., bottles) {2}
239.7  DF  .~.~> Surface condition {1}

DEFINITION

Classification: 356/239.1

Transparent or translucent material:

(under subclass 237.1) Inspection of imperfections or impurities wherein the material being inspected allows the transmittance of light.

(1) Note. For classification here the light must pass completely through the material and be viewed on the issuing side. Mere internal reflecting within the material is not sufficient for classification here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

73.1, for the optical inspection of an optical fiber or waveguide.

432+, for measuring light transmission through a material.

SEE OR SEARCH CLASS

108, Horizontally Supported Planar Surfaces,

23, for illuminated viewing tables.