US PATENT SUBCLASS 427 / 163.4
.~.~ Retroreflector (e.g., light reflecting small spherical beads, etc.)

Current as of: June, 1999
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427 /   HD   COATING PROCESSES

162  DF  OPTICAL ELEMENT PRODUCED {2}
163.1  DF  .~ Polarizer, windshield, optical fiber, projection screen, or retroreflector {3}
163.4.~.~ Retroreflector (e.g., light reflecting small spherical beads, etc.)

DEFINITION

Classification: 427/163.4

Retroreflector (e.g., light reflecting small spherical beads, etc.):

(under subclass 163.1) Processes wherein the optical element comprises (a) a reflecting substrate coated with small spheres or (b) small spheres coated with reflecting material which may be applied to a substrate.

(1) Note. This subclass provides for applying small spherical reflectors (e.g., balls, beads, microspheres, retroreflectors, etc.) to a base to make it reflective.

SEE OR SEARCH THIS CLASS, SUBCLASS:

137, for applying reflective material to a roadway.