US PATENT SUBCLASS 264 / 1.21
.~ Nonresinous material only (e.g., ceramic, etc.)

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

1.1  DF  OPTICAL ARTICLE SHAPING OR TREATING {11}
1.21.~ Nonresinous material only (e.g., ceramic, etc.) {2}
1.22  DF  .~.~> Scandium (Sc), yttrium (Y), or rare earth containing (i.e., atomic numbers 21, 39, or 57-72)
1.23  DF  .~.~> Halogen containing

DEFINITION

Classification: 264/1.21

Nonresinous material only (e.g., ceramic, etc.):

(under subclass 1.1) Processes directed to shaping or treating an optical article which is composed solely of nonresinous material.

(1) Note. The application of a nonresinous coating to an optical article is not provided for here. Such subject matter is provided for in subclasses below.

(2) Note. Attention is directed to the definition of Class 520, Synthetic Resins or Natural Rubbers, for the distinction between the terms "resinous" and "nonresinous."

SEE OR SEARCH THIS CLASS, SUBCLASS:

1.7, for processes which include the application of a nonresinous coating to an optical article.