US PATENT SUBCLASS 359 / 252
.~.~.~.~.~ With particular medium or state of the medium

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

237  DF  OPTICAL MODULATOR {3}
238  DF  .~ Light wave temporal modulation (e.g., frequency, amplitude, etc.) {3}
240  DF  .~.~ Changing bulk optical parameter {5}
245  DF  .~.~.~ Electro-optic {11}
246  DF  .~.~.~.~ Modulation of polarized light via modulating input signal {10}
252.~.~.~.~.~ With particular medium or state of the medium {1}
253  DF  .~.~.~.~.~.~> Liquid medium

DEFINITION

Classification: 359/252

With particular medium or state of the medium:

(under subclass 246) Subject matter wherein the details of the medium structure, state of the medium, shape of the medium, or treatment of the medium are recited.

(1) Note. For classification herein, there should be more than just the recitation of the name or abbreviation of the name of the material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

251, where details of the medium are combined with a particular field direction.

488, for a particular medium used for reflectively or refractively polarizing light.

SEE OR SEARCH CLASS

23, Chemistry: Physical Processes, for preparation or treatment of nonmetallic elements involving only physical treatments.

252, Compositions, for compositions, per se.

264, Plastic and Nonmetallic Article Shaping or Treating: Processes, for melt shaping or treatment of nonmetallic materials.

423, Chemistry of Inorganic Compounds, for nonmetallic elements and for processes for producing nonmetallic elements involving a chemical reaction.