US PATENT SUBCLASS 136 / 257
.~.~.~ Luminescent layer or optical filter

Current as of: June, 1999
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136 /   HD   BATTERIES: THERMOELECTRIC AND PHOTOELECTRIC

243  DF  PHOTOELECTRIC {2}
252  DF  .~ Cells {12}
256  DF  .~.~ Contact, coating, or surface geometry {1}
257.~.~.~ Luminescent layer or optical filter

DEFINITION

Classification: 136/257

Luminescent layer or optical filter:

(under subclass 256) Device in which a coating has the property of absorbing light of selected frequency or of re-emitting absorbed light.

SEE OR SEARCH THIS CLASS, SUBCLASS:

247, for a photocell with a fluorescent concentrator.