US PATENT SUBCLASS 503 / 200
HAVING A COLORLESS COLOR-FORMER, DEVELOPER THEREFOR, OR METHOD OF USE

Current as of: June, 1999
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Internet Version by PATENTEC © 1999      Terms of Use


503 /   HD   RECORD RECEIVER HAVING PLURAL INTERACTIVE LEAVES OR A COLORLESS COLOR FORMER, METHOD OF USE, OR DEVELOPER THEREFOR

200HAVING A COLORLESS COLOR-FORMER, DEVELOPER THEREFOR, OR METHOD OF USE {16}
201  DF  .~> Method of use, kit, or combined with marking instrument or organ
202  DF  .~> Color developed by mere decomposition of color-former
203  DF  .~> Duplicating master
204  DF  .~> Plural colors or plural diverse systems
205  DF  .~> Having a color desensitizer
206  DF  .~> Component noncoextensive with substrate
207  DF  .~> Having nonreactant particles of defined size
208  DF  .~> Having constituent defined in terms of melting temperature
209  DF  .~> Having nonchromogenic liquid spread-control or transfer-improving agent or component, color modifier, stabilizer or preservative
210  DF  .~> Heavy metal reactant {1}
213  DF  .~> Identified solvent or dispersant for color-former, other than mere mineral oil
214  DF  .~> Identified reactant isolating material or capsule wall material or binder resin {1}
216  DF  .~> Identified organic electron acceptor (developer) other than phenolic resin {1}
218  DF  .~> Identified color-former {4}
225  DF  .~> Identified electron acceptor (developer)
226  DF  .~> Spatial relationship specified between color-former and developer

DEFINITION

Classification: 503/200

HAVING A COLORLESS COLOR FORMER, DEVELOPER THEREFORE OR METHOD OF USE:

Material which is used to form a visible record by causing a substance to react chemically to form a color where there was no color, or to form a different color from the original, or a method of using such material.

(1) Note. Usually the color change occurs when a colorless chemical entity, called a "color former" is brought to a different state of electronic equilibrium by contacting the entity with a "developer generally are kept separate on the unused recording material, for example, by confining each reactant to a different, mating surface of a plurality of sheets, by confining one or more of the reactants to "microcapsules", etc. The reactants are brought into contact by the application of pressure, heat, etc., to localized areas of the recording material.

SEE OR SEARCH CLASS

8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers,

636+, for a dye composition in general.

264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

4.1+, for a liquid encapsulation process to make a microcapsule.

428, Stock Material or Miscellaneous Articles, 402.2+, and 402.24 for microcapsules with liquid and solid cores respectively. However, if the core material is disclosed to be an expanding (blowing) agent see Class 521, subclass 50, (4) Note for a limitation to those subclasses.