Manual of U.S. Patent Classification
as of June 30, 2000

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

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

Patents classified in a subclass may be accessed by clicking on the " " icon following the subclass number, below.

( please note that links to definitions and classified patents may not be available for some classes and subclasses )

For search strategies, please refer to the Classification Index Explanation of Data web page.

Subclass		Title
ClassTitle		===> RECORD RECEIVER HAVING PLURAL INTERACTIVE LEAVES OR A COLORLESS COLOR FORMER, METHOD OF USE, OR DEVELOPER THEREFOR
200		HAVING A COLORLESS COLOR-FORMER, DEVELOPER THEREFOR, OR METHOD OF USE
201		. Method of use, kit, or combined with marking instrument or organ
202		. Color developed by mere decomposition of color-former
203		. Duplicating master
204		. Plural colors or plural diverse systems
205		. Having a color desensitizer
206		. Component noncoextensive with substrate
207		. Having nonreactant particles of defined size
208		. Having constituent defined in terms of melting temperature
209		. Having nonchromogenic liquid spread-control or transfer-improving agent or component, color modifier, stabilizer or preservative
210		. Heavy metal reactant
211		. . Metal of atomic number 22-30
212		. . . Zinc
213		. Identified solvent or dispersant for color-former, other than mere mineral oil
214		. Identified reactant isolating material or capsule wall material or binder resin
215		. . Synthetic resin capsule walls
216		. Identified organic electron acceptor (developer) other than phenolic resin
217		. . And identified color-former
218		. Identified color-former
219		. . And identified inorganic electron acceptor (developer), other than mere clay
220		. . Furanone moiety-containing
221		. . . Fluoran or derivative
222		. . . . Molecule having plural fluorans or more than three rings fused together
223		. . Azole moiety-containing
224		. . Polyphenylmethane moiety-containing
225		. Identified electron acceptor (developer)
226		. Spatial relationship specified between color-former and developer
227		HAVING PLURAL INTERACTIVE LEAVES

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Last Modified: 6 October 2000