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Class Information
Number: 503
Name: Record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor >
Description: Material which is used to form a visible record by a reactive or interactive, usually chemical or physico-chemical, phenomenon or a method of using such a material to form a record. The formation phenomenon is one of the following: (a) The chemical decomposition of a colorless substance to form a substance having color; (b) the chemical combination of two or more colorless chemical moieties to produce a substance having color; (c) The further chemical change of (a) or (b) above, to form a color different from an original color; and (d) The chemical or physico-chemical complementarity between the bottom surface of one sheet of a record receiver and the top surface of an adjacent sheet with which the first sheet id associated.










Class Number Class Name No. of Patents
503/200

Having a colorless color-former, developer therefor, or method of use

555
503/202

Color developed by mere decomposition of color-former

80
503/206

Component noncoextensive with substrate

149
503/203

Duplicating master

16
503/205

Having a color desensitizer

90
503/208

Having constituent defined in terms of melting temperature

281
503/209

Having nonchromogenic liquid spread-control or transfer-improving agent or component, color modifier, stabilizer or preservative

485
503/207

Having nonreactant particles of defined size

288
503/210

Heavy metal reactant

141
503/211

Metal of atomic number 22-30

145
503/212

Zinc

206
503/218

Identified color-former

205
503/219

And identified inorganic electron acceptor (developer), other than mere clay

58
503/223

Azole moiety-containing

128
503/220

Furanone moiety-containing

191
503/221

Fluoran or derivative

275
503/222

Molecule having plural fluorans or more than three rings fused together

20
503/224

Polyphenylmethane moiety-containing

88
503/225

Identified electron acceptor (developer)

505
503/216

Identified organic electron acceptor (developer) other than phenolic resin

551
503/217

And identified color-former

374
503/214

Identified reactant isolating material or capsule wall material or binder resin

376
503/215

Synthetic resin capsule walls

334
503/213

Identified solvent or dispersant for color-former, other than mere mineral oil

168
503/201

Method of use, kit, or combined with marking instrument or organ

525
503/204

Plural colors or plural diverse systems

199
503/226

Spatial relationship specified between color-former and developer

718
503/227

Having plural interactive leaves

1707
 
 
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