US Patent No: 5,326,388

Number of patents in Portfolio can not be more than 2000

Color changing compositions

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Abstract

A multiple coloring composition system is disclosed whose coloring effect is changed upon treatment with a second coloring composition, once the second coloring composition has been deposited over the undercolor coloring composition. The multiple ink system comprises: (a) an undercolor aqueous coloring composition comprising an undercolor dye whose coloring ability is destroyed in the presence of a pH of about 10 or greater and/or by a reducing agent; and (b) an overcolor aqueous coloring composition comprising a colorant capable of maintaining its characteristic color in the presence of a pH of about 10 or greater and/or a reducing agent, a base in an amount sufficient to yield a pH of the overcolor composition of about 10 or greater, and/or a reducing agent.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CRAYOLA LLCEASTON, PA121

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Couch, Charlene R Richmond, VA 4 113
Miller, Richard E 3345 Reservoir Oval, Apt. 3H, Bronx, NY 10467 38 532

Cited Art

Patent Info (Count) # Cites Year
 
CANON KABUSHIKI KAISHA (3)
4,505,749 Method of forming color images 26 1983
4,778,525 Recording liquid 16 1987
4,973,499 Recording liquid having surface tension of at least 64 dyne/cm and viscosity of at most 2.5 cp at 25 degrees Celsius 27 1989
 
ALL-MARK CORPORATION, INC. (1)
4,681,471 Kit comprising multicolored fluid dispenser markers together with eradicating fluid dispenser, stamps and stamp pad 35 1984
 
CHARTPAK, INC. (1)
4,252,845 Graphic arts ink and eradicator combination 36 1978
 
CRAYOLA LLC (1)
5,232,494 Color changing compositions 38 1992
 
HUBDEAN LIMITED (1)
4,428,994 Anti-graffiti facing of walls or similar surfaces 18 1981
 
KONICA CORPORATION (1)
4,381,946 Ink composition for ink-jet recording 37 1981
 
NU-KOTE INTERNATIONAL, INC. (1)
4,213,717 Ball point pen, ink and its eradicator system 38 1978
 
PELIKAN GMBH (1)
5,006,171 Ink eradicator for inks containing triaryl methane dyestuffs 30 1989
 
PENTEL KABUSHIKI KAISHA (1)
4,557,618 Ink and eraser of the ink 77 1982
 
SAKURA COLOR PRODUCTS CORPORATION (1)
4,490,177 Dual color ink composition 29 1983
 
SHINSHU SEIKI KABUSHIKI KAISHA (1)
4,352,691 Liquid ink for printers 32 1980
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
4,708,817 Creative art medium for forming artistic expressions having a latent luminescent image pattern 23 1986

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
SANFORD, L.P. (11)
6,905,539 Black eradicable ink, methods of eradication of the same, eradicable ink kit, and eradicated ink complex 10 2003
7,083,665 Highlightable marking composition, method of highlighting the same, highlightable marking composition kit, and highlighted marking composition complex 2 2003
7,229,487 Writing instruments with eradicable inks and eradicating fluids 3 2004
7,442,725 Color changing correction fluid 1 2004
7,163,575 Water-based, resin-free and solvent-free eradicable ball-pen inks 5 2004
7,427,318 Highlightable and highlighted mixtures, marking instruments, and methods of using the same 0 2004
7,704,308 Method of highlighting with a reversible highlighting mixture, highlighting kit, and highlighted complex 0 2004
7,455,724 Decoder system 0 2005
7,488,380 Highlighting marking compositions, highlighting kits, and highlighted complexes 1 2006
8,110,615 Correction fluids 0 2006
7,452,146 Writing instruments with eradicable inks and eradicating fluids 3 2007
 
CRAYOLA LLC (7)
5,489,331 Color changing compositions using acids 20 1994
5,486,228 Washable color changing compositions 39 1994
5,498,282 Color changing pan paint compositions 25 1994
5,492,558 Color changing compositions for highlighters 24 1994
5,464,470 Color-changing marking composition system 30 1995
5,460,647 Color-changing marking composition system 24 1995
6,124,377 Marking system 20 1998
 
BEROL CORPORATION (5)
5,549,742 Assembly or set of different color inks and an assembly of writing instruments 11 1995
5,649,999 Ink eradicator system 17 1996
5,916,357 Eradicable inks 12 1997
6,149,721 Solvent-based pen inks 10 1999
6,221,432 Eradicable inks 11 1999
 
ELMER'S PRODUCTS, INC. (1)
5,814,579 Multicolor printing system 10 1996
 
FRANER, VICTOR (1)
5,548,010 Color dissipatable paint 14 1993
 
INEMEC COMPANY, INC. (1)
6,488,719 Method for controlling wet film thickness of clear coatings by means of color-dissipating dye 9 2001
 
J.S. STAEDTLER GMBH & CO. (1)
5,935,310 Ink for changeable color applications 16 1998
 
KAO CORPORATION (1)
5,702,510 Aqueous ink of pigment type 12 1996
 
L'OREAL (1)
7,939,053 Method of making up nails 0 2007
 
SOCIETE BIC (1)
8,182,595 Correcting fluid with drying indicator 0 2007
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (2)
6,004,057 Marking and eradicating instrument and method of use of same 13 1997
6,179,501 Marking and eradicating instrument and method of use of same 26 1999