US Patent No: 6,149,721

Number of patents in Portfolio can not be more than 2000

Solvent-based pen inks

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Importance

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Abstract

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Solvent-based pen inks are provided. The inks include an acid dye and a solvent system that includes an oxa acid solvent, the oxa acid solvent functioning as the primary solvent for the acid dye. Preferred inks are eradicable, and include an acid dye that decolorizes if contacted with a decolorizing compound.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
BEROL CORPORATIONFREEPORT, IL228

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hopson, Russell E Fairfax, VA 3 33
Wang, Yichun Canton, MA 18 67

Cited Art Landscape

Patent Info (Count) # Cites Year
 
CRAYOLA LLC (7)
5,116,410 Washable dye-containing composition 23 1990
5,232,494 Color changing compositions 39 1992
5,352,282 Color changing compositions 23 1993
5,326,388 Color changing compositions 32 1993
5,486,228 Washable color changing compositions 40 1994
5,460,647 Color-changing marking composition system 25 1995
5,464,470 Color-changing marking composition system 32 1995
 
NU-KOTE INTERNATIONAL, INC. (3)
4,213,717 Ball point pen, ink and its eradicator system 38 1978
4,227,930 Ball point pen, ink, and its eradicator system 37 1978
4,228,028 Ball point pen, ink, and its eradicator system 29 1978
 
BEROL CORPORATION (2)
5,378,752 Ink eradicator system including film forming polymer 17 1992
5,649,999 Ink eradicator system 17 1996
 
Milliken Research Corporation (2)
5,043,013 Washable ink compositions 54 1989
5,059,244 Fugitive colorant and washable ink compositions 36 1990
 
All-Mark Corporation, Inc. (1)
4,681,471 Kit comprising multicolored fluid dispenser markers together with eradicating fluid dispenser, stamps and stamp pad 37 1984
 
BINNEY & SMITH INC. (1)
5,478,382 Color changing compositions for use on non-porous surfaces 25 1994
 
CHARTPAK, INC. (1)
4,252,845 Graphic arts ink and eradicator combination 37 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 80 1982
 
SAKURA COLOR PRODUCTS CORPORATION (1)
4,578,117 Erasable ink composition 32 1984
 
XEROX CORPORATION (1)
5,700,316 Acoustic ink compositions 41 1996
 
Other [Check patent profile for assignment information] (3)
5,324,131 Emphasizing ink removing applicator and ink removal method 19 1988
5,427,278 Highlighting-ink remover applicator 19 1994
5,711,790 Marking composition 5 1996

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
SANFORD, L.P. (10)
6,905,539 Black eradicable ink, methods of eradication of the same, eradicable ink kit, and eradicated ink complex 12 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
7,488,380 Highlighting marking compositions, highlighting kits, and highlighted complexes 5 2006
8,110,615 Correction fluids 0 2006
7,452,146 Writing instruments with eradicable inks and eradicating fluids 4 2007