1
Sheau Hwa Ma, Howard Matrick, Arthur C Shor, Harry J Spinelli, Michele E Shepard, Jerome Hochberg: Aqueous pigmented inks for ink jet printers. E I Du Pont de Nemours and Company, June 22, 1993: US05221334 (176 worldwide citation)

A pigmented ink for ink jet printers which comprises an aqueous carrier medium, pigment particles dispersed in an AB or BAB block copolymer having a hydrophilic segment and a segment that links to the pigment, and an effective amount of a surfactant sufficient to decrease the drying time of the ink. ...


2
Howard Matrick, Michele E Shepard, Young S You: Aqueous ink jet inks containing polyol/alkylene oxide condensates as cosolvents. E I Du Pont de Nemours and Company, January 19, 1993: US05180425 (113 worldwide citation)

An ink for ink jet printers which comprises an aqueous carrier medium, pigment dispersion or dye and a polyol/alkylene oxide condensate cosolvent which eliminates film formation on thermal ink jet resistor surfaces thereby eliminating non-uniformity in optical density. The cosolvent present at least ...


3
John L Stoffel, Keshava A Prasad, Ronald A Askeland, Michele E Shepard, Frank Drogo, Leonard Slevin, Mark S Hickman, Clayton L Holstun: Color ink-jet printer with pigment black and dye-based color inks. Hewlett Packard Company, April 28, 1998: US05745140 (13 worldwide citation)

A color ink-jet printer is provided, with one pen for dispensing black ink onto a print medium and at least one pen for dispensing color ink onto a print medium. The pen for dispensing black ink contains a pigment-based ink and the pen(s) for dispensing color ink contain a water-miscible dye-based i ...


4
Ronald A Askeland, Sheau Hwa Ma, Howard Matrick, Michele E Shepard: Aqueous anionic dye based ink jet inks. E I Du Pont de Nemours and Company, May 16, 1995: US05416145 (10 worldwide citation)

Ink jet ink compositions consisting essentially of an aqueous carrier medium; an anionic dye; and an anionic polymer have excellent decap and puddling behavior and may be used with a variety of ink jet printers such as continuous, piezoelectric, drop-on-demand and thermal or bubble jet drop-on-deman ...


5
John L Stoffel, Keshava A Prasad, Ronald A Askeland, Michele E Shepard, Frank Drogo, Leonard Slevin, Mark S Hickman, Clayton L Holstun: Printer with pen containing a low dot spread black ink and a high dot spread color ink. Hewlett Packard Company, Jerry R Potts, March 9, 1999: US05880758 (4 worldwide citation)

A color ink-jet printer is provided, with one pen for dispensing black ink onto a print medium and at least one pen for dispensing color ink onto a print medium. The pen for dispensing black ink is adapted to jet droplets of black ink of a first volume and the pen(s) for dispensing color ink are ada ...