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An Gong Yeh, Michael J Eiseman, Robert Paul Held, James L Hohman, Dhiren V Patel, Yia Ching Ray, Harry Joseph Spinelli, Sandra L Witman: Self-dispersing pigment and process of making and use of same. E I du Pont de Nemours and Company, Bart E Lerman, February 8, 2005: US06852156 (48 worldwide citation)

A process is provided in which a pigment is oxidated with ozone in an aqueous environment in which the mixture of ozone, water and pigment is subjected to a dispersive mixing operation; and/or the pH of the mixture is maintained in a range of 6-8, whereby the pigment is self-dispersing and preferabl ...


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Waifong Liew Anton, Harry Joseph Spinelli, Anjali Abhimanyu Patil: Acrylic polymer compounds. E I du Pont de Nemours and Company, Hilmar L Fricke, August 25, 1998: US05798426 (29 worldwide citation)

An acrylic polymer of polymerized monomers of about 55-80% by weight of an alkyl methacrylate having 1-12 carbon atoms in the alkyl group, and alkyl acrylate having 1-12 carbon atoms in the alkyl group, substituted or unsubstituted aryl methacrylate or acrylate, substituted or unsubstituted alicycli ...


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Loretta Ann Grezzo Page, Harry Joseph Spinelli, Waifong Liew Anton: Ink jet inks containing linear polymer additives. E I du Pont de Nemours and Company, Joseph A Tessari, March 21, 2000: US06040358 (15 worldwide citation)

Inks for ink jet printers contain an aqueous carrier medium; a colorant that is insoluble in the aqueous carrier, a polymer dispersant; and a linear polymer additive selected from the group consisting of an water soluble, elastomeric ABA block polymer comprising an elastomeric B block and non-elasto ...


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Waifong Liew Anton, Milan Bohuslav Bednarek, Robert Paul Held, Sheau Hwa Ma, Joseph Edward Reardon, Arthur Charles Shor, Harry Joseph Spinelli, Soodabeh Tronson: Ink jet inks containing emulsion polymer additives stabilized with structured polymers. E I du Pont de Nemours and Company, Joseph A Tessari, February 1, 2000: US06020400 (9 worldwide citation)

Inks for ink jet printers containing an aqueous carrier medium; a pigment; a polymeric dispersant; and an emulsion polymer additive stabilized with a structured polymer are stable, have low viscosity, exhibit excellent print quality, provide excellent smear resistance after drying, have good decap a ...


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John Lawrence Stoffel, Arthur Charles Shor, Harry Joseph Spinelli, Sheau Hwa Ma, Howard Matrick, Mark Leland Choy, Loren Eugene Johnson: Process for alleviating bleed and improving color in printed elements. E I du Pont de Nemours and Company, September 1, 1998: US05801738 (9 worldwide citation)

A process for alleviating bleed and improving color in printed elements comprises applying an anionic printing liquid and a cationic printing liquid to a substrate adjacent to one another, wherein at least one of the printing liquids contains a polymer and reacting the anionic and cationic printing ...


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Harry Joseph Spinelli: Aqueous ink jet ink compositions. E I du Pont de Nemours and Company, June 30, 1998: US05772741 (6 worldwide citation)

Ink jet ink compositions comprising an aqueous continuous phase; a discontinuous, non-aqueous phase comprising a pigment, a dispersant and a non-aqueous carrier; and at least one emulsifier exhibit excellent resistance to water and highliter smear and dramatically improve bleed in printed elements.


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Harry Joseph Spinelli, Richard Douglas Bauer: Inkjet printing with pigmented inks. E I du Pont de Nemours and Company, Simon L Xu, March 15, 2011: US07905589

Method for printing high gloss, high DOI (distinctness of image) images with pigmented inkjet inks. The method comprises printing the pigmented inks in one pass onto absorbent glossy media.


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Christian Jackson, Harry Joseph Spinelli: Inkjet printing method. E I Du Pont de Nemours And Company, Legal Patent Records Center, December 23, 2004: US20040257417-A1

This invention pertains to a method of inkjet printing, in particular to a method of inkjet printing designed for high speed, high quality and high resolution. The method employs a printhead array which is fixed in position and which ejects ink droplets of about 1-2 pL, and dye-based inks having spe ...


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Harry Joseph Spinelli: Aqueous ionically stabilized dispersions. Ei Du Pont de Nemours And Company, E I Du Pont de Nemours And Company, Legal Patent Records Center, December 27, 2007: US20070299198-A1

Ionically stabilized dispersions are described that are substantially free of steric stabilization of the pigment. These ionically stabilized dispersions are obtained from polymeric dispersants where the hydrophilic components are minimized. These stabilized dispersions can be utilized to prepare in ...