Patents by Inventor Dennis P Parazak
Dennis P Parazak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10273376Abstract: An example of an ink composition includes a pigment, an anionic polymeric dispersant, polyurethane, a co-solvent, a surfactant, tristyrylphenol ethoxylate, and a balance of water. The tristyrylphenol ethoxylate is present in an amount ranging from about 0.1 wt % to about 2 wt % of a total wt % of the ink composition.Type: GrantFiled: July 30, 2014Date of Patent: April 30, 2019Assignee: Hewlett-Packard Development Company, L.P.Inventors: Dennis P. Parazak, Gregg A. Lane, Fereshteh Khorrami, Dennis Z. Guo, Benjamin Abelovski
-
Publication number: 20170145238Abstract: An example of an ink composition includes a pigment, an anionic polymeric dispersant, polyurethane, a co-solvent, a surfactant, tristyrylphenol ethoxylate, and a balance of water. The tristyrylphenol ethoxylate is present in an amount ranging from about 0.1 wt % to about 2 wt % of a total wt % of the ink composition.Type: ApplicationFiled: July 30, 2014Publication date: May 25, 2017Inventors: Dennis P. Parazak, Gregg A. Lane, Fereshteh Khorrami, Dennis Z. Guo, Benjamin Abelovski
-
Patent number: 9493013Abstract: An inkjet ink set includes a black ink, a yellow ink, a cyan ink, and a magenta ink. The magenta ink includes an ink vehicle including a polyurethane binder, and a dispersed magenta pigment in the ink vehicle. The magenta pigment is chosen from Pigment Red 282.Type: GrantFiled: January 31, 2011Date of Patent: November 15, 2016Assignee: Hewlett-Packard Development Company, L.P.Inventors: Xiaohe Chen, Pradeep Kumar Koyadan Kizhakkedath, Dennis P. Parazak, Keshava A. Prasad, Savka Ilieva Stoeva, Yi-Hua Tsao, Tze Hwei Tseeng, Ervin Mubarekyan
-
Patent number: 9016830Abstract: An inkjet cleaning unit includes a reservoir housing an inkjet wiping fluid that includes a non-wettable material; and an applicator wick fluidly coupled to the reservoir, in which the applicator wick is configured to transport the inkjet wiping fluid from the reservoir to a surface of an inkjet material dispenser. A method for cleaning an inkjet material dispenser includes applying an inkjet wiping fluid from a reservoir housing the inkjet wiping fluid to a surface of the inkjet material dispenser; in which the inkjet wiping fluid includes a non-wettable material; and in which an applicator wick is fluidly coupled to the reservoir to transport the inkjet wiping fluid from the reservoir to the surface of the inkjet material dispenser.Type: GrantFiled: August 26, 2009Date of Patent: April 28, 2015Assignee: Hewlett-Packard Development Company, L.P.Inventors: Dennis P. Parazak, Dustin W. Blair
-
Patent number: 8777390Abstract: A fluid dispensing system for ink-jet printing can comprise an ink-jet ink including anionic dye colorant and from 0.05 wt % to 1.0 wt % of an anionic dispersant polymer, and a fixer composition including a cationic crashing agent that is with a component of the ink-jet ink. The fixer composition can be stored separately from the ink-jet ink, and the fluid dispensing system can be configured for overprinting or underprinting the fixer composition with respect to the ink-jet ink.Type: GrantFiled: April 15, 2004Date of Patent: July 15, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Paul Bruinsma, Dennis P. Parazak, Lidia Calvo Garcia
-
Publication number: 20130307914Abstract: An inkjet ink set includes a black ink, a yellow ink, a cyan ink, and a magenta ink. The magenta ink includes an ink vehicle including a polyurethane binder, and a dispersed magenta pigment in the ink vehicle. The magenta pigment is chosen from Pigment Red 282.Type: ApplicationFiled: January 31, 2011Publication date: November 21, 2013Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Xiaohe Chen, Pradeep Kumar Koyadan Kizhakkedath, Dennis P. Parazak, Keshava A. Prasad, Savka Ilieva Stoeva, Yi-Hua Tsao, Tze Hwei Tseeng, Ervin Mubarekyan
-
Patent number: 8268064Abstract: Compositions, systems, and methods for ink-jet printing having improved black to color bleed control, reduced wicking, and/or reduced halo are described. The composition can include a functionalized carbon pigment dispersed in an ink vehicle. The carbon pigment includes functional groups chemically attached thereto. Suitable functional groups includes an aromatic ring structure having multiple carboxyl groups (or salts thereof) attached to the aromatic ring structure, wherein at least two of the multiple carboxyl groups are positioned on adjacent carbon atoms of the aromatic ring structure.Type: GrantFiled: September 28, 2006Date of Patent: September 18, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Kai-Kong Iu, Dennis P Parazak, Dennis Guo, Xiaohe Chen, Rodney Stramel, Howard A. Doumaux
-
Patent number: 8188159Abstract: An inkjet ink comprising polymeric fluoro-polymeric additives providing enhanced pen and print quality performance.Type: GrantFiled: October 13, 2005Date of Patent: May 29, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Kai-Kong Iu, Dennis P. Parazak, James M. Pingel
-
Patent number: 7846245Abstract: Ink, ink sets, and methods of printing are provided. The inks can include a plurality of dyes such that upon printing on a print medium, the printed ink or inks can maintain a neutral color, defined by an a* value from about ?1 to about 3 and having a b* value from about 3 to about ?15. This neutral color can be maintained such that the printed ink or image has these a*b* values for substantially all L* values ranging from about 25 to about 75, or even from 0 to 95.Type: GrantFiled: November 2, 2006Date of Patent: December 7, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Dennis P Parazak, Eduardo Amela
-
Publication number: 20090315942Abstract: An inkjet cleaning unit includes a reservoir housing an inkjet wiping fluid that includes a non-wettable material; and an applicator wick fluidly coupled to the reservoir, in which the applicator wick is configured to transport the inkjet wiping fluid from the reservoir to a surface of an inkjet material dispenser. A method for cleaning an inkjet material dispenser includes applying an inkjet wiping fluid from a reservoir housing the inkjet wiping fluid to a surface of the inkjet material dispenser; in which the inkjet wiping fluid includes a non-wettable material; and in which an applicator wick is fluidly coupled to the reservoir to transport the inkjet wiping fluid from the reservoir to the surface of the inkjet material dispenser.Type: ApplicationFiled: August 26, 2009Publication date: December 24, 2009Inventors: Dennis P. Parazak, Dustin W. Blair
-
Patent number: 7500742Abstract: Disclosed herein are method and systems for printing a reactive ink and a fixer or second reactive ink onto a substrate from a single orifice plate, wherein orifice plate comprising at least two orifices; wherein at least one orifice prints a first reactive ink, and other orifice prints a fixer or second reactive ink. The reactive inks and the fixer reacts to form a precipitate which soluble in at least one of the fixer or the inks.Type: GrantFiled: October 22, 2003Date of Patent: March 10, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventors: Dennis P Parazak, James A. Mott, Melissa D. Lee, James Pingel
-
Patent number: 7387362Abstract: The present invention is drawn to methods and architecture for depositing one or more self-assembled monolayer(s) onto a print nozzle orifice plate surface. In particular, the servicing fluid includes a self-assembled monolayer-forming agent and is applied using a wiper. The wiper is configured to service and maintain an orifice plate surface having a pre-existing self-assembled monolayer, or for initial application of a self-assembled monolayer to an orifice plate.Type: GrantFiled: March 18, 2005Date of Patent: June 17, 2008Assignee: Hewlett-Packard Development Company, L.P.Inventor: Dennis P. Parazak
-
Publication number: 20080107819Abstract: Ink, ink sets, and methods of printing are provided. The inks can include a plurality of dyes such that upon printing on a print medium, the printed ink or inks can maintain a neutral color, defined by an a* value from about ?1 to about 3 and having a b* value from about 3 to about ?15. This neutral color can be maintained such that the printed ink or image has these a*b* values for substantially all L* values ranging from about 25 to about 75, or even from 0 to 95.Type: ApplicationFiled: November 2, 2006Publication date: May 8, 2008Inventors: Dennis P. Parazak, Eduardo Amela
-
Patent number: 7246896Abstract: Systems and methods for providing smudge resistant and durable ink-jet images are provided. Specifically, a system for printing durable ink-jet ink images can comprise a first printhead containing a fixer composition including a charged fixer component, wherein the first printhead is configured for ink-jet printing the fixer composition on a substrate. The system can further comprise a second printhead containing an ink-jet ink, wherein the second printhead is configured for ink-jet printing the ink-jet ink composition over the fixer composition. The ink-jet ink can also include a colorant carrying an opposite charge with respect to the charged fixer component. A third printhead containing a polymer overcoat composition can also be present, and can be configured for ink-jet printing the polymer overcoat composition over ink-jet ink composition. The polymer of the polymer overcoat composition can also carry an opposite charge with respect to the charged fixer component.Type: GrantFiled: April 12, 2004Date of Patent: July 24, 2007Assignee: Hewlett-Packard Development Company L.P.Inventors: Ronald A. Askeland, Kai-Kong Iu, Dennis P. Parazak, Rodney Stramel
-
Patent number: 6648464Abstract: The present invention is drawn to systems and methods for remediating printhead cross-contamination wherein at least one of the ink-jet inks has undergone crashing. Specifically, a method of minimizing or reversing crashing of a first ink-jet ink that has reacted with a second ink-jet ink on a printhead can comprise the steps of dispensing a reactive cleaning fluid that is chemically configured to react with the first ink-jet ink after crashing; and cleaning a printhead having a crashed inkjet ink thereon with the reactive cleaning fluid, thereby minimizing or reverse crashing at the printhead.Type: GrantFiled: September 6, 2002Date of Patent: November 18, 2003Assignee: Hewlett-Packard Development Company, L.P.Inventor: Dennis P Parazak
-
Patent number: 6572690Abstract: Ink-jet ink compositions are described comprising a mixture of succinic acid and at least one second organic acid. The ink-jet ink compositions alleviate color bleed, and lead to reliable pen performance when incorporated in a pen architecture.Type: GrantFiled: March 5, 2001Date of Patent: June 3, 2003Assignee: Hewlett-Packard Development Company, L.P.Inventors: Zia Rehman, Dennis P Parazak, Raymond J Adamic
-
Patent number: 6540821Abstract: Color ink sets for use in printer systems are provided and formulated to provide improved plain paper and special media performance while maintaining good printing characteristics. The inks and ink sets of the present invention exhibit excellent color performance and lightfastness across a range of media, robust K/Y bleed resistance on plain paper at fast print speeds, as well as excellent printability and reliability. A specific dye set for formulating yellow, magenta, and cyan inks comprises a mixture of acid yellow 23 (AY23) and direct yellow 132 (DY132), a mixture of a cyan dye compound having the formula: —(SO3H)2.7 CuPc—(SO2NH2)0.5 —(SO2NH(C2H4OH)0.8 wherein Pc represents a phthalocyanine nucleus and acid blue 9; and a magenta dye compound having formula: wherein Q is a cation.Type: GrantFiled: May 4, 2001Date of Patent: April 1, 2003Assignee: Hewlett-Packard CompanyInventors: Raymond J Adamic, Mary E Austin, Hiang P Lauw, Dennis P Parazak, Zia Rehman
-
Publication number: 20030015120Abstract: Color ink sets for use in printer systems are provided and formulated to provide improved plain paper and special media performance while maintaining good printing characteristics. The inks and ink sets of the present invention exhibit excellent color performance and lightfastness across a range of media, robust K/Y bleed resistance on plain paper at fast print speeds, as well as excellent printability and reliability.Type: ApplicationFiled: May 4, 2001Publication date: January 23, 2003Inventors: Raymond J. Adamic, Mary E. Austin, Hiang P. Lauw, Dennis P. Parazak, Zia Rehman
-
Patent number: 6500880Abstract: The ink set of this invention comprises at least two inks, one of which contains a pH sensitive polymer and pigment colorant with dispersant. A second ink is provided which comprises incompatible inorganic or organic salts or has an appropriate pH. The polymer precipitates onto a medium upon contact with the second ink, thereby providing improved bleed control.Type: GrantFiled: October 26, 2000Date of Patent: December 31, 2002Assignee: Hewlett-Packard ComapnyInventor: Dennis P. Parazak
-
Publication number: 20020162481Abstract: Ink-jet ink compositions are described comprising a mixture of succinic acid and at least one second organic acid. The ink-jet ink compositions alleviate color bleed, and lead to reliable pen performance when incorporated in a pen architecture.Type: ApplicationFiled: March 5, 2001Publication date: November 7, 2002Inventors: Zia Rehman, Dennis P. Parazak, Raymond J. Adamic