Patents by Inventor Ajay K. Suthar
Ajay K. Suthar 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).
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Patent number: 11279839Abstract: A magenta dye-based ink composition and a method for improving the print qualities of a magenta dye-based ink composition. The magenta dye-based ink composition includes one or more red dye(s) and a minor but effective amount of black dye. A weight ratio of red dye(s) to black dye in the ink composition ranges from about 20:1 to about 100:1.Type: GrantFiled: January 30, 2018Date of Patent: March 22, 2022Inventors: Keiichi Edaka, Ajay K. Suthar
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Publication number: 20210315786Abstract: A cosmetic ink set, method for printing and printer containing the ink set. The ink set includes a cyan ink comprising a cosmetically approved cyan dye in an amount ranging from about 2 to about 6 wt. % based on a total weight of the cyan ink; a magenta ink comprising a cosmetically approved red dye in an amount ranging from about 0.5 to about 3 wt. % based on a total weight of the magenta ink; and a yellow ink comprising a cosmetically approved yellow dye in an amount ranging from about 4 to about 8 wt. % based on a total weight of the yellow ink, wherein each of the cyan ink, magenta ink and yellow ink is devoid of a pigment ink, a 1,2-benzisothiazoline compound, and a 2-pyrrolidone.Type: ApplicationFiled: June 24, 2021Publication date: October 14, 2021Applicant: Funai Electric Co., Ltd.Inventor: Ajay K. SUTHAR
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Patent number: 11071700Abstract: A cosmetic ink set, method for printing and printer containing the ink set. The ink set includes at least two of a) a cyan ink that includes a cosmetically approved cyan dye; b) a magenta ink that includes a cosmetically approved magenta dye; and c) a yellow ink that includes a cosmetically approved yellow dye. Each of the cyan ink, magenta ink and yellow ink contains 1) a cosmetically approved humectant; 2) a cosmetically approved surfactant; and 3) water in an amount sufficient to provide 100 wt. % for each of the cyan, magenta and yellow inks based on a total weight of the ink.Type: GrantFiled: August 27, 2018Date of Patent: July 27, 2021Inventors: Keiichi Edaka, Ajay K. Suthar
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Publication number: 20190233669Abstract: A magenta dye-based ink composition and a method for improving the print qualities of a magenta dye-based ink composition. The magenta dye-based ink composition includes one or more red dye(s) and a minor but effective amount of black dye. A weight ratio of red dye(s) to black dye in the ink composition ranges from about 20:1 to about 100:1.Type: ApplicationFiled: January 30, 2018Publication date: August 1, 2019Inventors: Keiichi EDAKA, Ajay K. SUTHAR
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Publication number: 20180360711Abstract: A cosmetic ink set, method for printing and printer containing the ink set. The ink set includes at least two of a) a cyan ink that includes a cosmetically approved cyan dye; b) a magenta ink that includes a cosmetically approved magenta dye; and c) a yellow ink that includes a cosmetically approved yellow dye. Each of the cyan ink, magenta ink and yellow ink contains 1) a cosmetically approved humectant; 2) a cosmetically approved surfactant; and 3) water in an amount sufficient to provide 100 wt. % for each of the cyan, magenta and yellow inks based on a total weight of the ink.Type: ApplicationFiled: August 27, 2018Publication date: December 20, 2018Applicant: FUNAI ELECTRIC CO., LTDInventors: Keiichi EDAKA, Ajay K. SUTHAR
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Publication number: 20180037764Abstract: An ink-set for ink jet printing. The ink-set includes a cyan ink composition comprising from about 1.0:1.0 to about 1.0:5.0 by weight cyan pigment to cyan dye in the cyan ink composition; a magenta ink composition comprising from about 1.0:1.5 to about 1.0:7.0 by weight magenta pigment to magenta dye; a yellow ink composition comprising 0:1.0 yellow by weight yellow pigment to yellow dye; and a black ink composition comprising from about 1.0:1.0 to about 1.0:1.5 black pigment to black dye.Type: ApplicationFiled: August 2, 2016Publication date: February 8, 2018Inventors: Keiichi EDAKA, Mark A. CHAMBERS, Ajay K. SUTHAR
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Patent number: 9694576Abstract: Methods for ejecting fluids having a viscosity ranging from about 20 mPa-sec to about 100 mPa-sec at 22° C. from a micro-fluid ejection head. The methods include the steps of applying a heat signal to the ejection head for a first period of time to heat the ejection head to a first temperature that is about 20° C. above a steady state fluid ejection temperature for continuous or intermittent fluid ejection from the ejection head; and subsequently, applying a firing signal to ejection heaters on the ejection head during which fluid ejection from the ejection head occurs.Type: GrantFiled: November 13, 2015Date of Patent: July 4, 2017Assignee: Funai Electric Co., Ltd.Inventors: Sam Norasak, Stephen T. Olson, Ajay K. Suthar
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Patent number: 9676949Abstract: An ink composition including at least one aqueous carrier, at least one color dye, and at least one polymeric dispersant selected such that the ink composition minimizes debris in a printhead.Type: GrantFiled: April 21, 2016Date of Patent: June 13, 2017Assignee: Funai Electric Co., Ltd.Inventors: Ajay K. Suthar, Steve Olson, Sam Norasak
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Publication number: 20170136766Abstract: Methods for ejecting fluids having a viscosity ranging from about 20 mPa-sec to about 100 mPa-sec at 22° C. from a micro-fluid ejection head. The methods include the steps of applying a heat signal to the ejection head for a first period of time to heat the ejection head to a first temperature that is about 20° C. above a steady state fluid ejection temperature for continuous or intermittent fluid ejection from the ejection head; and subsequently, applying a firing signal to ejection heaters on the ejection head during which fluid ejection from the ejection head occurs.Type: ApplicationFiled: November 13, 2015Publication date: May 18, 2017Inventors: Sam NORASAK, Stephen T. OLSON, Ajay K. SUTHAR
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Publication number: 20170135921Abstract: A cosmetic ink set, method for printing and printer containing the ink set. The ink set includes at least two of a) a cyan ink that includes a cosmetically approved cyan dye; b) a magenta ink that includes a cosmetically approved magenta dye; and c) a yellow ink that includes a cosmetically approved yellow dye. Each of the cyan ink, magenta ink and yellow ink contains 1) a cosmetically approved humectant; 2) a cosmetically approved surfactant; and 3) water in an amount sufficient to provide 100 wt. % for each of the cyan, magenta and yellow inks based on a total weight of the ink.Type: ApplicationFiled: November 17, 2015Publication date: May 18, 2017Inventors: Keiichi EDAKA, Ajay K. SUTHAR
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Patent number: 9650525Abstract: An ink composition, a printer and a method for ejecting and aqueous fluid having a viscosity above about 1 Pa-sec at 25° C. from a fluid ejection head. The ink composition, printer and method include an aqueous fluid that contains an aqueous carrier component, solid particles ranging from about 8 wt. % to about 25 wt. % based on a total weight of the aqueous fluid, and a rheology modifier. A heater pulse signal applied to ejection heaters on a fluid ejection head for a period of time is sufficient to sputter fluid from fluid ejection nozzles associated with the ejection heaters and to shear the fluid thereby reducing the viscosity of the fluid from above about 1 Pa-sec to less than about 0.1 Pa-sec. A firing signal subsequently applied to the ejection heaters on the ejection head provides steady state fluid ejection from the ejection head.Type: GrantFiled: August 9, 2016Date of Patent: May 16, 2017Assignee: FUNAI ELECTRIC CO., LTD.Inventors: Ajay K. Suthar, Sam Norasak
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Publication number: 20160340528Abstract: An ink composition including at least one aqueous carrier, at least one color dye, and at least one polymeric dispersant selected such that the ink composition minimizes debris in a printhead.Type: ApplicationFiled: April 21, 2016Publication date: November 24, 2016Inventors: Ajay K. Suthar, Steve Olson, Sam Norasak
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Patent number: 9346967Abstract: An ink composition is disclosed that includes: at least one color dye in an amount between and including 1% by weight and 7% by weight; at least one polymeric dispersant in an amount between and including 0.1% by weight and 1% by weight; at least one organic solvent in an amount between and including 18% by weight and 22% by weight; at least one surfactant in an amount between and including 0.5% by weight and 1.5% by weight; at least one buffer in an amount between and including 0.1% by weight and 0.5% by weight; at least one biocide in an amount between and including 0.05% by weight and 0.2% by weight; and the balance being deionized water.Type: GrantFiled: May 22, 2015Date of Patent: May 24, 2016Assignee: Funai Electric Co., Ltd.Inventors: Ajay K. Suthar, Steve Olson, Sam Norasak
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Patent number: 6498202Abstract: Aqueous ink jet ink compositions comprise pigment, humectant, dispersant, and latex binder. The latex binder is formed from first monomer having a glass transition temperature Tg greater than about 70 C and comprising styrene, substituted styrene, methyl methacrylate, or a mixture thereof, second monomer having a glass transition temperature Tg less than about 0 C and comprising a C2-C10 alkyl acrylate, charge stabilizing agent, emulsifier and initiator. The latex binder has a glass transition temperature Tg of from about 0 C to about 70 C, an average particle size of from about 150 nm to about 350 nm, and a surface tension of from about 40 dynes/cm to about 60 dynes/cm.Type: GrantFiled: December 14, 1999Date of Patent: December 24, 2002Assignee: Lexmark International, IncInventors: Jing X. Sun, Ajay K. Suthar
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Patent number: 6309452Abstract: A wet rub resistant ink composition comprises, by weight, at least about 15% carrier medium, colorant in an amount of no more than about 20%, and at least about 2% polymeric capsules having central cavities containing water. The composition is substantially free of film-forming resins. The ink composition may be used in combination with other ink compositions having different colors or shades to increase the color gamut of an ink system.Type: GrantFiled: December 2, 1999Date of Patent: October 30, 2001Assignee: Lexmark International, Inc.Inventors: Bradley L. Beach, Ameeta B. Madhava, Anna M. Pearson, Ajay K. Suthar
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Patent number: 5457002Abstract: Trimers of C.sub.9 to C.sub.11 alpha olefins are useful as carrier fluid in liquid toner for electrophotography. Their use practically eliminates air pollution, oil slicks when liquid toned prints are placed on a surface and a halo effect.Type: GrantFiled: August 23, 1994Date of Patent: October 10, 1995Assignee: Lexmark International, Inc.Inventors: Bradley L. Beach, Carla M. Butler, Donald L. Elbert, Terence E. Franey, Richard W. Holt, Ashok Murthy, Ajay K. Suthar, Richard B. Watkins
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Patent number: 5432036Abstract: A liquid toner for electrostatic imaging having 65-90 percent by weight of solids of terpolymer of about in the weight ratio of about 60/33/7 of styrene, n-butyl acrylate and methacrylic acid, respectively; 10-30 percent by weight of solid of pigment, an ionic or zwitterionic charge director, 1-5 percent by weight aluminum tristearate, and the remainder mineral oil as a vehicle.Type: GrantFiled: April 25, 1994Date of Patent: July 11, 1995Assignee: Lexmark International, Inc.Inventors: Bradley L. Beach, Donald L. Elbert, Richard W. Holt, Ashok Murthy, Ajay K. Suthar, Richard B. Watkins
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Patent number: 5308729Abstract: A liquid toner having a mineral oil vehicle, a blend of Surlyn ionomeric resin and Nucrel resin, pigment and, as charge director, lecithin, N-methyl-2-pyrrolidone and calcium Petronate. The charge director optimizes speed of recovery of charge properties during continual use. The mineral oil does not vaporize well and is readily condensed, thus permitting use as a confined toner.Type: GrantFiled: April 30, 1992Date of Patent: May 3, 1994Assignee: Lexmark International, Inc.Inventors: Bradley L. Beach, Carla M. Butler, Terence E. Franey, Ashok Murthy, Pramod K. Sharma, Ajay K. Suthar
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Patent number: 5085171Abstract: A doctor blade (1) has an outer metal surface (15) on a grit layer with flexible backing. The blade is pushed by foam (21) or, alternately by inherent resilience, onto a developer roller (7). The compliance reduces toner variations which result from surface variations of the blade and the roller.Type: GrantFiled: June 10, 1991Date of Patent: February 4, 1992Assignee: Lexmark International, Inc.Inventors: Larry O. Aulick, Donald W. Stafford, Ajay K. Suthar