Patents by Inventor Richard J. Kuo
Richard J. Kuo 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: 7658980Abstract: A tamper-indicating printable sheet. A preferred embodiment of the invention provides a tamper-indicating printable sheet comprising a retroreflective layer comprising a plurality of microbeads partially embedded in an inkjet receptive beadbond layer; and a reflector layer between one of the microbeads and the inkjet receptive beadbond layer. The present invention provides a method of making a tamper-indicating printable sheet.Type: GrantFiled: August 3, 2005Date of Patent: February 9, 2010Assignee: 3M Innovative Properties CompanyInventors: Richard J. Kuo, Mathias Detjen, Brian W. Dunne, Paul E. Marecki, Tadesse G. Nigatu, Kenneth M. White
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Patent number: 7648744Abstract: A tamper-indicating printable sheet. A preferred embodiment of the invention provides a tamper-indicating printable sheet comprising a retroreflective layer comprising a plurality of microbeads partially embedded in an inkjet receptive beadbond layer; and a reflector layer between one of the microbeads and the inkjet receptive beadbond layer. The present invention provides a method of making a tamper-indicating printable sheet.Type: GrantFiled: August 6, 2004Date of Patent: January 19, 2010Assignee: 3M Innovative Properties CompanyInventors: Richard J. Kuo, Mathias Detjen
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Patent number: 6136890Abstract: Described are pigmented inks comprising a liquid medium, a pigment, and a polyurethane dispersant, the pigment being stabilized by the polyurethane dispersant, and the ink being suitable for use in an ink jet printer.Type: GrantFiled: February 17, 1998Date of Patent: October 24, 2000Assignee: 3M Innovative Properties CompanyInventors: James G. Carlson, Steven T. Hedrick, Richard J. Kuo, Jeffrey T. Anderson
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Patent number: 6022403Abstract: Pigmented inks are disclosed comprising an aqueous medium, a pigment, a dispersant, and a humectant. Inks are disclosed where the humectant is a sulfonated polyethylene oxide which provides long decap times and fast drying of the printed image. Inks are further disclosed where the dispersant is an alkyl(sulfophenoxy)benzenesulfonic acid or its salt. Such dispersants reduce the agglomeration of pigment particles and reduce or eliminate the deposition of foreign substances on heater elements during the jetting process. A variety of pigments, dispersants, humectants, and aqueous media can be used. Combinations of a sulfonated polyethylene oxide humectant and an alkyl(sulfophenoxy)benzenesulfonic acid (salt) dispersant provide inks with good stability, few kogation problems, long decap times and relatively fast drying times.Type: GrantFiled: March 6, 1998Date of Patent: February 8, 2000Assignee: 3M Innovative Properties CompanyInventor: Richard J. Kuo
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Patent number: 5951749Abstract: Water-based pigmented inks are disclosed. Such inks are formed from water-based dispersions of pigment particles having novel dispersants therein. The dispersions are formed from the reaction product of an amino acid compound with a nitrogen reactive compound with subsequent hydrolysis providing the capability of the dispersant to hydrophobically interact with the pigment particles. The resultinginks are well-suited for use in ink jet and other printing applications.Type: GrantFiled: November 13, 1998Date of Patent: September 14, 1999Assignee: 3M Innovative Properties CompanyInventors: Larry R. Krepski, Prabhakara S. Rao, Terrance P. Smith, Kenneth D. Wilson, Richard J. Kuo
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Patent number: 5938830Abstract: Pigmented inks are disclosed comprising an aqueous medium, a pigment, and a N-disubstituted sulfosuccinamate dispersant, preferably tetrasodium N-(1,2-dicarboxyethyl)-N-octadecyl sulfosuccinamate. Such dispersants reduce the agglomeration of pigment particles and reduce or eliminate the deposition of foreign substances on heater elements during the jetting process. A variety of pigments, dispersants, humectants, and aqueous media can be used. Such dispersants provide inks with good stability, few kogation problems, long decap times, and no color-to-color bleed, and relatively fast drying times.Type: GrantFiled: February 17, 1998Date of Patent: August 17, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Richard J. Kuo, Jennifer Jeannette
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Patent number: 5854308Abstract: Water-based pigmented ink formulations are disclosed including a water soluble or water dispersible silicone-containing polymer additive comprising a vinyl silicone polymer. The additive significantly reduces kogation, mudcracking, and banding in some or all of the pigmented ink formulations.Type: GrantFiled: February 29, 1996Date of Patent: December 29, 1998Assignee: Minnesota Mining And Manufacturing CompanyInventors: Richard J. Kuo, Smarajit Mitra, Charles E. Boyer, III, Daniel B. Pendergrass, Jr.
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Patent number: 5840106Abstract: Water-based pigmented inks are disclosed. Such inks are formed from water-based dispersions of pigment particles having novel dispersants therein. The dispersions are formed from the reaction product of an alkenyl azlactone with an N-substituted amino acid compound. Subsequent to the reaction, the reaction product is ring-opened using an amine and, optionally, hydrolyzed. The resulting inks are well-suited for use in ink jet and other printing applications.Type: GrantFiled: November 13, 1995Date of Patent: November 24, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Larry R. Krepski, Richard J. Kuo, Prabhakara S. Rao, Terrance P. Smith
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Patent number: 5725647Abstract: Pigmented inks are disclosed comprising an aqueous medium, a pigment, a dispersant, and a humectant. Inks are disclosed where the humectant is a sulfonated polyethylene oxide which provides long decap times and fast drying of the printed image. Inks are further disclosed where the dispersant is an alkyl(sulfophenoxy)benzenesulfonic acid or its salt. Such dispersants reduce the agglomeration of pigment particles and reduce or eliminate the deposition of foreign substances on heater elements during the jetting process. A variety of pigments, dispersants, humectants, and aqueous media can be used. Combinations of a sulfonated polyethylene oxide humectant and an alkyl(sulfophenoxy)benzenesulfonic acid (salt) dispersant provide inks with good stability, few kogation problems, long decap times and relatively fast drying times.Type: GrantFiled: November 27, 1996Date of Patent: March 10, 1998Assignee: Minnesota Mining And Manufacturing CompanyInventors: James G. Carlson, Richard J. Kuo
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Patent number: 5527655Abstract: Radiation-sensitive polymeric adducts of (1) a sulfonated polyester resin having a plurality of sulfonate groups, (2) a diazonium resin having a plurality of diazonium groups, and (3) a salt of quaternary ammonium or quaternary phosphonium. This invention also provides a radiation-sensitive article comprising a substrate bearing a coating containing a radiation-sensitive adduct.Type: GrantFiled: September 28, 1994Date of Patent: June 18, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventors: James A. Bonham, Leonard J. Stulc, Richard J. Kuo, Kimberly R. Kukla
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Patent number: 5275880Abstract: A layered microwave radiation absorber comprises an absorbing layer bound to one side of a conductive layer (such as a metallic plate or foil), and an adhesive layer bound on the other side of the conductive layer. The combination may be applied directly to the surface of any object, but especially to an existing conductive object coated with an nonconductive coating (such as paint) without removing the nonconductive coating from the surface. Several types of absorbing materials may be used, and other layers may be included. The absorber has superior resistance to delamination.Type: GrantFiled: May 17, 1989Date of Patent: January 4, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Charles E. Boyer, III, Richard J. Kuo, Stephen M. Logiudice
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Patent number: 5106437Abstract: A conformable electromagnetic radiation suppression cover comprising one or more absorbing material(s) and a sealant. The cover conforms to the shape of a reflecting structure due to forces internal to the absorbing material(s) when the cover is subjected to an agent external to the cover. The absorber comprises dissipative particles bound in a conformable polymeric binder. The sealant is positioned to seal the conformable cover to the reflecting structure, and provides environmental protection to the structure and preferably better adhesion between the cover and the structure. In a preferred embodiment, the volume of the cover is varied before shrinkage to produce a cover thickness in the direction of incident radiation, as measured after shrinkage, which produces a preselected resonant frequency for the cover. The cover may include a conductive surface, such as a metallic foil. Impedance matching materials are preferred but not required.Type: GrantFiled: February 24, 1989Date of Patent: April 21, 1992Assignee: Minnesota Mining and Manufacturing CompanyInventors: Felix P. Lau, Donald M. Yenni, Jr., Ronald W. Seemann, Richard J. Kuo
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Patent number: 5085931Abstract: An electromagnetic radiation absorber is formed by dispersing into a dielectric binder acicular magnetic metallic filaments with an average length of about 10 micron or less, diameters of 0.1 micron or more, and aspect (length/diameter) ratios between 10:1 and 50:1. Preferably the average length is about 5 micron, the aspect ratios are between 10:1 and 25:1, and the dielectric binder is polymeric. The volume fraction of the filaments may be lower than 35% of the total and still provide satisfactory absorption. An absorbing paint is formed by dissolving the absorber in a base liquid. The absorber or absorbing paint may be applied to a conductive surface, such as a metallic wire, plate or foil. Impedance matching materials are preferred but not required.Type: GrantFiled: July 3, 1990Date of Patent: February 4, 1992Assignee: Minnesota Mining and Manufacturing CompanyInventors: Charles E. Boyer, III, Eric J. Borchers, Richard J. Kuo, Charles D. Hoyle
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Patent number: 4693930Abstract: Flexible magnetic recording media such as videotapes based on ferromagnetic oxide particles can provide high carrier-to-noise ratios previously available only with metal powder tapes when the recording layer has a high loading (at least 74% by weight) of oxide particles which have a high surface area (at least 40 m.sup.2 /g) and includes free monobasic fatty acid comprising more than 1.5% by weight of the ferromagnetic oxide particles. The free fatty acid provides a coefficient of friction not exceeding 0.3. A preferred monobasic fatty acid is myristic acid. By incorporating into the binder a lubricant-adsorption inhibitor such as citric acid, a greater proportion of the fatty acid remains free.Type: GrantFiled: May 3, 1985Date of Patent: September 15, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventors: Richard J. Kuo, John W. Mackay, Rick L. Van Buren