Patents by Inventor Timothy W. Johnson
Timothy W. Johnson 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: 11978036Abstract: The present disclosure describes a directional radio frequency identification (RFID) system, which provides directional RFID tag scanning using RFID enclosures and moveable radio signal blocking components. The RFID systems herein also prevent unwanted RFID tag activation and focuses RFID readers on specific scan areas. The directional RFID systems may be implemented in any type of system that utilizes RFID tag reading, such as a point of sale systems and other related systems, which utilize RFID scanning.Type: GrantFiled: March 23, 2022Date of Patent: May 7, 2024Assignee: Toshiba Global Commerce Solutions Holdings CorporationInventors: Brad Matthew Johnson, David J. Steiner, Kimberly A. Wood, Timothy W. Crockett
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Patent number: 9334571Abstract: Methods for the formation of individual, precisely shaped nano- or micro-scale metallic structures, particularly pyramids. With this technique, mass fabrication of high-quality, uniform, and ultra-sharp pyramids, cones and wedges is achieved. The high yield, reproducibility, durability and massively parallel fabrication methods of this disclosure provide structures suitable for reliable optical sensing and detection and for cementing near-field optical imaging and spectroscopy as a routine characterization.Type: GrantFiled: March 13, 2013Date of Patent: May 10, 2016Assignee: Regents of the University of MinnesotaInventors: Sang-hyun Oh, Timothy W. Johnson
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Publication number: 20150203969Abstract: Methods for the formation of individual, precisely shaped nano- or micro-scale metallic structures, particularly pyramids. With this technique, mass fabrication of high-quality, uniform, and ultra-sharp pyramids, cones and wedges is achieved. The high yield, reproducibility, durability and massively parallel fabrication methods of this disclosure provide structures suitable for reliable optical sensing and detection and for cementing near-field optical imaging and spectroscopy as a routine characterization.Type: ApplicationFiled: March 13, 2013Publication date: July 23, 2015Inventors: Sang-hyun Oh, Timothy W. Johnson
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Patent number: 6037433Abstract: A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymer.Type: GrantFiled: November 13, 1998Date of Patent: March 14, 2000Assignee: Phillips Petroleum CompanyInventors: Joel L. Martin, Steven J. Secora, Elizabeth A. Benham, Max P. McDaniel, Eric Hsieh, Timothy W. Johnson
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Patent number: 6034186Abstract: A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymer.Type: GrantFiled: May 16, 1997Date of Patent: March 7, 2000Assignee: Phillips Petroleum CompanyInventors: Joel L. Martin, Steven J. Secora, Elizabeth A. Benham, Max P. McDaniel, Eric Hsieh, Timothy W. Johnson
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Patent number: 5286561Abstract: The present invention provides: (a) a method for producing a poly(arylene sulfide)(PAS) resin composition: (b) a PAS resin composition produced by the inventive resin composition production method; (c) a method which utilizes the inventive PAS resin composition in the production of a continuous fiber-reinforced composite; and (d) a PAS composite produced by the inventive composite production method. The PAS resin composition produced by the inventive resin composition production method comprises a crystallizable arylene sulfide polymer and a nucleating agent. The nucleating agent is admixed with the crystallizable arylene sulfide polymer by adding said nucleating agent to the polymerization reaction system. The inventive PAS resin composition solidifies to a fine-grained crystalline morphology and is well suited for use in the production of continuous fiber-reinforced composites, molded articles, and other products.Type: GrantFiled: January 14, 1993Date of Patent: February 15, 1994Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Lacey E. Scoggins
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Patent number: 5277983Abstract: A charge dissipating article having a poly(arylene sulfide) polymer surface with a semiconductive layer for static charge dissipation and/or induction shielding made by forming a laminate of a poly(arylene sulfide) substrate against a copper foil sheet at a temperature above the melting point of the PAS substrate, wherein the copper foil sheet has been treated with a silane selected from a specific group. When the laminate is cooled and the copper foil peeled away, a poly(arylene sulfide) substrate having a semiconductive surface coating is obtained.Type: GrantFiled: October 21, 1992Date of Patent: January 11, 1994Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Mark J. Dreiling
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Patent number: 5246538Abstract: Preparing an arylene sulfide polymer surface for improved bonding to another surface includes molding the initially smooth polymer surface to fit the contours of a metallic foil having a high topographical surface configuration so as to form a laminate; etching away the metallic foil from the laminate, and thereby imparting the desired high topographical configuration of the metallic foil onto the polymer surface, so as to improve adhesive bonding characteristics of the polymer surface.Type: GrantFiled: September 16, 1991Date of Patent: September 21, 1993Assignee: Phillips Petroleum CompanyInventor: Timothy W. Johnson
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Patent number: 5239002Abstract: In the adhesion of metallic materials to polymers, new adhesive agents of nitrogen containing hetrocyclic polymers such as compositions of imidazole-pyrridine, pyrrolidone-pyridine, and imidazole-pyrrolidone solutions have been discovered as useful. These agents also exhibit anti-corrosion effects. Adhesion and/or reduction of anti-corrosion can be accomplished by pre-coating the metal material with at least one of these agents prior to applying the polymer, or by preblending the polymer with at least one of these agents followed by applying the blend to the metal, under suitable conditions.Type: GrantFiled: August 16, 1990Date of Patent: August 24, 1993Assignee: Phillips Petroleum CompanyInventors: Iqbal Ahmed, Timothy W. Johnson, Henry L. Hsieh
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Patent number: 5211803Abstract: Poly(arylene sulfide) articles having plated metal paths thereon are disclosed. A pattern of areas of lesser crystallinity and areas of higher crystallinity is created in the polymer morphology of a surface of the article. The surface is then exposed to a chemical etchant selectively active upon the areas of lesser crystallinity thereby etching those areas of lesser crystallinity while leaving areas of higher crystallinity substantially unaffected. Then a conductive metal is deposited on the etched areas of lesser crystallinity by an electroless plating process. Subsequent electroplating can also be used.Type: GrantFiled: March 23, 1992Date of Patent: May 18, 1993Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Mark L. Stone
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Patent number: 5210128Abstract: The present invention provides: (a) a method for producing a poly(arylene sulfide)(PAS) resin composition: (b) a PAS resin composition produced by the inventive resin composition production method; (c) a method which utilizes the inventive PAS resin composition in the production of a continuous fiber-reinforced composite; and (d) a PAS composite produced by the inventive composite production method. The PAS resin composition produced by the inventive resin composition production method comprises a crystallizable arylene sulfide polymer and a nucleating agent. The nucleating agent is admixed with the crystallizable arylene sulfide polymer by adding said nucleating agent to the polymerization reaction system. The inventive PAS resin composition solidifies to a fine-grained crystalline morphology and is well suited for use in the production of continuous fiber-reinforced composites, molded articles, and other products.Type: GrantFiled: July 24, 1991Date of Patent: May 11, 1993Assignee: Phillips Petroleum CompanyInventor: Timothy W. Johnson
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Patent number: 5178707Abstract: A method for coating a poly(arylene sulfide) polymer surface with a semiconductive layer for static charge dissipation and/or induction shielding comprises laminating a poly(arylene sulfide) substrate against a copper foil sheet at a temperature above the melting point of the PAS substrate, wherein the copper foil sheet has been treated with a silane selected from a specific group. When the laminate is cooled and the copper foil peeled away, a poly(arylene sulfide) substrate having a semiconductive surface coating is obtained.Type: GrantFiled: August 30, 1991Date of Patent: January 12, 1993Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Mark J. Dreiling
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Patent number: 4921558Abstract: Poly(arylene sulfide)/long carbon fiber laminates containing small amounts of added crack inhibiting agent such as polyethylene have reduced levels of microcracking. The polyethylene can be introduced as a finely divided powder in a slurry prepreg process or can be compounded with the poly(arylene sulfide) and extruded as a film for stacking with carbon fabric.Type: GrantFiled: January 26, 1989Date of Patent: May 1, 1990Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Don G. Brady
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Patent number: 4916678Abstract: A capillary tube viscometer is provided in which the viscosity of a fluid can be measured at a temperature above the normal boiling point of at least one component in the fluid. The fluid is heated to the desired temperature in a sealed viscometer which is constructed so as to withstand high pressure. The fluid is then allowed to flow through a capillary tube and the time required for the fluid to flow through the capillary tube is measured. The viscosity of the fluid is then calculated based on the Hagen-Poiseuille law.Type: GrantFiled: April 7, 1988Date of Patent: April 10, 1990Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Marion T. O'Shaughnessy
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Patent number: 4750359Abstract: A capillary tube viscometer is provided in which the viscosity of a fluid can be measured at a temperature above the normal boiling point of at least one component in the fluid. The fluid is heated to the desired temperature in a sealed viscometer which is constructed so as to withstand high pressure. The fluid is then allowed to flow through a capillary tube and the time required for the fluid to flow through the capillary tube is measured. The viscosity of the fluid is then calculated based on the Hagen-Poiseuille law.Type: GrantFiled: August 24, 1981Date of Patent: June 14, 1988Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Marion T. O'Shaughnessy
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Patent number: 4690972Abstract: Compositions comprising a poly(arylene sulfide) which crystallizes to a fine-grained crystalline morphology are provided. A method is also provided for treating compositions comprising a poly(arylene sulfide) by incorporation of a crystalline morphology altering additive, heating the resulting mixture above the melting point of the poly(arylene sulfide) and cooling the mixture at a rate of less than 50.degree. C. per minute. Exemplary additives include a poly(arylene sulfide-ketone) and a polyaryl ketone.Type: GrantFiled: April 4, 1986Date of Patent: September 1, 1987Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, William H. Beever, James E. O'Connor, Jennings P. Blackwell
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Patent number: 4585700Abstract: A composition is provided containing a poly(arylene sulfide) and a hydrotalcite. The composition can further contain glass fibers and is suitable as a molding composition. The hydrotalcite-containing poly(arylene sulfide) provides a molding composition which offers the combination of mold corrosion inhibition, hydrolytic stability and insulation resistance compared with prior molding compositions. Also provided is an article of manufacture comprising a hydrotalcite-containing poly(arylene sulfide) molded part in contact with a liquid electrolyte. The use of hydrotalcite-containing resin reduces the effect of corrosive ionic species extractable from the poly(arylene sulfide) by the electrolyte. Such an article of manufacture would include, for example, a capacitor having a liquid electrolyte and a poly(arylene sulfide) cover.Type: GrantFiled: April 30, 1985Date of Patent: April 29, 1986Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Francis X. Mueller, Jr.
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Patent number: 4540620Abstract: A method is described for producing electrically-conductive paths in poly(arylene sulfide) and other polymers exhibiting differing receptivity to chemical doping agents depending upon the crystallinity of the polymer structure. Conductivity is selectively induced in amorphous regions by contacting the amorphous regions with a doping agent in solution. Selected areas of crystalline polymers are made amorphous by heat or solvent treatment.Type: GrantFiled: August 17, 1984Date of Patent: September 10, 1985Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Mark L. Stone
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Patent number: 4535116Abstract: A method for inhibiting formation of water trees in objects formed from compositions of polymers of ethylene used in dielectric applications having a density in a range above 0.92 g/cc as determined by ASTM D1505 by addition of an inhibiting amount of an aliphatic, primary, monohydric, branched chain alkanol of about 9 to about 30 carbon atoms. A composition inhibited in the formation of water trees in objects formed from compositions of polymers of ethylene used in dielectric applications having a density in a range above 0.92 g/cc and an inhibiting amount of an aliphatic, primary, monohydric, branched chain alkanol of about 9 to about 30 carbon atoms.Type: GrantFiled: September 26, 1983Date of Patent: August 13, 1985Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Dennis S. Banasiak
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Patent number: 4529769Abstract: A composition is provided containing a poly(arylene sulfide) and a hydrotalcite. The composition can further contain glass fibers and is suitable as a molding composition. The hydrotalcite-containing poly(arylene sulfide) provides a molding composition which offers the combination of mold corrosion inhibition, hydrolytic stability and insulation resistance compared with prior molding compositions. Also provided is an article of manufacture comprising a hydrotalcite-containing poly(arylene sulfide) molded part in contact with a liquid electrolyte. The use of hydrotalcite-containing resin reduces the effect of corrosive ionic species extractable from the poly(arylene sulfide) by the electrolyte. Such an article of manufacture would include, for example, a capacitor having a liquid electrolyte and a poly(arylene sulfide) cover.Type: GrantFiled: December 6, 1983Date of Patent: July 16, 1985Assignee: Phillips Petroleum CompanyInventors: Timothy W. Johnson, Francis X. Mueller, Jr.