Patents by Inventor Richard F. Davis
Richard F. Davis 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: 8153844Abstract: Disclosed is a method for preparing a compound of Formula 1 by contacting compound of Formula 2 with R1—NH2 in the presence of a carboxylic acid and a method for preparing a compound of Formula 2 by contacting a compound of Formula 4 with phosphorus tribromide. wherein R1 is H, C1-C4 alkyl, cyclopropyl, cyclopropylmethyl or methylcyclopropyl; R2 is CH3 or Cl; R3 is C1-C6 alkyl or C3-C6 alkenyl, each optionally substituted with up to 3 halogen and up to 1 phenyl; and X is Cl or Br. Also disclosed is a method for preparing a compound of Formula 5 wherein R4, R5, R6 and Z are as defined in the disclosure, using a compound of Formula 1 that is characterized by preparing the compound of Formula 1 by the method above.Type: GrantFiled: June 27, 2007Date of Patent: April 10, 2012Assignee: E. I. du Pont de Nemours and CompanyInventors: Richard F. Davis, Rafael Shapiro, Eric G. Taylor
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Publication number: 20090306372Abstract: Disclosed is a method for preparing a compound of Formula 1 by contacting compound of Formula 2 with R1—NH2 in the presence of a carboxylic acid and a method for preparing a compound of Formula 2 by contacting a compound of Formula 4 with phosphorus tribromide. wherein R1 is H, C1-C4 alkyl, cyclopropyl, cyclopropylmethyl or methylcyclopropyl; R2 is CH3 or Cl; R3 is C1-C6 alkyl or C3-C6 alkenyl, each optionally substituted with up to 3 halogen and up to 1 phenyl; and X is Cl or Br. Also disclosed is a method for preparing a compound of Formula 5 wherein R4, R5, R6 and Z are as defined in the disclosure, using a compound of Formula 1 that is characterized by preparing the compound of Formula 1 by the method above.Type: ApplicationFiled: June 27, 2007Publication date: December 10, 2009Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Richard F. Davis, Rafael Shapiro, Eric G. Taylor
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Patent number: 7107034Abstract: Methods and apparatus are provided for an interconnect system for coupling radio frequency signals from one component to another in a RF system. The interconnect system acts as a coaxial connection. The apparatus comprises an interconnect, a dielectric sleeve, and a conductive elastomeric gasket. The interconnect has a first major surface and second major surface for providing an electrical connection. A through hole is formed in a first component. The dielectric sleeve is placed in the through hole. The interconnect is placed in the dielectric sleeve. The conductive elastomeric gasket is placed in proximity to the through hole contacting the first component and a second component. The RF system is assembled compressing the elastomeric gasket to have intimate contact with the first and second component. The intimate contact electrically connects the first and second component and an electric shield is formed around the interconnect thereby suppressing the reception and transmission of RF signals.Type: GrantFiled: June 27, 2003Date of Patent: September 12, 2006Assignee: The Boeing CompanyInventor: Richard F. Davis
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Publication number: 20040266384Abstract: Methods and apparatus are provided for an interconnect system for coupling radio frequency signals from one component to another in a RF system. The interconnect system acts as a coaxial connection. The apparatus comprises an interconnect, a dielectric sleeve, and a conductive elastomeric gasket. The interconnect has a first major surface and second major surface for providing an electrical connection. A through hole is formed in a first component. The dielectric sleeve is placed in the through hole. The interconnect is placed in the dielectric sleeve. The conductive elastomeric gasket is placed in proximity to the through hole contacting the first component and a second component. The RF system is assembled compressing the elastomeric gasket to have intimate contact with the first and second component. The intimate contact electrically connects the first and second component and an electric shield is formed around the interconnect thereby suppressing the reception and transmission of RF signals.Type: ApplicationFiled: June 27, 2003Publication date: December 30, 2004Inventor: Richard F. Davis
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Patent number: 6686117Abstract: A radiographic silver halide film has reduced yellow dye stain by including a blend of tabular silver halide grains in the emulsion layers. The blend of grains includes blue-sensitive tabular silver halide grains that have an aspect ratio of at least 15, a grain thickness of at least 0.1 &mgr;m, and comprise at least 90 mol % bromide and up to 4 mol % iodide, based on total silver halide. Substantially all of the iodide is present in an internal localized portion of the tabular silver halide grains that excludes the surface of the grains. The blend also includes green-sensitive tabular silver halide grains that have an aspect ratio of at least 20, a grain thickness of at least 0.07 &mgr;m, and comprise at least 90 mol % bromide, up to 1.5 mol % chloride, and up to 1.5 mol % iodide, based on total silver halide. The molar ratio of silver in the blue-sensitive silver halide grains to the silver in the green-sensitive silver halide grains is from about 2:1 to about 6:1.Type: GrantFiled: March 26, 2003Date of Patent: February 3, 2004Assignee: Eastman Kodak CompanyInventors: Robert E. Dickerson, Richard F. Davis
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Patent number: 6686118Abstract: A blue-sensitive, radiographic silver halide film comprises a silver halide emulsion layer comprising predominantly tabular silver halide grains that have an aspect ratio of at least 15, a grain thickness of at least 0.1 &mgr;m, and comprise at least 90 mol % bromide and up to 4 mol % iodide, based on total silver halide. Substantially all of the iodide is present in an internal localized portion of the tabular silver halide grains that excludes the surface of the grains. The tabular silver halide grains are dispersed in a hydrophilic polymeric vehicle mixture comprising at least 0.5% of oxidized gelatin, based on the total dry weight of the polymeric vehicle mixture in the emulsion layer.Type: GrantFiled: March 26, 2003Date of Patent: February 3, 2004Assignee: Eastman Kodak CompanyInventors: Richard F. Davis, Robert E. Dickerson, Susan K. Mroczek
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Patent number: 6686115Abstract: A blue-sensitive, radiographic silver halide film comprises a silver halide emulsion layer comprising predominantly tabular silver halide grains that have an aspect ratio of at least 15, a grain thickness of at least 0.1 &mgr;M, and comprise at least 90 mol % bromide and from about 0.5 to about 2.75 mol % iodide, based on total silver halide. Substantially all of the iodide is present in an internal localized portion of the tabular silver halide grains that excludes the surface of the grains. The tabular silver halide grains are dispersed in a hydrophilic polymeric vehicle mixture comprising at least 0.5% of oxidized gelatin, based on the total dry weight of the polymeric vehicle mixture in the emulsion layer. In addition, the tabular grain emulsion includes a mercapto-substituted benzothiazole, benzoxazole, or benzimidazole to provide desired image tone and processability.Type: GrantFiled: March 26, 2003Date of Patent: February 3, 2004Assignee: Eastman Kodak CompanyInventors: Robert E. Dickerson, Richard F. Davis, Susan K. Mroczek
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Patent number: 6686116Abstract: A blue-sensitive radiographic silver halide film comprises a silver halide emulsion layer comprising predominantly tabular silver halide grains that have an aspect ratio of at least 15, a grain thickness of at least 0.1 &mgr;m, and comprise at least 90 mol % bromide and up to 4 mol % iodide, based on total silver halide. Substantially all of the iodide is present in an internal localized portion of the tabular silver halide grains that excludes the surface of the grains. The tabular silver halide grains are dispersed in a hydrophilic polymeric vehicle mixture comprising at least 0.5% of oxidized gelatin, based on the total dry weight of the polymeric vehicle mixture in the emulsion layer. The tabular silver halide grains are spectrally sensitized using a combination of spectral sensitizing dyes to provide increased speed and reduced dye stain.Type: GrantFiled: March 26, 2003Date of Patent: February 3, 2004Assignee: Eastman Kodak CompanyInventors: Robert E. Dickerson, Anthony Adin, Stephen A. Hershey, Richard F. Davis
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Patent number: 6682868Abstract: An imaging assembly includes a blue-sensitive, radiographic silver halide film comprises a silver halide emulsion layer comprising predominantly tabular silver halide grains that have an aspect ratio of at least 15, a grain thickness of at least 0.1 &mgr;m, and comprise at least 90 mol % bromide and up to 4 mol % iodide, based on total silver halide. The tabular silver halide grains are dispersed in a hydrophilic polymeric vehicle mixture comprising at least 0.5% of oxidized gelatin. The film is used in combination with one or more intensifying screens that absorb X-radiation and emit radiation having a wavelength of from about 300 to about 500 nm. In many embodiments, the intensifying screens include a “blue-light” emitting alkaline earth fluorohalide phosphor dispersed in a binder on a support.Type: GrantFiled: March 26, 2003Date of Patent: January 27, 2004Assignee: Eastman Kodak CompanyInventors: Robert E. Dickerson, Richard F. Davis, David J. Steklenski
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Patent number: 6625399Abstract: A method and device for detecting and/or photographing unregulated light flash events such as lighting strikes and muzzle flashes during both daylight and night time conditions is disclosed. The present device utilizes a photodiode sensor in conjunction with a photoresistor to control feedback gain of a transimpedance amplifier thereby providing non-linear amplification and therein constant sensitivity to detect an unregulated, omni-directional flash of light and produce an output signal that is input to an analog comparator circuit whereat a predetermined threshold level is set to prevent false triggering of the isolation relays and/or camera shutter. The output from the comparator circuit is input to a timer circuit to produce a signal of sufficient duration to trigger the isolation relay(s) and/or camera shutter.Type: GrantFiled: December 2, 2002Date of Patent: September 23, 2003Inventor: Richard F. Davis
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Patent number: 6243242Abstract: A method and device for detecting and photographing unregulated light flash events such as lighting strikes during both daylight and night time conditions is disclosed by detecting the initiation of the lightning stepped leader event of the immediate lightning flash for photographic and detecting activities. The present device utilizes a photodiode sensor in conjunction with a photoresistor to control feedback gain of a transimpedance amplifier to detect an unregulated, omni-directional flash of light and produces an output signal that is input to an analog comparator circuit where a predetermined threshold level is set to prevent false triggering of the isolation relay(s) and/or camera shutter. The output from the comparator circuit is input to a timer circuit to produce a signal of sufficient duration to trigger the isolation relay(s) and/or camera shutter.Type: GrantFiled: April 7, 2000Date of Patent: June 5, 2001Inventor: Richard F. Davis
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Patent number: 6132850Abstract: An adhesive and method for attaching a heat sink to a printing wiring assembly that provides a thermal path from electronic components on the printing wiring assembly to the heat sink. The adhesive is flexible and accommodates thermal expansion stresses and is readily reworkable. The adhesive comprises a filler material that is disposed between the heat sink and the printing wiring assembly, and an impregnant that impregnates the filler material, which impregnated filler material is cured. The filler material may comprise alumina particles that have a spherical shape. The impregnant comprises a polymer, typically selected from a group of epoxy resins and their curatives that form a flexible material when cured. In practicing the method, a heat sink is positioned adjacent to and spaced apart from a printing wiring assembly to provide an appropriate spacing between them. The periphery of the printing wiring assembly is sealed.Type: GrantFiled: November 25, 1996Date of Patent: October 17, 2000Assignee: Raytheon CompanyInventors: Ralph D. Hermansen, Richard F. Davis, E. Dean Johnston
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Patent number: 5859764Abstract: A thermally conductive wedgelock having improved thermal conductivity is used to secure a circuit card assembly in a card guide slot formed in a housing of an electronics package. The circuit card assembly has a thermal mounting plate that is used to secure the assembly in the slot. The thermally conductive wedgelock secures the circuit card assembly in the housing and conductively couples heat from the circuit card assembly to the housing by way of the card guide slot. The wedgelock provides a secondary heat path to the card guide slot to housing in addition to the primary heat path through the thermal mounting plate. Apparatus is provide for expanding the wedgelock in the card guide slot to secure the circuit card assembly therein. The thermally conductive wedgelock may be made of copper or other metal having high thermal conductivity. The wedgelock preferably comprises two tapered wedges, and has a guide that prevents rotation between the adjacent wedges.Type: GrantFiled: February 27, 1997Date of Patent: January 12, 1999Assignee: Raytheon CompanyInventors: Richard F. Davis, Lawrence S. Mills
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Patent number: 5550238Abstract: This invention relates to a process for preparing sulfonylureas comprising reacting a sulfonyl chloride with a cyanate salt and an amine base in the presence of an inert aprotic solvent to give an isocyanate complex which is then reacted with an amino heterocycle to form the sulfonylurea product and a process for converting the crystal form of the prepared sulfonylurea product to a more stable crystal product form.Type: GrantFiled: August 23, 1995Date of Patent: August 27, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventors: George C. Chiang, Richard F. Davis, Kwaku O. Temeng
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Patent number: 4636562Abstract: A process for the preparation of 2-chloro-6-haloquinoxaline compounds from the corresponding 4-halo-2-nitroaniline utilizing four reaction steps with generally compatible solvents and reagents with volatile by-products to minimize the isolation and purification of intermediates has been developed.Type: GrantFiled: November 1, 1984Date of Patent: January 13, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventor: Richard F. Davis
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Patent number: 4436690Abstract: A curved mandrel, method of making same, and method of curing an uncured polymeric hose employing such curved mandrel are provided and the curved mandrel comprises a plurality of members disposed in end-to-end relation to define the configuration of the mandrel including a predetermined curvature therein, interlocking portions for interlocking the members in only one position to define the configuration and curvature, and a readily attachable and detachable device for holding the members axially against each other after interlocking wherein the members with the interlocking portions and holding device are adapted to provide a substantially straight mandrel for installation of an uncured straight hose therearound, define the configuration and curvature in the mandrel and uncured hose, and provide looseness and axial spacing between members to enable easy withdrawal of the cured curved hose from around the members.Type: GrantFiled: October 28, 1981Date of Patent: March 13, 1984Assignee: Dayco CorporationInventor: Richard F. Davis
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Patent number: 4298330Abstract: A curved mandrel, method of making same, and method of curing an uncured polymeric hose employing such curved mandrel are provided and the curved mandrel comprises a plurality of members disposed in end-to-end relation to define the configuration of the mandrel including a predetermined curvature therein, interlocking portions for interlocking the members in only one position to define the configuration and curvature, and a readily attachable and detachable device for holding the members axially against each other after interlocking wherein the members with the interlocking portions and holding device are adapted to provide a substantially straight mandrel for installation of an uncured straight hose therearound, define the configuration and curvature in the mandrel and uncured hose, and provide looseness and axial spacing between members to enable easy withdrawal of the cured curved hose from around the members.Type: GrantFiled: October 22, 1979Date of Patent: November 3, 1981Assignee: Dayco CorporationInventor: Richard F. Davis
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Patent number: 4240192Abstract: A tool for and method of removing a die-cutting mat from a rotary anvil is provided wherein such anvil has a groove therein provided with an immobile locking wedge disposed centrally therewithin and the die-cutting mat has flanges at opposite end portions thereof which are snap locked in position utilizing the locking wedge.Type: GrantFiled: June 22, 1979Date of Patent: December 23, 1980Assignee: Dayco CorporationInventor: Richard F. Davis