Patents by Inventor John J. Felten
John J. Felten 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: 6821474Abstract: The invention allows the fabrication of small, dense beads of dielectric materials with selected compositions, which are incorporated into a polymeric matrix for use in capacitors, filters, and the like. A porous, generally spherical bead of hydrous metal oxide containing titanium or zirconium is made by a sol-gel process to form a substantially rigid bead having a generally fine crystallite size and correspondingly finely distributed internal porosity. The resulting gel bead may be washed and hydrothermally reacted with a soluble alkaline earth salt (typically Ba or Sr) at elevated temperature and pressure to convert the bead into a mixed hydrous titanium- or zirconium-alkaline earth oxide while retaining the generally spherical shape. Alternatively, the gel bead may be made by coprecipitation. This mixed oxide bead is then washed, dried and calcined to produce the desired (BaTiO3, PbTiO3, SrZrO3) structure. The sintered beads are incorporated into a selected polymer matrix.Type: GrantFiled: March 18, 2003Date of Patent: November 23, 2004Assignee: UT-Battelle, LLCInventors: Robert J. Lauf, Kimberly K. Anderson, Frederick C. Montgomery, Jack L. Collins, John J. Felten
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Publication number: 20040060730Abstract: The invention allows the fabrication of small, dense beads of dielectric materials with selected compositions, which are incorporated into a polymeric matrix for use in capacitors, filters, and the like. A porous, generally spherical bead of hydrous metal oxide containing titanium or zirconium is made by a sol-gel process to form a substantially rigid bead having a generally fine crystallite size and correspondingly finely distributed internal porosity. The resulting gel bead may be washed and hydrothermally reacted with a soluble alkaline earth salt (typically Ba or Sr) at elevated temperature and pressure to convert the bead into a mixed hydrous titanium- or zirconium-alkaline earth oxide while retaining the generally spherical shape. Alternatively, the gel bead may be made by coprecipitation. This mixed oxide bead is then washed, dried and calcined to produce the desired (BaTiO3, PbTiO3, SrZrO3) structure. The sintered beads are incorporated into a selected polymer matrix.Type: ApplicationFiled: March 18, 2003Publication date: April 1, 2004Inventors: Robert J. Lauf, Kimberly K. Anderson, Frederick C. Montgomery, Jack L. Collins, John J. Felten
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Patent number: 6600645Abstract: The invention allows the fabrication of small, dense beads of dielectric materials with selected compositions, which are incorporated into a polymeric matrix for use in capacitors, filters, and the like. A porous, generally spherical bead of hydrous metal oxide containing titanium or zirconium is made by a sol-gel process to form a substantially rigid bead having a generally fine crystallite size and correspondingly finely distributed internal porosity. The resulting gel bead may be washed and hydrothermally reacted with a soluble alkaline earth salt (typically Ba or Sr) at elevated temperature and pressure to convert the bead into a mixed hydrous titanium- or zirconium-alkaline earth oxide while retaining the generally spherical shape. Alternatively, the gel bead may be made by coprecipitation. This mixed oxide bead is then washed, dried and calcined to produce the desired (BaTiO3, PbTiO3, SrZrO3) structure. The sintered beads are incorporated into a selected polymer matrix.Type: GrantFiled: September 27, 2002Date of Patent: July 29, 2003Assignees: UT-Battelle, LLC, E. I. Dupont de Nemours and CompanyInventors: Robert J. Lauf, Kimberly K. Anderson, Frederick C. Montgomery, Jack L. Collins, John J. Felten
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Patent number: 6484539Abstract: The present invention provides a method for drawing fibers from materials which exhibit low viscosities at the equilibrium melting temperature. Further, the present invention provides novel drawn fibers from materials which were thought to be incompatible with a fiber-drawing process. The present invention also provides a means of minimizing recrystallization of molten materials during fiber drawing. Still further, the present invention provides novel drawn fibers with a greater tensile strength and greater concentrations of additives as compared to prior art fibers. Lastly, the present invention provides a means for producing crystalline fibers with controlled chemical compositions, and fibers with high tensile strengths as compared to prior art fibers of the same composition.Type: GrantFiled: July 8, 1998Date of Patent: November 26, 2002Assignee: Containerless Research, Inc.Inventors: Paul C. Nordine, J. K. Richard Weber, John J. Felten
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Patent number: 5338708Abstract: A thick composition comprising a mixture of: (a) 30-80% wt. finely divided particles of palladium powder having a surface area of 3-10 square meters/gm and density of 0.5-0.7 grams/cc; (b) 2-10% wt. finely divided particles of a refractory inorganic binder; all of A and B being dispersed in (c) 68-10% wt. of an organic medium; wherein the firing temperature of the composition is from 800.degree.-950.degree. C. This thick film composition is useful for forming detector electrodes within hydrogen sensors.Type: GrantFiled: December 20, 1993Date of Patent: August 16, 1994Assignee: E. I. du Pont de Nemours and CompanyInventor: John J. Felten
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Patent number: 5306756Abstract: Method for patterning organic polymer layers comprising the sequential steps:A. Applying to a substrate an unpatterned layer of acidic polymer dissolved in a plasticizer,B. Applying to the unpatterned layer a second patterned layer which is a liquid solution of organic base dissolved in a volatile solvent;C. Heating the patterned layer to effect removal of the volatile solvent from the layer and diffusion of the second layer plasticizer and organic base into the underlying areas of the acidic polymer layer; andD. Washing the layers with aqueous solution to effect solubilization of the acidic polymer underlying the patterned areas and removal therefrom of the solubilized polymer and plasticizers.Type: GrantFiled: November 18, 1992Date of Patent: April 26, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventors: John J. Felten, Sheau-Hwa Ma
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Patent number: 5275689Abstract: Method for patterning organic polymer layers comprising the sequential steps:A. Applying to a substrate an unpatterned layer of solid acid labile polymer;B. Applying to the unpatterned layer a patterned second layer comprising a liquid solution of organic acid and volatile solvent;C. Heating the patterned layer to effect removal of the volatile solvent from the layer and diffusion of the organic acid into the underlying areas of the first layer; andD. Washing the layers with aqueous base solution to remove the solubilized acid labile polymer from the patterned areas of the layers.Type: GrantFiled: November 14, 1991Date of Patent: January 4, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventors: John J. Felten, Walter R. Hertler, Sheau-Hwa Ma
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Patent number: 5209814Abstract: Method for patterning organic polymer layers comprising the sequential steps:A. Applying to a substrate an unpatterned layer of acidic polymer dissolved in a plasticizer,B. Applying to the unpatterned layer a second patterned layer which is a liquid solution of organic base dissolved in a volatile solvent;C. Heating the patterned layer to effect removal of the volatile solvent from the layer and diffusion of the second layer plasticizer and organic base into the underlying areas of the acidic polymer layer; andD. Washing the layers with aqueous solution to effect solubilization of the acidic polymer underlying the patterned areas and removal therefrom of the solubilized polymer and plasticizers.Type: GrantFiled: September 30, 1991Date of Patent: May 11, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventors: John J. Felten, Sheau-Hwa Ma
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Patent number: 5032216Abstract: A non-photographic method for making patterns in organic polymer films comprising the sequential steps:a. Applying to a substrate an unpatterned first layer comprising a solid organic polymer which is dispersible in a predetermined eluant;b. Applying to the unpatterned first layer a patterned second layer comprising an agent which is capable of changing the dispersibility of the solid organic polymer in the predetermined eluant;c. Effecting patterned diffusion of the dispersibility-changing agent into the underlying solid organic polymer layer; andd. Removing the areas of the underlying solid organic polymer which are dispersible in the eluant by washing them with the predetermined eluant.Type: GrantFiled: August 29, 1990Date of Patent: July 16, 1991Assignee: E. I. Du Pont de Nemours and CompanyInventor: John J. Felten
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Patent number: 4598037Abstract: A photosensitive conductive metal coating composition which is fireable in a weakly oxidizing atmosphere comprising an admixture ofa. Smooth finely divided particles of conductive metal, andb. Finely divided particles of cadmium-containing lead aluminosilicate glass, dispersed in a solution ofc. Acrylic polymer binderd. Volatile plasticizer,e. A photoinitiation system, andf. Photohardenable monomer.Type: GrantFiled: December 21, 1984Date of Patent: July 1, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventor: John J. Felten
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Patent number: 4414143Abstract: Palladium/silver metallizations having excellent solderability and aged adhesion are obtained by substituting for the palladium copper and/or certain transition metals or binary metal oxides and concommitantly reducing the amount of inorganic binder.Type: GrantFiled: May 6, 1981Date of Patent: November 8, 1983Assignee: E. I. Du Pont de Nemours & Co.Inventor: John J. Felten
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Patent number: 4235944Abstract: Process for producing superior thick film gold conductors useful in electronic microcircuits containing small amounts of silver in the compositions. Improved properties prior to heat aging include surface characteristics, malleability and electrical conductivity. Improved properties of thermally aged aluminum wire bonds include adhesion, electrical continuity and electrical conductivity.Type: GrantFiled: October 29, 1979Date of Patent: November 25, 1980Assignee: E. I. Du Pont de Nemours and CompanyInventor: John J. Felten
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Patent number: 4230493Abstract: Superior thick film gold conductor compositions useful in electronic microcircuits containing small amounts of silver. Improved properties prior to heat aging include surface characteristics, malleability and electrical conductivity. Improved properties of thermally aged aluminum wire bonds include adhesion, electrical continuity and electrical conductivity.Type: GrantFiled: September 22, 1978Date of Patent: October 28, 1980Assignee: E. I. Du Pont de Nemours and CompanyInventor: John J. Felten