Patents by Inventor Robert J. Deffeyes
Robert J. Deffeyes 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: 5534290Abstract: A multilayered ceramic chip capacitor. An electrode ink pattern is formed on a release film. The electrode ink pattern is calendered, densified and flattened. Dielectric material is applied to the release film and surrounds but does not cover the electrode ink to form an electrode surround printed dielectric sheet. The dielectric is calendered, densified and flattened. The densities of the electrode ink and dielectric are formulated such that after calendering the electrode ink and dielectric surfaces are substantially coplanar. A final overcoat of dielectric is applied over the surround printed dielectric sheet.Type: GrantFiled: March 7, 1994Date of Patent: July 9, 1996Assignee: Visatech CorporationInventors: Jewel G. Rainwater, Paul Benson, William R. Belko, Robert J. Deffeyes, Arne B. Carlson, deceased
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Patent number: 4937995Abstract: To indicate the origin of manufacture of the components of a roofing system, magnetically permeable particles are incorporated into the components. The particles are preferably loaded into the lap sealant and adhesive used to form field splices. Thus loaded, the lap sealant and/or adhesive has magnetically permeable properties or characteristics which are electromagnetically detectable through and beyond one layer of rubber sheeting. Detection of these particles provides an indication of origin of the material.Type: GrantFiled: June 16, 1988Date of Patent: July 3, 1990Assignee: Carlisle CorporationInventors: Robert J. Deffeyes, William A. Manly
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Patent number: 4937041Abstract: Metallization compositions utilizing a (1) relatively refractory flake product, e.g. flake-shaped powder of stainless steel, in combination with (2) a conductive metal such as silver which, upon being fired to melting, is held in the flake type matrix providing an excellent and inexpensive conductor. Termination compounds will comprise ceramic-adhesive frits. Body electrodes will usually comprise organic binders readily removable by thermal oxidation.Type: GrantFiled: February 2, 1989Date of Patent: June 26, 1990Assignee: Carlisle Memory Products Group IncorporatedInventor: Robert J. Deffeyes
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Patent number: 4605835Abstract: A process for attaching silver-bearing body electrodes of a multi-layer capacitor blank to a terminating material by using high-intensity heat source to fuse the terminal material to the capacitor blank and body electrode edges exposed on the surface of said blank. A particular advantage is avoidance of silver-migration from the body electrodes.Type: GrantFiled: May 21, 1984Date of Patent: August 12, 1986Assignee: Graham Magnetics IncorporatedInventor: Robert J. Deffeyes
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Patent number: 4463030Abstract: A novel silver powder paint composition characterized by a very low fusion, or film-forming temperature, probably assignable to the relatively small amount of oxides or other undesirable occulsions within coatings formed of the powder. The invention also relates to a new process for forming such a powder; the process is believed to involve the formation of a fatty-acid silver reaction product of the surface on the silver powder before it is subjected to fusion into a metallic coating. During fusion the decomposing reactant seems to act as a flux aiding the formation of a metal film of superior appearance and strength.Type: GrantFiled: December 24, 1980Date of Patent: July 31, 1984Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Harris W. Armstrong
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Patent number: 4333966Abstract: A novel silver powder composition characterized by a very low fusion, or film-forming temperature, probably assignable to the relatively small amount of oxides or other undesirable occlusions within coatings formed of the powder. The invention also relates to a new process for forming such a powder; the process is believed to involve the formation of a fatty-acid silver reaction product of the surface of the silver powder before it is subjected to fusion into a metallic coating. During fusion the decomposing reactant seems to act as a flux aiding the formation of a metal film of superior appearance and strength.Type: GrantFiled: December 24, 1980Date of Patent: June 8, 1982Assignee: Graham Magnetics, Inc.Inventors: Robert J. Deffeyes, Harris W. Armstrong
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Patent number: 4289534Abstract: A novel silver powder paint composition characterized by a very low fusion, or film-forming temperature, probably assignable to the relatively small amount of oxides or other undesirable occlusions within coatings formed of the powder. The invention also relates to a new process for forming such a powder; the process is believed to involve the formation of a fatty-acid silver reaction product of the surface of the silver powder before it is subjected to fusion into a metallic coating. During fusion the decomposing reactant seems to act as a flux aiding the formation of a metal film of superior appearance and strength.Type: GrantFiled: July 30, 1979Date of Patent: September 15, 1981Assignee: Graham Magnetics, Inc.Inventors: Robert J. Deffeyes, Harris W. Armstrong
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Patent number: 4281043Abstract: Polymodal magnetic information-recording articles formed with at least two different populations of magnetic powders, whereby at least one of the powders, being of lower intrinsic coercivity and forming means to accept a noise interference pattern, accepts a pattern which serves as a means to verify the authenticity of, or means to detect previous tampering with, the magnetic recording device. More generally, the disclosure relates to polymodal recording media characterized by incorporation of a plurality of independently-erasable ferromagnetic powder populations and processes for making and using said media. Particular advantage is disclosed for such media having a relatively small ratio of coercivity between easier and harder axis and for material wherein shape anisotropy is absent from adjacent modes in a polymodal system.Type: GrantFiled: December 12, 1977Date of Patent: July 28, 1981Assignee: Graham Magnetics, Inc.Inventor: Robert J. Deffeyes
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Patent number: 4268302Abstract: Improved processes and products based on the discovery that metal atoms in complex relationship with complexing agents can be used to moderate the formation of organic salt seed crystals which promote an exceptionally well-ordered acicular growth of organometallic salts such as oxalates of the metal. Some acicular, i.e., needle-like, products have particular utility for being reduced to ferromagnetic metal particles which retain a surprisingly large degree of acicularity and possess extraordinarily favorable properties for use in magnetic recording applications.Type: GrantFiled: July 2, 1979Date of Patent: May 19, 1981Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Wesley R. Tyler
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Patent number: 4251275Abstract: A silver paint having a maximum viscosity of 300 cps and containing particulate silver produced by thermal decomposition of a carboxylic acid salt of silver.Type: GrantFiled: June 18, 1979Date of Patent: February 17, 1981Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Harris W. Armstrong
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Patent number: 4237189Abstract: Polymodal magnetic information-recording articles formed with at least two different populations of magnetic powders, whereby at least one of the powders, being of lower intrinsic coercivity and forming means to accept a noise interference pattern, accepts a pattern which serves as a means to verify the authenticity or detect previous tampering with the magnetic recording device. More generally, the disclosure relates to polymodal recording media characterized by incorporation of a plurality of independently - erasable ferromagnetic powder populations and processes for making and using said media.Type: GrantFiled: October 31, 1973Date of Patent: December 2, 1980Assignee: Robert J. DeffeyesInventor: Robert J. Deffeyes
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Patent number: 4218507Abstract: Novel powders, and resinous compositions bearing said powders, characterized by excellent chemical stability, electrical conductivity, and energy-absorbing characteristics. These three characteristics can be utilized, alone or combination, in forming many novel articles including microwave shielding apparatus, magnetic recording media, explosives, and the like articles. The more advantageous powders are characterized by a very thin coating of an electrically conductive metal carbide, metal silicide, or metal boride upon the surface thereof, and a metal core.Type: GrantFiled: September 8, 1978Date of Patent: August 19, 1980Assignee: Graham Magnetics, Inc.Inventors: Robert J. Deffeyes, Grover L. Johnson
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Patent number: 4186244Abstract: A novel silver powder composition characterized by a very low fusion, or film-forming temperature, probably assignable to the relatively small amount of oxides or other undesirable occlusions within coatings formed of the powder. The invention also relates to a new process for forming such a powder; the process is believed to involve the formation of fatty-acid silver reaction product of the surface of the silver powder before it is subjected to fusion into a metallic coating. During fusion the decomposing reactant seems to act as a flux aiding the formation of a metal film of superior appearance and strength.Type: GrantFiled: May 3, 1977Date of Patent: January 29, 1980Assignee: Graham Magnetics Inc.Inventors: Robert J. Deffeyes, Harris W. Armstrong
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Patent number: 4170602Abstract: Improved processes and products based on the discovery that metal atoms in complex relationship with complexing agents can be used to moderate the formation of organic salt seed crystals which promote an exceptionally well-ordered acicular growth of organometallic salts such as oxalates of the metal. Some acicular, i.e. needle-like, products have particular utility for being reduced to ferromagnetic metal particles which retain a surprisingly large degree of acicularity and possess extraordinarily favorable properties for use in magnetic recording applications.Type: GrantFiled: July 11, 1975Date of Patent: October 9, 1979Assignee: Graham Magnetics, Inc.Inventors: Robert J. Deffeyes, Wesley R. Tyler
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Patent number: 4160284Abstract: An improved capacitor, especially of the tantalum capacitor type, wherein a very small particle silver metal powder is impregnated into a porous metal anode member, say of tantalum. The resulting capacitor has a much reduced resistance in the non-dielectric components of the capacitor without any substantial decrease in the desirably-high reistance across the dielectric component of the capacitor. The process of forming such a capacitor is relatively inexpensive and allows one to avoid a number of manufacturing steps and reduce the manufacturing cost of the improved capacitor even though it contains a relatively large amount of silver metal.Type: GrantFiled: July 27, 1977Date of Patent: July 3, 1979Assignee: Graham Magnetics, Inc.Inventors: Robert J. Deffeyes, Harris W. Armstrong
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Patent number: 4146504Abstract: Novel materials formed from powders of high porosity, usually characterized by high surface area and always with a very low bulk density, are disclosed. Metal-bearing powders of this type are found to be particularly useful as catalysts and in magnetic applications. Some such powders find use in reinforcement of resins. Also disclosed are novel procedures suitable for making such powders and novel processes and novel compositions in which these powders can be advantageously utilized.Type: GrantFiled: September 26, 1974Date of Patent: March 27, 1979Assignee: Graham Magnetics Inc.Inventor: Robert J. Deffeyes
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Patent number: 4137361Abstract: Novel powders, and resinous compositions bearing said powders, characterized by excellent chemical stability, electrical conductivity, and energy-absorbing characteristics. These three characteristics can be utilized, alone or combination, in forming many novel articles including microwave shielding apparatus, magnetic recording media, explosives, and the like articles. The more advantageous powders are characterized by a very thin coating of an electrically conductive metal carbide, metal silicide, or metal boride upon the surface thereof, and a metal core.Type: GrantFiled: March 30, 1977Date of Patent: January 30, 1979Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Grover L. Johnson
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Patent number: 4092459Abstract: Novel powders, and resinous compositions bearing said powders, characterized by excellent chemical stability, electrical conductivity, and energy-absorbing characteristics. These three characteristics can be utilized, alone or combination, in forming many novel articles including microwave shielding apparatus, magnetic recording media, explosives, and the like. The more advantageous powders are characterized by a very thin coating of an electrically conductive metal carbide, metal silicide, or metal boride upon the surface thereof, and a metal core.Type: GrantFiled: January 13, 1975Date of Patent: May 30, 1978Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Grover Lee Johnson
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Patent number: 4061824Abstract: Improved processes and products based on the discovery that metal atoms in complex relationship with complexing agents can be used to moderate the formation of organic salt seed crystals which promote an exceptionally well-ordered acicular growth of organometallic salts such as oxalates of the metal. Some acicular, i.e. needle-like, products have particular utility for being reduced to ferromagnetic metal particles which retain a surprisingly large degree of acicularity and possess extraordinarily favorable properties for use in magnetic recording applications.Type: GrantFiled: September 12, 1975Date of Patent: December 6, 1977Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Wesley R. Tyler
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Patent number: 4054530Abstract: A magnetic tape based on a cobalt-nickel-iron powder having an extraordinary combination of chemical stability and magnetic properties.Type: GrantFiled: June 14, 1976Date of Patent: October 18, 1977Assignee: Graham Magnetics, Inc.Inventor: Robert J. Deffeyes