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).

  • Patent number: 5534290
    Abstract: 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: Grant
    Filed: March 7, 1994
    Date of Patent: July 9, 1996
    Assignee: Visatech Corporation
    Inventors: Jewel G. Rainwater, Paul Benson, William R. Belko, Robert J. Deffeyes, Arne B. Carlson, deceased
  • Patent number: 4937995
    Abstract: 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: Grant
    Filed: June 16, 1988
    Date of Patent: July 3, 1990
    Assignee: Carlisle Corporation
    Inventors: Robert J. Deffeyes, William A. Manly
  • Patent number: 4937041
    Abstract: 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: Grant
    Filed: February 2, 1989
    Date of Patent: June 26, 1990
    Assignee: Carlisle Memory Products Group Incorporated
    Inventor: Robert J. Deffeyes
  • Patent number: 4605835
    Abstract: 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: Grant
    Filed: May 21, 1984
    Date of Patent: August 12, 1986
    Assignee: Graham Magnetics Incorporated
    Inventor: Robert J. Deffeyes
  • Patent number: 4463030
    Abstract: 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: Grant
    Filed: December 24, 1980
    Date of Patent: July 31, 1984
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Harris W. Armstrong
  • Patent number: 4333966
    Abstract: 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: Grant
    Filed: December 24, 1980
    Date of Patent: June 8, 1982
    Assignee: Graham Magnetics, Inc.
    Inventors: Robert J. Deffeyes, Harris W. Armstrong
  • Patent number: 4289534
    Abstract: 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: Grant
    Filed: July 30, 1979
    Date of Patent: September 15, 1981
    Assignee: Graham Magnetics, Inc.
    Inventors: Robert J. Deffeyes, Harris W. Armstrong
  • Patent number: 4281043
    Abstract: 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: Grant
    Filed: December 12, 1977
    Date of Patent: July 28, 1981
    Assignee: Graham Magnetics, Inc.
    Inventor: Robert J. Deffeyes
  • Patent number: 4268302
    Abstract: 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: Grant
    Filed: July 2, 1979
    Date of Patent: May 19, 1981
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Wesley R. Tyler
  • Patent number: 4251275
    Abstract: 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: Grant
    Filed: June 18, 1979
    Date of Patent: February 17, 1981
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Harris W. Armstrong
  • Patent number: 4237189
    Abstract: 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: Grant
    Filed: October 31, 1973
    Date of Patent: December 2, 1980
    Assignee: Robert J. Deffeyes
    Inventor: Robert J. Deffeyes
  • Patent number: 4218507
    Abstract: 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: Grant
    Filed: September 8, 1978
    Date of Patent: August 19, 1980
    Assignee: Graham Magnetics, Inc.
    Inventors: Robert J. Deffeyes, Grover L. Johnson
  • Patent number: 4186244
    Abstract: 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: Grant
    Filed: May 3, 1977
    Date of Patent: January 29, 1980
    Assignee: Graham Magnetics Inc.
    Inventors: Robert J. Deffeyes, Harris W. Armstrong
  • Patent number: 4170602
    Abstract: 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: Grant
    Filed: July 11, 1975
    Date of Patent: October 9, 1979
    Assignee: Graham Magnetics, Inc.
    Inventors: Robert J. Deffeyes, Wesley R. Tyler
  • Patent number: 4160284
    Abstract: 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: Grant
    Filed: July 27, 1977
    Date of Patent: July 3, 1979
    Assignee: Graham Magnetics, Inc.
    Inventors: Robert J. Deffeyes, Harris W. Armstrong
  • Patent number: 4146504
    Abstract: 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: Grant
    Filed: September 26, 1974
    Date of Patent: March 27, 1979
    Assignee: Graham Magnetics Inc.
    Inventor: Robert J. Deffeyes
  • Patent number: 4137361
    Abstract: 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: Grant
    Filed: March 30, 1977
    Date of Patent: January 30, 1979
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Grover L. Johnson
  • Patent number: 4092459
    Abstract: 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: Grant
    Filed: January 13, 1975
    Date of Patent: May 30, 1978
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Grover Lee Johnson
  • Patent number: 4061824
    Abstract: 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: Grant
    Filed: September 12, 1975
    Date of Patent: December 6, 1977
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Wesley R. Tyler
  • Patent number: 4054530
    Abstract: A magnetic tape based on a cobalt-nickel-iron powder having an extraordinary combination of chemical stability and magnetic properties.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: October 18, 1977
    Assignee: Graham Magnetics, Inc.
    Inventor: Robert J. Deffeyes