Patents by Inventor William A. Ferrando
William A. Ferrando 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: 5337803Abstract: The article is produced by prepositioning nonwoven reinforcement made of a etallic mesh to which ceramic tiles are wired inside of a centrifugal casting mold. Molten matrix metal is then introduced into the mold while being rotated about an axis parallel to the inflow path of the molten metal until it completely encapsulates the reinforcement.Type: GrantFiled: May 25, 1993Date of Patent: August 16, 1994Assignee: The United States of America as represented by the Secretary of the NavyInventors: Amarnath P. Divecha, Subhash D. Karmarkar, William A. Ferrando, Scott M. Hoover
-
Patent number: 5295528Abstract: A reinforcement made of a composite material is positioned inside of a ceifugal casting mold. Molten matrix metal is then introduced into the mold while being rotated about its longitudinal axis until the molten metal completely encapsulates the reinforcement.Type: GrantFiled: May 17, 1991Date of Patent: March 22, 1994Assignee: The United States of America as represented by the Secretary of the NavyInventors: Amarnath P. Diyecha, Subhash D. Karmarkar, William A. Ferrando, Scott M. Hoover
-
Patent number: 5283138Abstract: A light weight zinc electrode made of(1) a sintered mat of copper metal coated graphite fibers; and(2) a composite material of zinc active material and a hydrogel dispersed a solid, impervious, inert polymer matrix,wherein the composite material surrounds the individual copper metal coated graphite fibers of the sintered mat which support the composite material and provide paths of electrical conductivity throughout the composite material.Type: GrantFiled: July 27, 1993Date of Patent: February 1, 1994Assignee: The United States of America as represented by the Secretary of the NavyInventor: William A. Ferrando
-
Patent number: 5261151Abstract: A Nb-Ti or Nb-Zr low temperature superconducting (LTS) wire is coat with ten AgN0.sub.3 which is then decomposed to form a uniform silver metal (Ag) coating on the LTS wire. A uniform coating of molten Al or Al alloy is formed on the Ag coated LTS wire and then solidified. A bundle of the coated LTS wires is inserted into an Al or Al alloy tube and cold worked to form a multifilamentary LTS cable comprising the Ag coated LTS wires each surrounded by an Al or Al alloy matrix.Type: GrantFiled: July 17, 1992Date of Patent: November 16, 1993Assignee: The United States of America as represented by the Secretary of the NavyInventors: William A. Ferrando, Amarnath P. Divecha, James Kerr
-
Patent number: 5253797Abstract: A thin layer of silver metal is formed between a molybdenum surface and a eel surface. The silver metal layer is diffusion bonded to the molybdenum surface and diffusion bonded to the steel surface, thus bonding the molybdenum and steel surfaces together.Type: GrantFiled: July 21, 1992Date of Patent: October 19, 1993Assignee: The United States of America as represented by the Secretary of the NavyInventors: William A. Ferrando, Subhash D. Karmarkar, Scott M. Hoover, Amarnath P. Divecha
-
Patent number: 5214234Abstract: A composite reinforced gun barrel with a composite of a titanium, nickel, FeCrAlY alloy matrix reinforced with round filaments or rectangular ribbons made of molybdenum or tungsten. The composite layer may be bonded directly onto the barrel or it may be bonded to a steel jacket which can then be heat shrunk onto an existing gun barrel.Type: GrantFiled: July 17, 1992Date of Patent: May 25, 1993Assignee: The United States of America as represented by the Secretary of the NavyInventors: Amarnath P. Divecha, Subhash D. Karmarkar, Scott M. Hoover, William A. Ferrando
-
Patent number: 5205996Abstract: A reaction vessel comprising (1) a porous ceramic structure having intercecting, open pores and (2) silver metal coating the inner ceramic surfaces of the reaction vessel and filling the interconnecting, open pores to form a strong bond between the porous ceramic structure and the silver coating.The reaction vessel can be produced by(1) coating the inner surface and infiltrating the continuous, open pores of an unglazed porous ceramic structure (or vessel) with molten AgNO.sub.3 ;(2) decomposing the AgNO.sub.3 to silver metal; and then(3) repeating steps (1) and (2) until all the pores are filled with silver metal.Type: GrantFiled: February 19, 1992Date of Patent: April 27, 1993Assignee: The United States of America as represented by the Secretary of the NavyInventors: William Ferrando, Amarnath Divecha, James Kerr
-
Patent number: 5197993Abstract: A process for producing a lightweight electrode grid by exposing a heated t of dense graphite fibers to Ni(CO).sub.4 gas wherein the Ni(CO).sub.4 decomposes upon contact with the graphite fibers depositing nickel metal coating on the graphic fibers. The nickel coated graphite fibers are then sintered to form the grid. Nickel or cadmium electrodes are made by attaching a current collector to the grid and impregnating the grid with the appropriate nickel or cadmium active material.Type: GrantFiled: July 11, 1991Date of Patent: March 30, 1993Assignee: The United States of America as represented by the Secretary of the NavyInventors: William A. Ferrando, Amarnath P. Divecha
-
Patent number: 5193605Abstract: Process for the production of ingots of castable discontinuous metal matrix omposites by encapsulating particulate refractory material of the B.sub.4 C or SiC in a matrix metal of Li or al to form a solid master alloy, and introducing the master alloy into molten Mg or an alloy thereof, mixing and then cooling to solidify the resultant mixture and form an ingot with the refractory material substantially dispersed in the ingot.Type: GrantFiled: November 4, 1991Date of Patent: March 16, 1993Assignee: The United States of America as represented by the Secretary of the NavyInventors: Amarnath P. Divecha, Subhash D. Karmarkar, William A. Ferrando, Scott M. Hoover, James M. Kerr
-
Patent number: 5120575Abstract: A reaction vessel comprising (1) a porous ceramic structure having intercecting, open pores and (2) silver metal coating the inner ceramic surfaces of the reaction vessel and filling the interconnecting, open pores to form a strong bond between the porous ceramic structure and the silver coating.The reaction vessel can be produced by(1) coating the inner surface and infiltrating the continuous, open pores of an unglazed porous ceramic structure (or vessel) with molten AgNO.sub.3 ;(2) decomposing the AgNO.sub.3 to silver metal; and then(3) repeating steps (1) and (2) until all the pores are filled with silver metal.Type: GrantFiled: May 10, 1991Date of Patent: June 9, 1992Assignee: The United States of America as represented by the Secretary of the NavyInventors: William A. Ferrando, Amarnath P. Divecha, James Kerr
-
Patent number: 5100049Abstract: A method of bonding two carbon/carbon composite pieces or a carbon/carbon mposite piece and a graphite/aluminum metal matrix composite piece together by(1) forming a uniform coating of molten AgNO.sub.3 on the surfaces to be bonded at a temperature above the melting point of AgNO.sub.3 but below the decomposition temperature of AgNO.sub.3 ;(2) placing the molten AgNO.sub.3 coated surfaces to be bonded into contact with each other;(3) decomposing the molten AgNO.sub.3 to form a silver metal layer bonding the pieces together.If a graphite/aluminum metal matrix composite piece is being bonded, a silver diffusion step may be added at the end of the process to strengthen the silver bond to the metal cladding or metal matrix of the metal matrix composite piece.Type: GrantFiled: July 1, 1991Date of Patent: March 31, 1992Assignee: The United States of America as represented by the Secretary of the NavyInventors: Amarnath P. Divecha, William A. Ferrando, Philip W. Hesse, Subhash D. Karmarkan
-
Patent number: 5091362Abstract: A process for silver coating superconducting ceramic powder by(1) mixing AgNO.sub.3 with the superconducting ceramic powder particles;(2) melting the AgNO.sub.3 so that it wets and forms a uniform coating over he surfaces of the particles; and(3) decomposing the AgNO.sub.3 to form a thin, uniform coating of silver metal on the surfaces of the particles.The product is a loose powder of superconducting ceramic particles which are uniformly coated with silver metal. The powder can be cold worked (e.g., swaged, forged, etc.) to form superconducting structures such as rods or wires.Type: GrantFiled: October 10, 1990Date of Patent: February 25, 1992Assignee: The United States of America as represented by the Secretary of the NavyInventor: William A. Ferrando
-
Patent number: 5082826Abstract: A silver coated superconducting ceramic powder made by(1) coating the superconducting ceramic powder particles with AgNO.sub.3 ;(2) melting the AgNO.sub.3 so that it wets and forms a uniform coating over the surfaces of the particles; and(3) decomposing the AgNO.sub.3 to form a thin, uniform coating of silver metal on the surfaces of the particles.The product is a loose powder of superconducting ceramic particels which are uniformly coated with a thin layer of silver metal. The powder can be cold worked (e.g., swaged, forged, etc.) to form superconducting structures such as rods or wires.Type: GrantFiled: August 2, 1990Date of Patent: January 21, 1992Assignee: The United States of America as represented by the Secretary of the NavyInventor: William A. Ferrando
-
Patent number: 5051307Abstract: A process for producing high temperature, oxidation resistant silver metal oatings on carbon/carbon composite structures by coating the carbon/carbon surfaces with molten AgNO.sub.3 at a temperature above the melting point of AgNO.sub.3 but below the decomposition temperature of AgNO.sub.3, and then heating the resulting uniform coating of molten AgNO.sub.3 at a temperature of from the decomposition temperature of AgNO.sub.3 to about 700.degree. C. to decompose the molten AgNO.sub.3 and form a uniform coating of silver metal.Type: GrantFiled: July 3, 1990Date of Patent: September 24, 1991Assignee: The United States of America as represented by the Secretary of the NavyInventors: Amarnath P. Divecha, William A. Ferrando, Philip W. Hesse, Subhash D. Karmarkar
-
Patent number: 5045349Abstract: A method for producing lightweight silver-nickel composite electrodes by(1) infiltrating a graphite fiber plaque with a suspension of finely divi nickel powder in an aqueous solution of AgNO.sub.3 ;(2) drying the graphite fiber plaque to produce a coating of AgNO.sub.3 crystals and nickel particles on the surfaces of the graphite fibers;(3) heating the coated graphite fiber plaque at a temperature about the melting point of AgNO.sub.3 but below the decomposition temperature of AgNO.sub.3 until the AgNO.sub.3 melts and wets the nickel particles and the surfaces of the graphite fibers; and(4) heating the molten AgNO.sub.3 coated graphite fiber plaque at a temperature from the decomposition temperature of AgNO.sub.3 to about 600.degree. C. until the AgNO.sub.3 decomposes to form a thin uniform silver metal coating over the nickel particles and the surfaces of the graphite fibers.The silver-nickel particle coated graphite plaques is electrochemically treated to convert the silver to silver active material (Ag.Type: GrantFiled: August 16, 1989Date of Patent: September 3, 1991Assignee: The United States of America as represented by the Secretary of the NavyInventor: William Ferrando
-
Patent number: 4988673Abstract: A process for silver coating superconducting ceramic powder by(1) coating the superconducting ceramic powder particles with AgNO.sub.3 ;(2) melting the AgNO.sub.3 so that it wets and forms a uniform coating over the surfaces of the particles; and(3) decomposing the AgNO.sub.3 to form a thin, uniform coating of silver metal on the surfaces of the particles.The product is a loose powder of the superconducting ceramic particles which are uniformly coated with silver metal. The powder can be cold worked (e.g., swaged, forged, etc.) to form superconducting structures such as rods or wires.Type: GrantFiled: August 2, 1989Date of Patent: January 29, 1991Assignee: The United States of America as represented by the Secretary of the NavyInventor: William Ferrando
-
Patent number: 4978054Abstract: A method of forming diffusion bonds between aluminum and aluminum alloy saces by coating the surfaces with molten AgNO.sub.3 and then decomposing the AgNO.sub.3 to form a thin uniform layer of silver on the surfaces before forming the diffusion bond. The AgNO.sub.3 coating and decomposition in treatment permanently breaks up the Al.sub.2 O.sub.3 coatings on the aluminum or aluminum alloy surfaces, making diffusion bonding possible.Type: GrantFiled: July 3, 1990Date of Patent: December 18, 1990Assignee: The United States of America as represented by the Secretary of the NavyInventors: William A. Ferrando, Amarnath P. Divecha, Subhash D. Karmarkar
-
Patent number: 4965139Abstract: Corrosive-resistant, amorphous metal alloy coatings for crystalline metal surfaces wherein the coating is formed by vapor deposition of a mixture of(1) from 8 to 30 atomic percent of boron, silicon, or mixtures thereof and(2) the remainder being a modified metal composition formed by modifying the composition of the crystalline metal of the surface to produce a final amorphous metal alloy coating that is anodic in reference to the crystalline metal of the surface.Type: GrantFiled: March 1, 1990Date of Patent: October 23, 1990Assignee: The United States of America as represented by the Secretary of the NavyInventors: Lawrence T. Kabacoff, William Ferrando
-
Patent number: 4958763Abstract: An aluminum or aluminum alloy surface is coated with molten AgNO.sub.3, the ilver nitrate is decomposed (at about 450.degree. C.-550.degree. C.) leaving a thin layer of silver metal, and then an inter-diffusion layer of silver and aluminum is formed (at about 570.degree. C.-660.degree. C.). The treated surface can be soldered by conventional means.Type: GrantFiled: August 29, 1989Date of Patent: September 25, 1990Assignee: The United States of America as represented by the Secretary of the NavyInventors: Amarnath P. Divecha, William A. Ferrando, Philip W. Hesse, Subhash D. Karmarkar
-
Patent number: 4574096Abstract: A process for impregnating nickel or cadmium active material into a sinte nickel coated graphite fiber composite plaque electrode in which a suspension of 1-20 micron particles of active material in ethylene glycol in a 1:1 to 1:4 weight ratio of glycol to particles is gently worked into the plaque and the ethylene glycol is then evaporated off leaving the particles of active material distributed throughout the plaque. This procedure is repeated until the desired level of loading is achieved.Type: GrantFiled: May 29, 1985Date of Patent: March 4, 1986Assignee: The United States of America as represented by the Secretary of the NavyInventor: William Ferrando