Patents by Inventor Anil V. Nadkarni

Anil V. Nadkarni 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: 6838021
    Abstract: The present invention provides water atomized copper powder comprising substantially irregular shaped copper particles having at least a median D50 particle size of from about 10 ?m to about 50 ?m. The powders of the present invention are suitable for use in electrically conductive compositions, such as copper-based adhesives. The present invention also provides methods of making these copper powders.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: January 4, 2005
    Assignee: SCM Metal Products, Inc.
    Inventors: Rajesh Khatter, Anil V. Nadkarni, Hsiao L. Cheng
  • Patent number: 6536352
    Abstract: Improved frangible bullets comprising powder particles of one metal bonded together by another metal wherein the metals have substantially different melting points or an alloying metal is diffused between the metal particles are manufactured by compacting the metal particles and heating under conditions to create brittle bonds.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: March 25, 2003
    Assignee: Delta Frangible Ammunition, LLC
    Inventors: Anil V. Nadkarni, John T. Abrams
  • Patent number: 6074454
    Abstract: The invention relates to bullets having increased frangibility (or which can be easily fragmented) and to materials and processes for the manufacture of such bullets. The bullets of the present invention are typically made from copper or copper alloy powders (including brass, bronze and dispersion strengthened copper) which are pressed and then sintered under conditions so as to obtain bullets with the desired level of frangibility. In preferred embodiments of the invention, the bullets also contain several additives that increase or decrease their frangibility.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: June 13, 2000
    Assignee: Delta Frangible Ammunition, LLC
    Inventors: John T. Abrams, Anil V. Nadkarni, Roy Kelly
  • Patent number: 6039785
    Abstract: The invention concerns a material for the powder-metallurgical production from a powder mixture containing at least approximately 50 wt. % copper in particular of valve seat rings or valve guides with high resistance to wear and corrosion and high heat conductivity. The starting powder mixture consists of between 50 and 90 wt. % of a basic powder, containing the copper portion, and between 10 and 50 wt. % of a powdery molybdenum-containing alloy flux. The basic powder is a copper powder which is dispersion-hardened by Al.sub.2 O.sub.3, has an Al.sub.2 O.sub.3 content of between 0.1 and 1.1 wt. %, and is produced by pulverizing a Cu--Al melt followed by heating in an oxidizing atmosphere. The invention further concerns the use of a dispersion-hardened powder of this type for the powder-metallurgical production in particular of wear and corrosion-resistant valve seat rings or valve guides with high heat conductivity. Finally, the invention concerns a method of producing such valve seat rings or valve guides.
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: March 21, 2000
    Assignees: Bleistahl Produktions-GmbH & Co. KG, SCM Metal Products, Inc.
    Inventors: Kirit Dalal, Ekkehard Kohler, Anil V. Nadkarni
  • Patent number: 5624475
    Abstract: A composite material comprising a pure copper or dispersion strengthened copper matrix and a boron rich species, such as, but not limited to, elemental boron or boron carbide, for use in the fabrication of baskets that support spent nuclear fuel in nuclear waste containers. A method for manufacturing the composite material using powder metallurgy and hot extrusion.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: April 29, 1997
    Assignee: SCM Metal Products, Inc.
    Inventors: Anil V. Nadkarni, Jack D. Troxell
  • Patent number: 5030275
    Abstract: This invention relates to substantially full-dense, near-net shape bodies made of dispersion strengthened copper (D.S.C.) powder and products which are cold formed and/or machined from these bodies, such as resistance welding electrodes. The invention includes processes for manufacturing substantially full-dense, near-net shape, substantially equiaxed bodies from D.S.C. powder.
    Type: Grant
    Filed: June 20, 1989
    Date of Patent: July 9, 1991
    Assignee: SCM Metal Products, Inc.
    Inventors: Prasan K. Samal, Anil V. Nadkarni
  • Patent number: 4879091
    Abstract: This invention relates to substantially full-dense, near-net shape bodies made of dispersion strengthened copper (D.S.C.) powder and products which are cold formed and/or machined from these bodies, such as resistance welding electrodes. The invention includes processes for manufacturing substantially full-dense, near-net shape, substantially equiaxed bodies from D.S.C. powder.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: November 7, 1989
    Assignee: SCM Metal Products, Inc.
    Inventors: Prasan K. Samal, Anil V. Nadkarni
  • Patent number: 4752334
    Abstract: There is provided a substantially fully dense powdered metal composite comprising a highly conductive metal or metal alloy matrix having dispersed therein discrete microparticles of a refractory metal oxide and discrete macroparticles of an additive metal or metal alloy, such as a nickel/iron alloy. The respective components undergo minimal alloying because sintering is not utilized in forming the composite. These composites are characterized by high thermal or electrical conductivity and a desired property attributable to the composite forming additive metal or metal alloy. The composites are useful in forming lead frames for integrated circuit chips, electric lamp lead wires, and electrical contact members.
    Type: Grant
    Filed: December 13, 1983
    Date of Patent: June 21, 1988
    Assignee: SCM Metal Products Inc.
    Inventors: Anil V. Nadkarni, Prasanna K. Samal, James E. Synk
  • Patent number: 4588870
    Abstract: An improved resistance welding electrode cap adapted to being internally cooled with a flow of coolant has a main body portion with a nose root at one end and an electrical and coolant connection projecting from the other, the area of the root being substantially smaller than that of the direct projection of the main body portion, a pronounced nose projecting from the root. The whole nose is of dispersion-strengthened copper, as is at least the main body portion. Such cap provides astonishingly improved performance for resistance welding, even of galvanized steel, and particularly of double-sided, galvanized cold-rolled steel sheet.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: May 13, 1986
    Assignee: SCM Corporation
    Inventors: Anil V. Nadkarni, Prasanna K. Samal
  • Patent number: 4478787
    Abstract: A process and a product produced thereby, for forming rod or bar or tube stock or strip, comprising a sheath and a densified dispersion strengthened metal core. Powdered dispersion strengthened copper is put into a metal can and compressively reduced to size and density. The relationship between the tensile strength of the core when fully densified and the cold worked tensile strength of the can is important to the nature of the product.
    Type: Grant
    Filed: December 14, 1983
    Date of Patent: October 23, 1984
    Assignee: SCM Corporation
    Inventors: Anil V. Nadkarni, Prasanna K. Samal, James C. Wang, James E. Sunk
  • Patent number: 4462845
    Abstract: Substantially completely deoxidized, consolidated dispersion-strengthened copper stock of sizable cross section and particulates capable of being thus consolidated into such stock are shown. The stock exhibits ductility substantially greater than that of otherwise corresponding stock which contains about 100-500 ppm of available oxygen. Also shown is a staged powder deoxidation process using hydrogen or like reducing gas followed by the sequestration of remaining available oxygen with a minute proportion of diffusible, normally solid oxygen getter.
    Type: Grant
    Filed: February 17, 1982
    Date of Patent: July 31, 1984
    Assignee: SCM Corporation
    Inventors: Erhard Klar, Anil V. Nadkarni, Prasanna K. Samal
  • Patent number: 4440572
    Abstract: A process for making a novel alloy of a dispersion strengthened copper by blending dispersion strengthened copper powder and a powdered modifying metal, heat treating the blend to form the alloy, and the compacting and working the compact to densify it.
    Type: Grant
    Filed: June 18, 1982
    Date of Patent: April 3, 1984
    Assignee: SCM Corporation
    Inventors: Anil V. Nadkarni, Prasanna K. Samal
  • Patent number: 4315770
    Abstract: A process for dispersion strengthening of atomized alloy particles by internal oxidation is substantially improved by providing atomized particles substantially free of oxide surface film to enhance the efficiency of the internal oxidation step. The atomized alloy particles can be produced by dry collection to prevent oxide film formation, or alternatively, the oxide surface film can be removed by mechanical action removal or by chemical leaching.
    Type: Grant
    Filed: May 2, 1980
    Date of Patent: February 16, 1982
    Assignee: SCM Corporation
    Inventor: Anil V. Nadkarni
  • Patent number: 4315777
    Abstract: This invention relates to dispersion strengthening of metals. A coherent mass comprising an intimate blend of alloy powder and oxidant is formed prior to dispersion strengthening. Said coherent mass is easily formed because the alloy powder is not yet strengthened, and undergoes internal oxidation rapidly because of the intimate blend of alloy powder and oxidant.
    Type: Grant
    Filed: August 7, 1979
    Date of Patent: February 16, 1982
    Assignee: SCM Corporation
    Inventors: Anil V. Nadkarni, Warren J. Haws, Charles I. Whitman
  • Patent number: 4274873
    Abstract: A process for dispersion strengthening metal alloys comprising the steps of separating metal powder particles larger than about 180 microns, flattening the particles to provide flake particles having a thickness less than 180 microns, and then internally oxidizing the flake particles. The flaked particles can be combined and consolidated with atomized particles less than about 180 microns on a 20% to 80% and preferably 40% to 60% weight basis to provide improved dispersion strengthened metal products.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: June 23, 1981
    Assignee: SCM Corporation
    Inventor: Anil V. Nadkarni
  • Patent number: 4110130
    Abstract: Welding electrodes and welding wheels can be hot forged from powdered dispersion strengthened metal wherein the powder is pressed into a preform, heated, and then hot forged to form a full density workpiece to produce a desirable grain structure.
    Type: Grant
    Filed: September 29, 1976
    Date of Patent: August 29, 1978
    Assignee: SCM Corporation
    Inventor: Anil V. Nadkarni
  • Patent number: 4077816
    Abstract: A dispersion-strengthened metal wherein the improvement comprises recrystallizing alloy powder prior to internal oxidation to increase the grain size of the alloy to at least about ASTM (E-112) Grain Size No. 6 to reduce the grain boundary area in the alloy powder whereby the recrystallized alloy powder provides substantially improved structural properties in the dispersion-strengthened metal product.
    Type: Grant
    Filed: January 23, 1975
    Date of Patent: March 7, 1978
    Assignee: SCM Corporation
    Inventor: Anil V. Nadkarni
  • Patent number: 4045644
    Abstract: A welding electrode made of dispersion strengthened metal wherein the electrode tip is pressure formed or forged to reorientate and/or destroy the coaxial fiber structure and form a non-axial grain structure in the electrode tip portion. The electrode is produced in a method for pressure flowing a blank by applying axial pressure to pressure flow the blank transverse to the axially applied pressure whereby the overall strength of workpieces such as welding electrode rods is substantially increased.
    Type: Grant
    Filed: July 24, 1975
    Date of Patent: August 30, 1977
    Assignee: SCM Corporation
    Inventors: William M. Shafer, Anil V. Nadkarni
  • Patent number: RE31902
    Abstract: A process for dispersion strengthing of atomized alloy particles by internal oxidation is substantially improved by providing atomized particles substantially free of oxide surface film to enhance the efficiency of the internal oxidation step. The atomized alloy particles can be produced by dry collection to prevent oxide film formation, or alternatively, the oxide surface film can be removed by mechanical action removal or by chemical leaching.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: May 28, 1985
    Assignee: SCM Corporation
    Inventor: Anil V. Nadkarni