Prabhat Kumar, Paul Aimone, Robert W Balliett, Anthony V Parise, Thomas M Ramlow, Henning Uhlenhut: Low oxygen refractory metal powder for powder metallurgy. H C Starck, Joseph C Gil, Diderico van Eyl, February 18, 2003: US06521173 (46 worldwide citation)

A method of making sheet bar and other precursors of formed products to be made by extensive working. The method includes providing a powder metal, preferably under 100 PPM oxygen content of non-spherical particles, compacting the powder into a coherent precursor form of at least 100 pounds, whereby ...

Eric F Drake: Metal cutting tools utilizing gradient composites. Reed Rock Bit Company, Michael J Caddell, January 18, 1983: US04368788 (45 worldwide citation)

A rolling cutter drill bit is disclosed having cutters manufactured by powder metallurgy techniques, said cutters having gradient composite metallic structures in the cutting areas arranged to reduce or eliminate physical and metallic discontinuities and stress risers.

Moti Ochayon, Arie Falk: Cutting insert. ISCAR, Pennie & Edmonds, March 5, 1996: US05496137 (45 worldwide citation)

A cutting insert having a cutting head and a coupling shank integral at one end thereof with the cutting head and including a screw threaded portion. The cutting insert is formed by a powder metallurgy process of compacting and sintering and the screw threaded portion is constituted by a substantial ...

Darryl D Amick: Tungsten-containing firearm slug. Kolisch Hartwell P C, February 21, 2006: US07000547 (44 worldwide citation)

Firearm slugs formed from a non-toxic lead substitute that includes tungsten. In some embodiments, the firearm slug is formed with a recessed back portion, thus shifting an increased percentage of the slug's net mass toward the front of the slug. In some embodiments, the firearm slug is formed with ...

Thierry Caillat, Alexander Borshchevsky, Jean Pierre Fleurial: High performance p-type thermoelectric materials and methods of preparation. California Institute of Technology, Fish & Richardson P C, September 13, 2005: US06942728 (43 worldwide citation)

The present invention is embodied in high performance p-type thermoelectric materials having enhanced thermoelectric properties and the methods of preparing such materials. In one aspect of the invention, p-type semiconductors of formula Zn4−xAxSb3−yBy wherein 0≦x≦4, A is a transition metal, B is a ...

Jean Claude Nicolas, Raymond Saulnier: Process for direct shaping and optimization of the mechanical characteristics of penetrating projectiles of high-density tungsten alloy. Cime Bocuze, Oblon Spivak McClelland Maier & Neustadt, December 3, 1991: US05069869 (43 worldwide citation)

A process for shaping penetrating projectiles useful in the manufacture of military ammunition, comprising: preparing an alloy of tungsten, nickel, iron and copper by powder metallurgy, compacting the alloy mass into a rough shaped blank having an axis of revolution, sintering the rough shaped blank ...

Mark Clench: Matrix diamond drag bit with PCD cylindrical cutters. Smith International, Robert G Upton, October 15, 1991: US05056382 (41 worldwide citation)

A drag bit mold fabricated from high temperature resisting material is machined to accept cylindrically shaped polycrystalline diamond cutters (PCD) having tungsten carbide bodies. Each of the multiple PCD matrix pockets in the mold is formed by two independent non-parallel end mill passes. The firs ...

Eric F Drake, Harold A Sreshta: Rock bit hardmetal overlay and proces of manufacture. Camco International, Jeffery E Daly, April 4, 2000: US06045750 (40 worldwide citation)

Methods of forming a new wear and abrasion overlay formed with the steel surfaces of components for earth boring bits, and the components formed by the methods are disclosed. The overlay comprises a hard material particulate containing a metal carbide and an alloy steel matrix. The volume fraction o ...

Guy B Alexander, Ravindra M Nadkarni: Method for electroless plating of ultrafine or colloidal particles and products produced thereby. Leach & Garner, George W Dishong, July 31, 1990: US04944985 (40 worldwide citation)

The present invention provides a process for the electroless plating of easily reducible metals onto ultrafine, usually inert, particles. Such plating is achieved through careful and accurate control of such parameters as the feed rates of the various solutions, the control of pH of the solution, th ...

Holger J Koenigsmann, Paul S Gilman: Textured-grain-powder metallurgy tantalum sputter target. Praxair S T Technology, Iurie A Schwartz, August 3, 2004: US06770154 (40 worldwide citation)

The sputter target includes a tantalum body having tantalum grains formed from consolidating tantalum powder and a sputter face. The sputter face has an atom transport direction for transporting tantalum atoms away from the sputter face for coating a substrate. The tantalum grains have at least a 40 ...