21
Eric F Drake: Cutting teeth for rolling cutter drill bit. Reed Rock Bit Company, Michael J Caddell, February 8, 1983: US04372404 (40 worldwide citation)

Cutting teeth for rolling cutter bits, including cutter inserts, cutter teeth formed in place, or formed separately and welded in place, etc., are formed by powder metallurgy as a densified powder metallurgical composite of at least two varying phases, said composite having a substantially continuou ...


22
Eric F Drake, Harold A Sreshta: Rock bit hardmetal overlay and proces of manufacture. Camco International, Jeffery E Daly, April 4, 2000: US06045750 (39 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 ...


23
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 (39 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 ...


24
Moti Ochayon, Arie Falk: Cutting insert. ISCAR, Pennie & Edmonds, March 5, 1996: US05496137 (39 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 ...


25
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 (39 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 ...


26
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 (37 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 ...


27
Edward J Dulis, James N Fleck, Joseph W Powell: Method for producing aperture-containing powder-metallurgy article. Crucible, November 16, 1976: US03992202 (37 worldwide citation)

Method for producing a powder-metallurgy article having at least one aperture therein; the article is produced by providing a dense, nondeformable core having a configuration corresponding to the desired configuration of the aperture in said article; the core is placed in a particle charge having a ...


28
Earl L Frantz: Low expansion low resistivity composite powder metallurgy member and method of making the same. Carpenter Technology Corporation, Edgar N Jay, June 19, 1979: US04158719 (37 worldwide citation)

A compacted article having low thermal expansivity and high thermal conductivity is made by compacting a mixture of two metal powders, one of which has low thermal expansivity and the other of which has high thermal conductivity, and strip material made therefrom which is suitable for use in forming ...


29
Gregory J Del Corso, Robert E Carnes, David Esposito: Process and apparatus to simultaneously consolidate and reduce metal powders. Carpenter Technology Corporation, Edgar N Jay, Vincent T Pace, September 15, 1987: US04693863 (36 worldwide citation)

A powder metallurgy consolidation process and apparatus for carrying out said process produces integral metal bodies by heating metal powder of a predetermined composition to a temperature sufficient to cause solid state interparticle bonding, while simultaneously maintaining a reactive fluid in con ...


30
John D Barr: Rotary drill bits. NL Petroleum Products, Browning Bushman Zamecki & Anderson, February 14, 1989: US04804049 (36 worldwide citation)

The body of a rotary drill bit is formed from a matrix formed by a powder metallurgy process, and a plurality of cutting elements are mounted on the bit body, each cutting element being in the form of a disc of superhard material which is thermally stable at the temperature of formation of the matri ...



Click the thumbnails below to visualize the patent trend.