Patents Represented by Attorney J. Schuman
  • Patent number: 4533414
    Abstract: A nickel-base alloy containing principally chromium molybdenum and tungsten is disclosed. The alloy is especially resistant to corrosion in a variety of corrosive media including oxidizing acids and reducing acids; furthermore, the alloy is not subject to localized corrosive attack, known as the "pitting" test. The alloy nominally contains 22% chromium, 13% molybdenum, 3% tungsten, 3% iron and the balance nickel plus small amounts of adventitious elements and impurities. Molybdenum and tungsten must be present in a ratio of about 4 to 1 respectively for optimum benefits of the invention.
    Type: Grant
    Filed: July 10, 1980
    Date of Patent: August 6, 1985
    Assignee: Cabot Corporation
    Inventor: Aziz I. Asphahani
  • Patent number: 4526749
    Abstract: Disclosed is a novel refractory metal alloy that retains the essential characteristics of pure tantalum and, additionally, has improved engineering characteristics and may be produced at a lower cost than pure tantalum. The alloy nominally contains, by weight, about 58% tantalum, about 2.0% molybdenum, about 2.5% tungsten and about 37.5% columbium.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: July 2, 1985
    Assignee: Cabot Corporation
    Inventors: Louis E. Huber, Jr., Harry D. Schwartz
  • Patent number: 4461290
    Abstract: There is disclosed herein a hearing protector structure comprising a generally U-shaped spring headband and a pair of ear canal obturating elements articulatingly affixed to the end portions of the headband. The hearing protector of the invention is possessed of the characteristics of light weight and comfort combined with superior sound attenuation performance.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: July 24, 1984
    Assignee: Cabot Corporation
    Inventors: Ross Gardner, Jr., Robert N. Falco, John P. Stallings
  • Patent number: 4450007
    Abstract: An electroslag remelting process for manganese-base alloys. The process includes the steps of: partially immersing a consumable electrode of a manganese-base alloy in a layer of molten slag and passing current between the consumable electrode and a second electrode. The current is passed through the slag layer under conditions which gradually melt the consumable electrode so that drops of molten metal from the consumable electrode move downwardly through the slag layer and resolidify as an ingot thereunder. The slag is characterized by a fusion temperature of more than F. ( C.), and often more than F. ( C.), above the melting point of the consumable electrode. It is preferably comprised of Al.sub.2 O.sub.3, CaO and CaF.sub.2.
    Type: Grant
    Filed: December 13, 1982
    Date of Patent: May 22, 1984
    Assignee: Cabot Corporation
    Inventors: Robert B. Herchenroeder, Boyd A. Heath
  • Patent number: 4410489
    Abstract: Disclosed is a nickel-base alloy which provides excellent corrosion resistance to a variety of severe environments, especially hot phosphoric acid. The alloy preferably contains, in weight percent: about 30 chromium, about 4 molybdenum, about 2 tungsten, about 1 Cb/Ta, about 1.5 copper, about 14 iron and the balance nickel plus the impurities and modifying elements usually found in alloy of this class. The alloy is eminently suited for use as articles in chemical processing apparatus in the manufacture and/or containment of phosphoric acid and sulfuric acid.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: October 18, 1983
    Assignee: Cabot Corporation
    Inventors: Aziz I. Asphahani, William L. Silence, Paul E. Manning
  • Patent number: 4394185
    Abstract: A process for producing formed copper beryllium alloys. The process includes the steps of: preparing a copper beryllium melt; casting the melt; hot working the cast copper beryllium; solution annealing the copper beryllium; optionally cold working the solution annealed copper beryllium; forming the copper beryllium; and age hardening the formed copper beryllium; and the improvement comprising the step of preaging the solution annealed or solution annealed and cold worked copper beryllium, prior to forming, at a temperature of from to F. for a period of up to 180 seconds, the copper beryllium being at final gauge prior to preaging.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: July 19, 1983
    Assignee: Cabot Berylco, Inc.
    Inventors: Henry T. McClelland, Joseph B. Kuhn
  • Patent number: 4389462
    Abstract: A composite article having particular utility as a welding stud and a process for producing the article. The article is comprised of a pin and an enclosing member formed from a dissimilar material. The pin is comprised of a head and a shank. The pin is formed from a metal. The cross-section of the head is larger than that of the shank in a direction normal to the length of the pin. The enclosing member fits over and is adhered to the shank. The enclosing member is formed from material in powder form. It is placed upon the shank and sintered thereon. The enclosing member fits up against the head so that the article is substantially devoid of a gap therebetween. The absence of a gap is attributable to the shape of the shank. The cross-section of the shank is larger, in a direction normal to the length of the pin, adjacent the head than over other parts thereof.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: June 21, 1983
    Assignee: Cabot Corporation
    Inventors: Paul J. Walsh, Jeffrey A. Burkart
  • Patent number: 4292290
    Abstract: There is disclosed an improved process and apparatus for the production of finely-divided metal and metalloid oxides by flame hydrolysis of corresponding metal and metalloid halides whereby fouling of burner apparatus is substantially completely avoided.
    Type: Grant
    Filed: April 16, 1980
    Date of Patent: September 29, 1981
    Assignee: Cabot Corporation
    Inventor: Donald E. Tunison, III
  • Patent number: 4278644
    Abstract: Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt, nickel, iron, and copper. The scrap is calcined with sodium carbonate in air to convert the refractory metal values to MoO.sub.4.sup..dbd., VO.sub.4.sup..tbd., WO.sub.4.sup..dbd., and CrO.sub.4.sup..dbd. and the base metals to water insoluble oxides. A leach of the calcined materials produces a pregnant liquor rich in refractory metals which, after separation of the vanadium, molybdenum and tungsten values, is treated with CO, CHOO.sup.-, CH.sub.3 OH, or HCHO to reduce Cr.sup.+6 to Cr.sup.+3. The carbonate and bicarbonate salts produced as a byproduct of the reduction are recycled to the calcination stage.As a result of the V, W, and Mo partition, a mixed solid comprising CaO.nV.sub.2 O.sub.5, CaMoO.sub.4, and CaWO.sub.4 is produced.
    Type: Grant
    Filed: April 15, 1980
    Date of Patent: July 14, 1981
    Assignee: Cabot Corporation
    Inventors: Alkis S. Rappas, Jameel Menashi, Donald A. Douglas
  • Patent number: 4273566
    Abstract: Relatively high pressure mixtures consisting essentially of a major ethane component and a minor, but substantial, propane component are separated into relatively pure ethane and propane fractions by subjecting such mixtures to a number of specific cooling steps and an expansion step preparatory to and in combination with a fractional distillation step. The overhead ethane fraction of the method has a propane content of no greater than about 10 mole percent and is provided in the gas phase. The propane bottom fraction of the method is provided in the liquid phase.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: June 16, 1981
    Assignee: Cabot Corporation
    Inventor: Brian L. Schwarz
  • Patent number: 3964093
    Abstract: Device leads are compliantly bonded and external leads are directly bonded to a substrate with a single stroke of a bonding tool. The external leads are comprised in a lead frame that includes a compliant medium portion for bonding the device leads.
    Type: Grant
    Filed: July 15, 1974
    Date of Patent: June 15, 1976
    Assignee: Western Electric Company, Inc.
    Inventor: Alexander Coucoulas