Patents by Inventor Martin B. Sherwin

Martin B. Sherwin 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: 6071850
    Abstract: A method for producing by electrophoretic deposition multi-layer, polyfunctional, catalyst members for use in catalytic converters having a plurality of suitably porous and adherent catalyst support coatings of substantially uniform thickness, a plurality of non-identical catalytic agents imbued therein/on, and a flexible metal substrate, are disclosed. Such process involves maintaining electrical interaction between a metal substrate previously coated with catalyst-catalyst support material, the power source, and the electrodes disposed in the electrophoretic deposition ("EPD") cell containing a slurry of a second catalyst support material and a second catalyst composition non-identical to that found in the first catalytically-active layer.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: June 6, 2000
    Assignee: Engelhard Corporation
    Inventors: Semyon D. Friedman, Martin B. Sherwin, Rasto Brezny, Poovatholil F. Francis
  • Patent number: 5795456
    Abstract: A method for producing by electrophoretic deposition multi-layer, polyfunctional, catalyst members for use in catalytic converters having a plurality of suitably porous and adherent catalyst support coatings of substantially uniform thickness, a plurality of non-identical catalytic agents imbued therein/on, and a flexible metal substrate, are disclosed. Such process involves maintaining electrical interaction between a metal substrate previously coated with catalyst-catalyst support material, the power source, and the electrodes disposed in the electrophoretic deposition ("EPD") cell containing a slurry of a second catalyst support material and a second catalyst composition non-identical to that found in the first catalytically-active layer.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: August 18, 1998
    Assignee: Engelhard Corporation
    Inventors: Semyon D. Friedman, Martin B. Sherwin, Rasto Brezny, Poovatholil F. Francis
  • Patent number: 5288907
    Abstract: Catalytic hydrogenation of nitroalkane to N-alkylhydroxylamine free base in the absence of transition metal ions, and omission of acid and the resultant free base is storage stable, permitting shipment and storage of 15% aqueous solution for use as oxygen scavenger in boiler feed water treatment.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: February 22, 1994
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Martin B. Sherwin, Puvin Pichaichanarong
  • Patent number: 5140812
    Abstract: There is provided an improved core for an electrically heatable catalytic converter, and an electrically heatable catalytic converter containing such core, said core characterized by having a plurality of subcircuits in which the heater strips of thin high temperature resistive metal alloy are in parallel and connected between an outer shell segment and a central structural member, and the plurality of such subcircuits is connected in series, whereby the resistance between the terminals of the electrically heatable catalytic converter is effectively raised.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: August 25, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Richard C. Cornelison, Martin B. Sherwin
  • Patent number: 5023371
    Abstract: A process for forming thioglycolic acid by contacting in a reaction zone at elevated pressure of at least 250 psig a mixture of monochloroacetic acid and dichloroacetic acid with a molar excess of an alkali metal hydrosulfide to form the alkali metal salt of thioglycolic acid, acidifying said salt and removing the free thioglycolic acid. A preferred process further requires separating any formed thiodiglycolic acid from the resultant liquid phase materials and recycling said acid to the reaction zone.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: June 11, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Mosum E. Tsui, Martin B. Sherwin
  • Patent number: 5008428
    Abstract: This invention relates to the production of aminoacetonitriles, and more specifically to an integrated process wherein a crude, unpurified reactor product stream from a hydrogen cyanide reactor together with a formaldehyde stream, optionally, a crude, unpurified reactor product stream from a formaldehyde process reactor are fed directly to a reactive absorber with an additional nitrogen source and scrubbed with a controlled pH aqueous solution to produce aminoacetonitriles in high yields. This process eliminates intermediate recovery and purification processes associated with conventional hydrogen cyanide and formaldehyde production processes by integrating the recovery and reaction processes into a reactive absorber.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: April 16, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Martin B. Sherwin, Jow-Lih Su
  • Patent number: 4895971
    Abstract: This invention relates to the production of iminodiacetonitrile, and more specifically to an integrated process wherein a crude, unpurified reactor gas stream from a hydrogen cyanide reactor and optionally, a crude, unpurified reactor gas stream from a formaldehyde process reactor are fed directly to a reactive absorber together with additional ammonia and acidified water to produce iminodiacetonitrile in high yields. This process provides improved economics for producing iminodiacetonitrile by eliminating costly intermediate recovery and purification processes associated with conventional hydrogen cyanide and formaldehyde production processes.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: January 23, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Jow-Lih Su, Martin B. Sherwin
  • Patent number: 4869889
    Abstract: A process for the production of hydrogen cyanide which comprises combining methanol ammoxidation with formamide decomposition in the same reactor, using a metal oxide catalyst. This process generally involves forming a gaseous reaction mixture comprising methanol, formamide, ammonia, oxygen and optionally formaldehyde. This reaction mixture is then passed over the metal oxide catalyst at a temperature in the range 200.degree. to 600.degree. and a pressure in the range 5 to 20 psig.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: September 26, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Martin B. Sherwin, Jow-Lih Su
  • Patent number: 4859591
    Abstract: A process is disclosed for catalyzing the transamination of an amino acid precursor to the corresponding L-amino acid by using aspartic acid as the amino donor and by adding certain multivalent metal ions, in the form of solid metal particles or pieces, to the system to catalyze the decomposition of oxalacetic acid, a by-product of the transamination.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: August 22, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: James F. Walter, Martin B. Sherwin
  • Patent number: 4721811
    Abstract: An improved process for selectively forming aliphatic polyamines from aliphatic polynitriles having 2 to 3 atoms between cyano groups by reacting aliphatic polynitrile, with hydrogen in the presence of a primary or secondary amine, through a fixed bed reactor while continuously contacting the reactants with granular Raney cobalt packed therein.
    Type: Grant
    Filed: August 26, 1985
    Date of Patent: January 26, 1988
    Assignee: W. R. Grace & Co.
    Inventors: Martin B. Sherwin, Shu-Chieh P. Wang, Stewart R. Montgomery
  • Patent number: 4560653
    Abstract: A process for preparing L-aspartic acid by contacting fumarate ion-containing solution with aspartase or aspartase-producing microorganisms, adding maleic acid to insolubilize or precipitate the L-aspartic acid, isomerizing maleic acid in the supernatant liquid to form fumaric acid and recycling the fumaric acid into contact with the enzyme or microorganisms.
    Type: Grant
    Filed: June 6, 1983
    Date of Patent: December 24, 1985
    Assignee: W. R. Grace & Co.
    Inventors: Martin B. Sherwin, John J. Blouin
  • Patent number: 4524226
    Abstract: A process for selectively forming nitro compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an aldehyde having from two to ten carbon atoms with nitrogen dioxide alone or in the presence of oxygen and/or water.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: June 18, 1985
    Assignee: W. R. Grace & Co.
    Inventors: Shu-Chieh P. Wang, Martin B. Sherwin
  • Patent number: 4517394
    Abstract: A process for selectively forming nitroalkanes and nitroaromatics by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an organic carboxylic acid having from two to ten carbon atoms with NO.sub.2 alone or in the presence of oxygen and/or water.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: May 14, 1985
    Assignee: W. R. Grace & Co.
    Inventors: Shu-Chieh P. Wang, Martin B. Sherwin
  • Patent number: 4517392
    Abstract: A process for selectively forming nitro compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an alcohol having from two to ten carbon atoms with nitrogen dioxide alone or in the presence of oxygen and/or water.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: May 14, 1985
    Assignee: W. R. Grace & Co.
    Inventors: Shu-Chieh P. Wang, Martin B. Sherwin
  • Patent number: 4517393
    Abstract: A process for selectively forming nitro compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, a ketone having from three to ten carbon atoms with nitrogen dioxide alone or in the presence of oxygen and/or water.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: May 14, 1985
    Assignee: W. R. Grace & Co.
    Inventors: Shu-Shieh P. Wang, Martin B. Sherwin
  • Patent number: 4476336
    Abstract: An improved process for forming nitroparaffins by gaseous phase nitration of hydrocarbons higher than methane. The improvement comprises carrying out the nitration in the presence of a small amount of at least one carboxylic acid, preferably acetic acid.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: October 9, 1984
    Assignee: W. R. Grace & Co.
    Inventor: Martin B. Sherwin
  • Patent number: 4469904
    Abstract: A process for selectively forming nitro compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an organic carboxylic acid having from two to ten carbon atoms with NO.sub.2 or HNO.sub.3 alone or in the presence of oxygen and/or water.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: September 4, 1984
    Assignee: W. R. Grace & Co.
    Inventors: Shu-Chieh P. Wang, Martin B. Sherwin
  • Patent number: 4458094
    Abstract: An improved process for forming nitroparaffins by gaseous phase nitration of hydrocarbons higher than methane. The improvement comprises carrying out the nitration in the presence of a small amount of oxygenated hydrocarbons selected from aldehydes, ketones, alcohols, ethers and mixtures thereof.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: July 3, 1984
    Assignee: W. R. Grace & Co.
    Inventor: Martin B. Sherwin
  • Patent number: 4404416
    Abstract: A process is provided for the skeletal isomerization of straight chain olefins to branched chain olefins wherein the olefin is contacted with an activated alumina catalyst which has a particle size of from about 0.5.times.10.sup.-3 cm to about 160.times.10.sup.-3 cm and at least 10% of the pore volume is attributable to pores having radii between about 100 and 10,000 Angstroms.
    Type: Grant
    Filed: July 24, 1981
    Date of Patent: September 13, 1983
    Assignee: Polysar International S.A.
    Inventors: John R. Adams, Abraham P. Gelbein, Robert Hansen, Jimmy Y. Peress, Martin B. Sherwin
  • Patent number: 4404417
    Abstract: A process is provided for the skeletal isomerization of straight chain olefins to branched chain olefins by contact at an elevated temperature with a chlorine- or fluorine-containing compound activated alumina catalyst, the alumina having an average particle size of from about 0.5.times.10.sup.-3 cm to about 160.times.10.sup.-3 cm and from 3 to 9% of the pore volume being attributable to pores having radii from about 100 to about 10,000 Angstroms.
    Type: Grant
    Filed: July 24, 1981
    Date of Patent: September 13, 1983
    Assignee: Polysar International S.A.
    Inventors: John R. Adams, Abraham P. Gelbein, Robert Hansen, Jimmy Y. Peress, Martin B. Sherwin