Patents by Inventor Yuval Halpern

Yuval Halpern 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: 6583310
    Abstract: A non-catalytic process for producing esters, the process comprising reacting an ammonium salt of a carboxylic acid with an alcohol and removing ammonia from the reaction mixture. Selectivities for the desired ester product can exceed 95 percent.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: June 24, 2003
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Yuval Halpern
  • Patent number: 5290432
    Abstract: An improved method for detoxifying waste materials contaminated with halogenated aromatic hydrocarbons is disclosed. The method provides for detoxification of halogenated aromatic compounds by electrophilic aromatic substitution. The method also provides for the dehalogenation of the lower congeners of such halogenated aromatic compounds, as a result of chemical activation via electrophilic aromatic substitution, followed by nucleophilic aromatic dehalogenation. In addition, the method provides for the more complete dehalogenation of mixtures of halogenated aromatic compounds that contain both higher and lower congeners by increasing the efficiency of dehalogenation of the lower congeners.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: March 1, 1994
    Assignee: Chemical Waste Management, Inc.
    Inventors: Arthur J. Friedman, Yuval Halpern
  • Patent number: 5178772
    Abstract: Metal complexes and especially nickel EDTA is decomposed by adding an oxidizing agent to an aqueous solution containing metal complexes to define an oxidizable aqueous solution. The oxidizable aqueous solution is then exposed to a source of ultraviolet radiation in the range of from 185-300 nanometers for a period of time sufficient to destroy the complex portion of the metal complex. The remaining metal is recovered.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: January 12, 1993
    Assignee: Chemical Waste Management, Inc.
    Inventors: Peter S. Daley, Yuval Halpern
  • Patent number: 5174893
    Abstract: An improved method for detoxifying waste materials contaminated with halogenated hydrocarbons is disclosed. The method achieves dehalogenation of such halogenated hydrocarbons in a manner as efficient as previous methods, but at a considerably lower cost. The economic advantages of the present invention arise from the use of lower temperatures and/or smaller quantities of reagents, which in turn are made possible by the discovery of a surprisingly superior reagent, 2-methoxyethanol.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: December 29, 1992
    Assignee: Chemical Waste Management, Inc.
    Inventors: Yuval Halpern, Arthur J. Friedman
  • Patent number: 5093011
    Abstract: An improved method for detoxifying waste materials contaminated with halogenated hydrocarbons is disclosed. The method achieves dehalogenation of such halogenated hydrocarbons in a manner as efficient as previous methods, but at a considerably lower cost. The economic advantages of the present invention arise from the use of lower temperatures and/or smaller quantities of reagents, which in turn is made possible by the discovery of a surprisingly superior reagent, 2-methoxyethanol, and superior catalysts, the crown ethers, which allow reagents other than 2-methoxyethanol to function very efficiently in dehalogenation reactions.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: March 3, 1992
    Assignee: Chemical Waste Management, Inc.
    Inventors: Arthur J. Friedman, Yuval Halpern
  • Patent number: 5043054
    Abstract: An improved method for detoxifying waste materials contaminated with halogenated hydrocarbons is disclosed. The method achieves dehalogenation of such halogenated hydrocarbons in a manner as efficient as previous methods, but at a considerably lower cost. The economic advantages of the present invention arise from the use of lower temperatures and/or smaller quantities of reagents, which in turn are made possible by the discovery of a surprisingly superior reagent, 2-methoxyethanol.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: August 27, 1991
    Assignee: Chemical Waste Management, Inc.
    Inventors: Yuval Halpern, Arthur J. Friedman
  • Patent number: 5035840
    Abstract: A process for removing metal salts from an H.sub.4 EDTA precipitate by esterification with an esterification reagent to produce an esterification mixture comprising a solid metal salt an EDTA ester and thereafter separating the solid metal salt from the esterification mixture.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: July 30, 1991
    Assignee: Chemical Waste Management, Inc.
    Inventor: Yuval Halpern
  • Patent number: 4778613
    Abstract: A composition is provided which comprises a carrier medium and a spirodiphosphate described by the general formula: ##STR1## wherein X and X' are independently selected from the group consisting of oxygen and sulfur; and Z and Z' are independently selected from the group consisting of organic moieties attached to phosphorus through one of oxygen, sulfur, nitrogen and carbon.
    Type: Grant
    Filed: December 24, 1985
    Date of Patent: October 18, 1988
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Lee Cherney, Yuval Halpern, Roger K. Nibert
  • Patent number: 4760176
    Abstract: A composition, useful as an extreme pressure additive is provided wherein the composition comprises an aminocarboxylic acid-terminated polyoxyalkylene, wherein the polyoxyalkylene has at least seven oxyalkylene units.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: July 26, 1988
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Yuval Halpern, Brian A. Pikelny
  • Patent number: 4758683
    Abstract: A spirodiphosphoamidate-type composition is provided, wherein the composition is represented by the general formula: ##STR1## wherein A and A' are independently selected from the group consisting of oxygen and sulfur; R.sup.1 and R.sup.3 are independently selected from the group consisting of hydrogen, aliphatic, oxyaliphatic, polyoxyaliphatic, cycloaliphatic and aromatic moieties; and R.sup.2 and R.sup.4 are independently selected from the group consisting of C.sub.13 and larger aliphatic, oxyaliphatic, polyoxyaliphatic and aliphatic substituted aryl groups.
    Type: Grant
    Filed: September 25, 1987
    Date of Patent: July 19, 1988
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Lee Cherney, Yuval Halpern
  • Patent number: 4740548
    Abstract: A thermoplastic composition is provided which comprises a polyimide with an effective amount of an alpha-hydroxyketone such as benzoin to prevent discoloration on thermal processing.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: April 26, 1988
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Patent number: 4738797
    Abstract: An extreme pressure composition is provided wherein the composition comprises a carrier medium and an aminocarboxylic acid-terminated polyoxyalkylene having at least four oxyalkylene units.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: April 19, 1988
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Yuval Halpern, Brian A. Pikelny
  • Patent number: 4695601
    Abstract: A thermoplastic composition is provided which comprises a polyphenylene ether such as the copolymer of 2,6-dimethylphenol with 2,3,6-trimethylphenol, with an effective amount of an alpha-hydroxyketone such as benzoin to prevent discoloration on thermal processing.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: September 22, 1987
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Patent number: 4551527
    Abstract: A process for preparing polyvalent metal and amine salts of the indicated phosphorinane (an acid). The salts are isolated as such and are effective, in small proportions, to impart flame-retardant properties to polymers, especially to polypropylene and to styrenic polymers such as polystyrene, ABS and MBS.
    Type: Grant
    Filed: July 2, 1981
    Date of Patent: November 5, 1985
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Yuval Halpern, Donna Mott
  • Patent number: 4518795
    Abstract: The di-ester of beta-pentabromophenoxyethanol and succinic acid, bis(beta-pentabromophenoxyethyl) succinate, is prepared by mono-ethoxylating pentabromophenol with ethylene oxide, then esterifying the resulting pentabromophenoxyethanol with succinic acid. The di-ester is a flame retardant for ABS.
    Type: Grant
    Filed: December 2, 1982
    Date of Patent: May 21, 1985
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Patent number: 4491644
    Abstract: A flame-retarded polymer composition wherein the polymer constituent is an olefin polymer, a polymethyl acrylate or methacrylate, or polystyrene. The polymer is rendered flame-retardant by the presence of an amino-s-triazine salt of bis-(pentaerythritol phosphate) phosphoric acid.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: January 1, 1985
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Yuval Halpern, Donna M. Mott
  • Patent number: 4480093
    Abstract: Amino-s-triazine salts of bis-(pentaerythritol phosphate) phosphoric acid. The salts are effective flame-retardant additives in a number of different types of polymers.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: October 30, 1984
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Yuval Halpern, Donna M. Mott
  • Patent number: 4478998
    Abstract: A process for preparing amino-s-triazine salts of bis-(pentaerythritol phosphate) phosphoric acid. The process involves reacting the particular amine with the corresponding acid chloride, i.e., the phosphorous oxychloride, in the presence of water. The salts are effective flame-retardants in a number of different types of polymers.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: October 23, 1984
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Yuval Halpern, Donna M. Mott, Ron H. Niswander
  • Patent number: 4456721
    Abstract: Compositions comprising ABS and bis(beta-pentabromophenoxyethyl) succinate have good flame retardance and are self-extinguishing in the UL-94 vertical burn test. The compositions may be further compounded with a conventional synergist such as antimony oxide.
    Type: Grant
    Filed: December 2, 1982
    Date of Patent: June 26, 1984
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Patent number: RE32472
    Abstract: Polymer compositions containing minor proportions of polyvalent metal or amine salts of 5,5-bis-(bromomethyl)-2-hydroxy-2-oxo-1,3,2-dioxaphosphorinane. Aluminum, calcium and melamine salts are preferred.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: August 11, 1987
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern