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).

  • Process for preparing pentaerythritol phosphate
    Patent number: 4454064
    Abstract: A process involving the reaction of pentaerythritol with phosphorus oxychloride. A solvent is used in the process, but not catalyst or amine (as a hydrogen chloride acceptor) is required.
    Type: Grant
    Filed: October 29, 1982
    Date of Patent: June 12, 1984
    Assignee: Borg-Warner Corporation
    Inventors: Yuval Halpern, Ron H. Niswander
  • 5,5-Bis-(Bromomethyl)-2-hydroxy-2-oxo-1,3,2-dioxaphosphorinanes and process for preparing same
    Patent number: 4424172
    Abstract: A process for preparing 5,5-bis(halomethyl)-2-hydroxy-2-oxo-1,3,2-dioxaphosphorinanes by hydrolysis of the corresponding phosphoryl chloride. The product is effective, in small proportions, to impart flame-retardant properties to polymer compositions, especially polypropylene and styrenic polymers.
    Type: Grant
    Filed: July 2, 1981
    Date of Patent: January 3, 1984
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Flame-retardant polymer compositions containing metal or amine salts
    Patent number: 4365033
    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: July 2, 1981
    Date of Patent: December 21, 1982
    Assignee: Borg-Warner Corporation
    Inventors: Yuval Halpern, Donna M. Mott
  • Flame-retardant polymer compositions
    Patent number: 4361664
    Abstract: Polymer compositions containing minor proportions of a 5,5-bis-(halomethyl)-2-hydroxy-2-oxo-1,3,2-dioxaphosphorinane. The halo atom may be either chlorine or bromine.
    Type: Grant
    Filed: July 2, 1981
    Date of Patent: November 30, 1982
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Intumescent flame retardant thermoplastic polyurethane elastomer compositions
    Patent number: 4342682
    Abstract: Thermoplastic polyurethane elastomer compositions comprising a polyurethane elastomer, a pentate salt of an amino-s-triazine, and optionally a polyol are flame retardant and intumescent and may be compounded to be self-extinguishing.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: August 3, 1982
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: Yuval Halpern, Donald D. Hall, Jr.
  • Intumescent flame retardant compositions
    Patent number: 4341694
    Abstract: Compositions comprising 2,6,7-trioxa-1-phosphobicyclo [2.2.2.] octane -4-methanol-1-oxide and a nitrogen compound selected from the group melamine, ammeline, benzoguanidine, guanidine, urea and salts thereof, are intumescent and are readily adapted to flame retard a variety of dissimilar resins including polyolefins, polyvinylaromatic resins, polycarbonates, polyacrylates, polyamides, PVC and blends thereof.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: July 27, 1982
    Assignee: Borg-Warner Corporation
    Inventor: Yuval Halpern
  • Intumescent flame retardant thermoplastic polyester compositions
    Patent number: 4338245
    Abstract: Thermoplastic polyester compositions comprising a polyester such as polybutylene terephthalate, a pentate salt of an amino-s-triazine, and optionally a polyol are flame retardant and intumescent and may be compounded to be self-extinguishing.
    Type: Grant
    Filed: August 12, 1981
    Date of Patent: July 6, 1982
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Intumescent flame retardant thermoplastic polymethacrylate compositions
    Patent number: 4338246
    Abstract: Thermoplastic polymethacrylate compositions comprising (a) thermoplastic polymethacrylate such as polymethyl methacrylate, a pentate salt of an amino-s-triazine, and optionally a polyol are flame retardant and intumescent and may be compounded to be self-extinguishing.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: July 6, 1982
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Intumescent flame retardant thermoplastic polyphenylene ether compositions
    Patent number: 4336184
    Abstract: Thermoplastic polyphenylene ether compositions comprising a polyphenylene ether-styrenic resin blend, a pentate salt of an amino-s-triazine and optionally a polyol are flame retardant and intumescent and may be compounded to be self-extinguishing.
    Type: Grant
    Filed: August 12, 1981
    Date of Patent: June 22, 1982
    Assignee: Borg-Warner Chemicals, Inc.
    Inventor: Yuval Halpern
  • Intumescent flame retardant polyolefin compositions
    Patent number: 4201705
    Abstract: Polyolefin compositions comprising a polyolefin and a flame retarding amount of the pentate salt of an amino-s-triazine are intumescent and self-extinguishing and non-dripping.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: May 6, 1980
    Assignee: Borg-Warner Corporation
    Inventors: Yuval Halpern, Clifton T. Fleenor
  • Pentate salts of amino-s-triazines
    Patent number: 4154930
    Abstract: Pentate salts of amino-s-triazines having the formula ##STR1## wherein x is -NH.sub.2 or -OH are useful as flame retardants and foaming agents for polymers.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: May 15, 1979
    Assignee: Borg-Warner Corporation
    Inventor: Yuval Halpern