Patents by Inventor David Beneish

David Beneish 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 electrophilic aromatic substitution
    Patent number: 6399835
    Abstract: Processes for the electrophilic substitution of aromatic compounds, such as alkylation, with a desired substituent are disclosed. The processes include contacting the aromatic compound, a precursor of the desired substituent and an aqueous reagent containing zinc halide at elevated temperatures such as above 50° C.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: June 4, 2002
    Assignee: Bromine Compounds Ltd.
    Inventors: Ariel Ewenson, David Itzhak, Miriam Freiberg Bergstein, Asher Shushan, Bertha Croitoru, David Beneish, Naim Faza
  • Tribromostyrene products and process for making them
    Patent number: 5243109
    Abstract: Tribromostyrene (TBS) is produced by the preparation of a TBS precursor, which is .beta.-bromoethyl-tribromobenzene (.beta.-BrBr.sub.3), and the successive elimination of hydrogen bromide from said precursor. The precursor is prepared by selective bromination of phenethyl bromide (.beta.-Br), wherein the molar ratio of bromine to phenethyl bromide is comprised between 2.5 and 3.5, and preferably between 3.1 and 3.3 included; and by adding bromine, after an initial addition, at a controlled molar rate.
    Type: Grant
    Filed: August 6, 1992
    Date of Patent: September 7, 1993
    Assignee: Bromine Compounds Ltd.
    Inventors: Nurit Kornberg, David Beneish, Michael Peled