Patents by Inventor Benjamin Weinstein

Benjamin Weinstein 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).

  • Rinse-free shampoo containing cross-linked carboxymethylcellulose
    Patent number: 5234621
    Abstract: A new rinse-free shampoo has been developed. The shampoo includes a biodegradable absorbent formed of a cross-linked carboxymethylcellulose which allows a higher water content than conventional shampoos. The soaps used in the shampoo to provide the cleaning action are preferably lauric acid derivatives, including ammonium derivatives. The shampoo leaves less residue than conventional rinse-free shampoos.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: August 10, 1993
    Assignee: Micro Vesicular Systems, Inc.
    Inventors: Benjamin Weinstein, Donald F. H. Wallach
  • Selective production of para-xylene
    Patent number: 3965207
    Abstract: Process for the selective production of paraxylene by methylation of toluene at a temperature between about 500.degree.C. and about 750.degree.C. and preferably between about 575.degree.C. and about 700.degree.C. in the presence of a catalyst comprising a crystalline aluminosilicate zeolite said zeolite having a silica to alumina mole ratio of at last about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: June 22, 1976
    Assignee: Mobil Oil Corporation
    Inventor: Benjamin Weinstein
  • V-P-Zr catalysts and method of preparation thereof in the absence of hydrogen halide
    Patent number: 3931046
    Abstract: V-P-Zr catalysts having good activity and selectivity and high physical strength for the oxidation of alkanes, cycloalkanes and mixtures rich in them to dicarboxylic acid anhydrides (e.g. maleic anhydride) are prepared by refluxing an aqueous mixture of vanadium pentoxide and lower dialkyl phosphonate, adding a zirconium salt, and then adding phosphoric acid.
    Type: Grant
    Filed: April 17, 1974
    Date of Patent: January 6, 1976
    Assignee: Mobil Oil Corporation
    Inventors: Benjamin Weinstein, Anthony T. Jurewicz, Lewis Brewster Young