Patents by Inventor Shaul Gladstone

Shaul Gladstone 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).

  • Cellulose thiocyanate and process for preparing the same
    Patent number: 4076918
    Abstract: A process is provided for preparing cellulose thiocyanate by direct reaction of cellulose with thiocyanic acid in the presence of dimethyl formamide, or dimethyl sulfoxide, at elevated temperatures, the thiocyanic acid being formed in situ from a thiocyanate salt and sulfuric acid. The product, cellulose thiocyanate, has a carbon content of from 38% to 44.4%, a nitrogen content of from 0.1% to 6.3%, a sulfur content of 0.23% to 14.5%, and is noninflammable and self-extinguishing.
    Type: Grant
    Filed: February 12, 1975
    Date of Patent: February 28, 1978
    Assignee: Argus Chemical Corporation
    Inventors: Shaul Gladstone, Clifton R. Neumoyer
  • Method for preparing mercapto propionic acid esters and polythio dipropionic acid esters
    Patent number: 4067901
    Abstract: A process is provided for the preparation of mercapto propionic acid esters and/or polythio dipropionic acid esters by reaction of an acrylic acid ester with hydrogen sulfide in the presence of a weakly basic amine as a catalyst, a polythiodipropionic acid ester as a reactive solvent, and added elemental sulfur.
    Type: Grant
    Filed: May 11, 1977
    Date of Patent: January 10, 1978
    Assignee: Witco Chemical Corporation
    Inventors: Shaul Gladstone, Srinivasa R. Rao, C. Joseph Rosshirt
  • Method for preparing mercapto propionic acid esters and polythio dipropionic acid esters
    Patent number: 4052440
    Abstract: A process is provided for the preparation of mercapto propionic acid esters and/or polythio dipropionic acid esters by reaction of an acrylic acid ester with hydrogen sulfide in the presence of a weakly basic amine base as a catalyst and a polythiodipropionic acid ester as a reactive solvent.
    Type: Grant
    Filed: September 19, 1975
    Date of Patent: October 4, 1977
    Assignee: Witco Chemical Corporation
    Inventors: Shaul Gladstone, Srinivasa R. Rao, C. Joseph Rosshirt