Patents by Inventor Steven I. Gleich

Steven I. Gleich 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).

  • Preparation of the calcium salt of alpha-hydroxy-gamma-methylmercaptobutyric acid
    Patent number: 4335257
    Abstract: This invention relates to a novel process for preparing the calcium salt of .alpha.-hydroxy-.gamma.-methylmercaptobutyric acid (MHBA) by contacting solid calcium oxide or calcium hydroxide with liquid MHBA.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: June 15, 1982
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Earl W. Cummins, Steven I. Gleich, Robert M. Vigilant
  • Process for preparing herbicidal triazines
    Patent number: 4178448
    Abstract: An improved process for preparing 3-cyclohexyl-1-methyl-6-dimethylamino-s-triazine-2,4(1H,3H)dione by the following reaction sequence: ##STR1## the improvement comprising using R=ethyl, n-propyl or isopropyl, preferably ethyl, thus permitting significantly higher practical overall yields.Related 3-substituted-1-methyl-6-substituted amino-s-triazine-2,4(1H,3H)diones and 4-thio-2,4(1H,3H)-diones are prepared similarly. These products are useful as herbicides.
    Type: Grant
    Filed: April 12, 1978
    Date of Patent: December 11, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles D. Adams, Earl W. Cummins, Steven I. Gleich