Patents by Inventor Earl W. Cummins

Earl W. Cummins 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).

  • Method of increasing milk production of dairy cattle
    Patent number: 4388327
    Abstract: The weight of milk produced by dairy cattle can be increased by supplementing the diets of the cattle with .gamma.-methylmercapto-.alpha.-hydroxybutyric acid and its oligomers.
    Type: Grant
    Filed: October 30, 1981
    Date of Patent: June 14, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Earl W. Cummins
  • 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
  • Preparation of the calcium salt of .alpha.-hydroxy-gamma-methylmercaptobutyric acid
    Patent number: 4310690
    Abstract: This invention relates to a novel process for preparing the calcium salt of .alpha.-hydroxy-.gamma.-methylmercaptobutyric acid (MHBA).
    Type: Grant
    Filed: October 8, 1980
    Date of Patent: January 12, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Earl W. Cummins
  • 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
  • Process for preparing herbicidal triazines
    Patent number: 4150225
    Abstract: In a process for the preparation of 3-substituted-1-methyl-6-substituted-amino-s-triazine-2,4(1H,3H)-diones by liquid phase cyclization in the presence of an alkali metal alkoxide or hydroxide catalyst of an alkyl-N-(N-substituted carbamoyl-N',N-dialkylamidino)-N-methylcarbamate, by which by-product alkanol, ROH, is formed in the reaction dispersion, the improvement comprising removing the by-product alkanol from the reaction dispersion by vaporization therefrom substantially as it is formed.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: April 17, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Earl W. Cummins