Patents by Inventor Samuel Ellsworth Shull

Samuel Ellsworth Shull 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 manufacturing 1-hydroxyalkylidene-1,1-diphosphonic acid (HADP)
    Patent number: 6143923
    Abstract: A process for manufacturing 1-hydroxyalkylidene-1,1-diphosphonic Acid (HADP) by introducing phosphorus trihalide (PX.sub.3) into a reactor containing aqueous acid of the formula RCOOH at a temperature of 60-200.degree. C. and a pressure of 15-150 psig. Water is added to hydrolyze the intermediate formed to obtain HADP.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: November 7, 2000
    Assignee: Lonza Inc.
    Inventors: Shilan Shen, Samuel Ellsworth Shull, Scott Brian Harvey
  • Cyanoethylation of hydantoins
    Patent number: T973016
    Abstract: an improved process for the manufacture of a 3-.beta.-cyanoethyl- or a 1,3-di(.beta.-cyanoethyl)-5,5-disubstituted hydantoin, by reacting acrylonitrile and a 5,5-disubstituted hydantoin in the presence of a base catalyst in a solvent media composed of a secondary and/or tertiary alcohol having up to 5 carbon atoms and a boiling point from between about 80.degree.-135.degree. C as a reaction solvent. The alcohol reaction solvent may be used for crystallization of the cyanoethylated product.The solvent media can for example be selected from the group of isopropanol, 2-methyl-2-butanol, 3-methyl-2-butanol, 2-pentanol, 3-pentanol, tertiary butanol, 1,1-dimethylpropanol and mixtures thereof. The process provides for obtaining high yields of pure product with the formation of a minimum of side reactions and by-products.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: August 1, 1978
    Assignee: Glyco Chemicals, Inc.
    Inventors: Samuel Ellsworth Shull, John Douglas Freilich