Patents by Inventor Leo M. Hall

Leo M. Hall 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).

  • Synthesis and isolation of nopaline and its analogues
    Patent number: 5081289
    Abstract: A method of separating nonpaline derivatives from their diastereoisomers is disclosed along with a method of selectively growing strains of the bacterium A. tumefaciens. Also disclosed are novel general methods of synthesizing the nopaline and isonopaline of this invention. These novel compounds are useful for the selective growth of the agriculturally useful A. tumefaciens bacterium.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: January 14, 1992
    Assignee: The University of Alabama in Birmingham
    Inventors: Kenneth B. Taylor, Leo M. Hall
  • Synthesis and isolation of octopine and its analogues
    Patent number: 4615976
    Abstract: Novel octopine derivatives are disclosed which are useful for the selective growth of the agriculturally useful A. tumefaciens bacterium along with a synthetic method for their preparation. Also disclosed is a method of separating octopine derivatives from their diastereoisomers along with a method of selectively growing strains of the bacterium A. tumefaciens.
    Type: Grant
    Filed: August 15, 1983
    Date of Patent: October 7, 1986
    Assignee: The University of Alabama in Birmingham
    Inventors: Kenneth B. Taylor, Leo M. Hall
  • Method for producing maltooligosaccharide glycosides
    Patent number: 4225672
    Abstract: Disclosed herein is a method for producing maltooligosaccharide glycosides in substantially pure form which includes the steps of incubating a glucosyl donor and a glucosyl acceptor in the presence of a glucanotransferase enzyme under transglycosylating conditions and separating the maltooligosaccharide glycoside from the reaction mixture.
    Type: Grant
    Filed: February 27, 1979
    Date of Patent: September 30, 1980
    Inventor: Leo M. Hall
  • Substrate solution for carboxylic ester hydrolase determination
    Patent number: 4212939
    Abstract: A clear, stable aqueous reagent solution comprising a mixture of a water insoluble vinyl ester of an alkyl, alkenyl, or alkyl-aryl carboxylic acid, nonionic detergents, inorganic salts, enzyme activators, and a buffer, which when combined with a suitable acetaldehyde detection system is useful for the analysis of the action of certain carboxylic ester hydrolases.
    Type: Grant
    Filed: November 22, 1977
    Date of Patent: July 15, 1980
    Assignee: The University of Alabama
    Inventors: James E. Myrick, Leo M. Hall
  • Albumin-dye complex for fatty acid determination
    Patent number: 4195126
    Abstract: An albumin-dye complex is prepared containing serum or plasma albumin which is substantially free of endogenous fatty acids and which has been complexed with a fatty acid and dye which dye may be displaced from the albumin-dye complex by free fatty acids. The complex is used to quantitatively determine fatty acids, compounds which hydrolyze to fatty acids or activity of hydrolase enzymes that produce fatty acids from a substrate.
    Type: Grant
    Filed: October 4, 1977
    Date of Patent: March 25, 1980
    Assignee: The Board of Trustees of the University of Alabama
    Inventor: Leo M. Hall
  • A method for removing maltotetraose and lower saccharides from solution
    Patent number: 4081326
    Abstract: An oligosaccharide fraction containing essentially no G.sub.4 and increased amounts of G.sub.5, G.sub.6 and G.sub.7, is prepared by simultaneously treating a solution containing the desired oligosaccharides with both a baker's yeast and a maltase.
    Type: Grant
    Filed: October 7, 1976
    Date of Patent: March 28, 1978
    Assignee: The Board of Trustees of the University of Alabama
    Inventor: Leo M. Hall
  • Novel maltase enzyme produced by a new yeast strain
    Patent number: 4071407
    Abstract: A maltase enzyme is prepared by growing a strain of Saccharomyces, ATCC 20 488, on a medium containing maltose or malt extract and has been found to be useful in assays for amylase.
    Type: Grant
    Filed: November 16, 1976
    Date of Patent: January 31, 1978
    Assignee: The Board of Trustees of the University of Alabama
    Inventor: Leo M. Hall
  • Substrate solution for carboxylic ester hydrolase determination
    Patent number: 4022667
    Abstract: A clear, stable aqueous reagent solution comprising a mixture of a water insoluble vinyl ester of an alkyl, alkenyl, or alkyl-aryl carboxylic acid, nonionic detergents, inorganic salts, enzyme activators, and a buffer, which when combined with a suitable acetaldehyde detection system is useful for the analysis of the action of certain carboxylic ester hydrolases.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: May 10, 1977
    Assignee: The University of Alabama
    Inventors: James E. Myrick, Leo M. Hall