Patents by Inventor James W. Sawhill

James W. Sawhill 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).

  • Patent number: 6787168
    Abstract: a peptide product is made by enzymatically hydrolyzing a protein, such as whey protein concentrate, in two stages. A fungal protease is used to hydrolyze the protein in each stage. The hydrolyzed protein is dried to form a peptide product. The peptide product is non-allergenic and lacks the bitter taste that some other peptide products have. If can be used to make milk replacement products and various other food products.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: September 7, 2004
    Inventor: James W. Sawhill
  • Patent number: 6030649
    Abstract: A process for the treatment of pre-dried animal meal yields products containing small peptides, resulting from combining methods of alkaline liquification and proteolytic enzyme treatment. These peptides are highly suitable for inclusion in animal feeds or edible food products.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: February 29, 2000
    Inventors: James W. Sawhill, Leon D. Freeman
  • Patent number: 5384092
    Abstract: There is disclosed the sterilization of infectious hospital waste to generating a residue which is suitable for disposal. The invention comprises a first step of digestion at elevated temperatures and under highly alkaline condition for one to three hours. This step is combined with the necessary comminution, e.g., grinding, pulverizing and the like, to ensure substantially complete liquefaction of the wastes. The liquid reaction products from the first step are neutralized to a slightly alkaline pH, e.g., 7.5-9.5, and the waste is then subjected to enzymatic digestion with a suitable proteolytic enzyme for a short period of time. Preferably this proteinase treatment is combined with further comminution to further reduce any oversized particles that may remain in the waste following the first treatment. The enzymatic treatment is continued for a period from 30 to 90 minutes at temperatures most suitable for the selected enzyme and results in substantially complete hydrolysis of the proteins in the waste.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: January 24, 1995
    Inventors: James W. Sawhill, Leon D. Freeman, Carl McKinney
  • Patent number: 4473589
    Abstract: Sources of protein, such as residues and waste products from processing fish, poultry, pork and beef as well as single cell microorganisms, are hydrolyzed to provide liquid products containing substantially all of the component amino acids, lipids and phosphorus in metabolically useful form. The process involves a brief alkaline treatment with heat ( F.) and alkali (pH 12 or above) which facilitates liquefication and enhances susceptibility to subsequent enzyme hydrolysis with bacterial proteinase at elevated temperatures ( F.). Cell rupture and protein denaturation occur during alkaline treatment and permit and facilitate the enzyme to rapidly break down the intact proteins to smaller, more soluble molecules. The product may be preserved with various acids at a pH of 3.8 to 4.2.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: September 25, 1984
    Inventors: Leon D. Freeman, James W. Sawhill
  • Patent number: 4267197
    Abstract: There is disclosed a stable thixotropic suspension of water insoluble animal feed nutrients in an aqueous sugar solution. The method comprises incorporating an ammonium phosphate, sulfate or mixture in an aqueous sugar solution in a sufficient quantity to form a gel, controlling the pH of the gel to a value from about 6.5 to about 7.5 and adjusting the water content of the mixture to provide a viscosity to the product from about 4,000 to about 10,000 centipoises. The resultant gel is an excellent carrier for the suspension of water insoluble nutrients such as, calcium carbonate, calcium sulfate, or insoluble drugs such as monisan. The gel provides a very stable suspension of the water insoluble nutrients, providing shelf life stability in excess of 12 weeks over a wide range of temperature. High temperature stability of the suspension can be further enhanced by including in the supplement a dispersing agent such as gellatinized starch, an alkali metal alginate or a montmorillonite or kaolin clay.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: May 12, 1981
    Assignee: Pacific Kenyon Corporation
    Inventor: James W. Sawhill
  • Patent number: 4160041
    Abstract: There is disclosed a method for the manufacture of a solid animal feed supplement employing an in-situ reaction between a hydratable metal oxide such as calcium oxide and a water soluble phosphate, such as phosphoric acid to solidify the product. The method comprises the addition of the metal oxide to a concentrated dispersion of a water soluble sugar such as molasses, whey and the like, to hydrate the metal oxide. After sufficient hydration has occurred to provide the desired quantity of reactant metal ions in soluble form, a condition which can be detected by monitoring the pH, temperature, or time following addition of the metal oxide, the soluble phosphate is added to cause solidification of the resultant mixture.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: July 3, 1979
    Assignee: Jack J. Schroeder
    Inventors: Jack J. Schroeder, James W. Sawhill
  • Patent number: 4081555
    Abstract: Useful whey concentrates can be stabilized against putrefying action using a combination of downward pH adjustment (to 2.5-4.2) and a preservative agent. The best results are obtained with benzoates and/or sorbates as the preservative agent.
    Type: Grant
    Filed: June 9, 1976
    Date of Patent: March 28, 1978
    Assignee: Roger Marten
    Inventor: James W. Sawhill