Patents by Inventor Alexander D. Lindsay

Alexander D. Lindsay 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: 5698003
    Abstract: Improved solvent systems for the formulation of N-alkyl thiophosphoric triamide urease inhibitors. These formulations enable the preparation of stable concentrated solutions of N-alkyl thiophosphoric triamides for storage, transportation, and eventual impregnation onto solid urea containing fertilizers and incorporation into liquid urea containing fertilizer compositions. These formulations are comprised primarily of a solvent selected from the group consisting of glycols and glycol derivatives. Optionally, in addition to the glycol base solvent, the formulations can contain a co-solvent selected from the group consisting of liquid amides, 2-pyrrolidone and N-alkyl 2-pyrrolidones, and/or a nonionic surfactant selected from the group consisting of alkylaryl polyether alcohols. The presence of the co-solvent and/or surfactant has been found to impart desirable properties to the formulations under certain conditions.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: December 16, 1997
    Assignee: IMC-Agrico Company
    Inventors: Barry A. Omilinsky, Alexander D. Lindsay, Allen R. Sutton, Willis L. Thornsberry, Jr.
  • Patent number: 5504014
    Abstract: The cleanliness of water-rinsed surfaces originally carrying hazardous compositions is determined by using a surface active agent as a marker in said material prior to placing the composition into contact with the surface.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: April 2, 1996
    Assignee: Formulogics, Inc.
    Inventors: Alexander D. Lindsay, Barry A. Omilinsky
  • Patent number: 5169433
    Abstract: Environmentally-acceptable intimate mixtures of active ingredients and excipients which meet economic performance levels are prepared without use of harmful solvents by solubilizing and mixing the components in liquid carbon dioxide maintained under pressure and then slowly reducing the pressure to convert the carbon dioxide to the gaseous phase and venting the gaseous carbon dioxide.
    Type: Grant
    Filed: July 18, 1990
    Date of Patent: December 8, 1992
    Assignee: Formulogics, Inc.
    Inventors: Alexander D. Lindsay, Barry A. Omilinsky