Patents by Inventor Joyce Prindle

Joyce Prindle 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 and composition for inhibiting biological fouling in an irrigation system
    Patent number: 6350410
    Abstract: The present invention provides a method and composition for inhibiting biological fouling in an irrigation system. According to the invention, an effective amount of active zinc is added to irrigation water passing through an irrigation system to inhibit biological fouling. In a preferred form of the invention, the active zinc is chelated with 1-hydroxyethane 1,1-diphosphonic acid (HEDPA). In addition to inhibiting the formation of biological fouling in the system, the active zinc provides nourishment to plants irrigated by the irrigation system.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: February 26, 2002
    Assignee: CH20 Incorporated
    Inventors: Carl E. Iverson, Joyce Prindle
  • Method of inhibiting the formation of crystalline mineral deposits in soil
    Patent number: 5930950
    Abstract: The present invention provides an improved method for growing a plant in soil while irrigating the soil with water which contains deposit forming minerals. According to the present invention, an effective amount of 1-hydroxyethane 1,1-diphosphonic acid (HEDPA) is admixed with irrigation water and applied to the soil in which the plant is growing.
    Type: Grant
    Filed: August 13, 1997
    Date of Patent: August 3, 1999
    Assignee: CH20 Incorporated
    Inventors: Thomas Iverson, Jr., Joyce Prindle
  • Method for treating produce and process water
    Patent number: 5863584
    Abstract: A method for treating fresh produce to remove debris and inhibit the growth of fungus on the produce and a method for treating contaminants in process water. According to the present invention, the produce is submerged in process water in an amount sufficient to clean substantially all debris from the surface of the produce, inhibit growth of fungus on the produce and treat contaminants in the process water.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: January 26, 1999
    Assignee: CH20 Incorporated
    Inventors: Iverson Thomas, Jr., Joyce Prindle, Robert E. Keith
  • Method for inhibiting the formation of crystalline mineral deposits on plants
    Patent number: 5422348
    Abstract: The present invention provides an improved method for growing a plant sprayed with hard water while inhibiting the formation of crystalline mineral deposits on the plant. According to the present invention, an effective amount of 1-hydroxyethane 1, 1-diphosphonic acid (HEDPA) is admixed with water and sprayed on the plant resulting in the formation of an amorphous powder on the plant. According to another aspect of the present invention, the method further includes providing mechanical agitation to prevent a buildup of amorphous powder on the plant.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: June 6, 1995
    Assignee: CH.sub.2 O Incorporated
    Inventors: Thomas Iverson, Jr., Joyce Prindle
  • Method and composition for inhibiting the formation of hardwater deposits on fruit
    Patent number: 5369099
    Abstract: The present invention provides an improved method and mixture for cooling fruit on the tree or vine while inhibiting the formation of scales or deposits on the fruit. The method and mixture provide admixing an effective amount of 1-hydroxyethane 1,1-diphosphonic acid (HEDPA) with cooling water before the cooling water is sprayed onto the fruit with cooling water.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: November 29, 1994
    Assignee: CH.sub.2 O Incorporated
    Inventors: Thomas Iverson, Jr., Joyce Prindle