Patents by Inventor Vinai K. Srivastava

Vinai K. Srivastava 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 of producing glyoxylated hydroxypropyl guar and liquid plant treatment composition containing same
    Patent number: 5104436
    Abstract: A liquid fertilizer composition having a substantial ability to retard leaching of constituent plant nutrients is prepared by dispersing glyoxylated hydroxypropyl guar in an aqueous mixture containing a fertilizer chemical in a preferred concentration of 0.4-1.5% by weight. Similarly, a liquid herbicide, fungicide, insecticide, fire retardant or other liquid plant treatment composition having the ability to adhere to applied surfaces to resist washing is prepared by dispersing glyoxylated hydroxypropyl guar in an aqueous mixture of such a plant treatment chemical in a corresponding concentration. A method is disclosed for producing glyoxylated hydroxypropyl guar by reacting guar gum with propylene oxide and the reaction product thereof with glyoxal in the absence of alcohol or any solvent.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: April 14, 1992
    Assignees: Colloids, Inc., Clifton H. Lauderdale
    Inventors: Clifton H. Lauderdale, Vinai K. Srivastava, Walter H. Carter
  • Enzymatically-treated guar gums
    Patent number: 4693982
    Abstract: Aqueous guar gum compositions having a very low content of insolubles, the compositions being formed by impregnating free-flowing solid, particulate guar gum with one or more hydrolytic enzymes and thereafter dissolving the particles of guar gum in water.
    Type: Grant
    Filed: May 22, 1985
    Date of Patent: September 15, 1987
    Assignee: Millmaster Onyx Group, Inc.
    Inventors: Walter H. Carter, Vinai K. Srivastava
  • Enzymatically-treated guar gums
    Patent number: 4682654
    Abstract: A method of recovering oil from an oil-bearing formation by fractionation, utilizing as oil-recovery means aqueous guar gum compositions having a very low content of insolubles, the compositions being formed by impregnating free-flowing solid, particulate guar gum with one or more hydrolytic enzymes and thereafter dissolving the particles of guar gum in water.
    Type: Grant
    Filed: October 9, 1986
    Date of Patent: July 28, 1987
    Assignee: Millmaster Onyx Group, Inc.
    Inventors: Walter H. Carter, Vinai K. Srivastava