Patents by Inventor Carmelita S. Salandanan

Carmelita S. Salandanan 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).

  • Fluid loss additives for oil base muds and low fluid loss compositions thereof
    Patent number: 4710586
    Abstract: A novel ammonium salt of quebracho prepared by reacting quebracho with alkyl quaternary ammonium salts is an effective fluid loss control agent when used in oil base drilling fluids for use in drilling oil and gas wells, especially in water in oil emulsion drilling mud formulations, controlling filtrate loss of the oil-base mud under high temperature and high pressure conditions.
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: December 1, 1987
    Assignee: Dresser Industries, Inc.
    Inventors: Arvind D. Patel, Carmelita S. Salandanan
  • Fluid loss additives for oil base muds and low fluid loss compositions thereof
    Patent number: 4637883
    Abstract: A novel ammonium salt of quebracho prepared by reacting quebracho with alkyl quaternary ammonium salts is an effective fluid loss control agent when used in oil base drilling fluids for use in drilling oil and gas wells, especially in water in oil emulsion drilling mud formulations, controlling filtrate loss of the oil-base mud under high temperature and high pressure conditions.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: January 20, 1987
    Assignee: Dresser Industries, Inc.
    Inventors: Arvind D. Patel, Carmelita S. Salandanan