Patents by Inventor DINO David

DINO David 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).

  • Publication number: 20120289437
    Abstract: The present application, at least in part, is directed to a method of providing a substantially constant rheological profile of an oil-based drilling fluid over a temperature range of about 120° F. to about 40° F. In some embodiments, the method comprises adding a drilling fluid additive to the drilling fluid, wherein the drilling fluid additive consists essentially of a polyamide and a set of at least one or more mono-carboxyl units. The polyamide has (a) repeat units of (i) a poly-carboxyl unit with at least two carboxylic moieties; and (ii) a polyamine unit having an amine functionality of two or more and the one or more mono-carboxyl units being positioned on the polyamide at a position selected from the group consisting of: an end position, a pendant position and combinations thereof.
    Type: Application
    Filed: May 10, 2011
    Publication date: November 15, 2012
    Applicant: ELEMENTIS SPECIALTIES, INC.
    Inventors: DINO David, Yanhui CHEN