Patents by Inventor Ingrid E. Brase

Ingrid E. Brase 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).

  • Process for inhibiting scale formation and modifying the crystal structure of barium sulfate and other inorganic salts
    Patent number: 4898677
    Abstract: The deposition of scale-imparting precipitates in aqueous media containing significant amounts of barium sulfate and other scale forming salts (e.g., calcium carbonate and calcium sulfate) is inhibited and controlled by adding a scale-inhibiting amount of a water-soluble acrylic acid copolymer with up to about 30% by weight of a vinyl sulfonate, with the copolymer having a weight average molecular weight of below about 90,000.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: February 6, 1990
    Assignee: National Starch and Chemical Corporation
    Inventor: Ingrid E. Brase
  • Drilling mud dispersants
    Patent number: 4518510
    Abstract: Dispersants useful in aqueous drilling mud formulations employed in the drilling of subterranean wells where high temperature and high pressure environments are encountered are disclosed. The dispersants, when used in amounts of about 0.1 to 25 ppb provide muds containing colloidal material suspended in an aqueous medium with improved high temperature and high pressure stability. The dispersants are water soluble sulfonated vinyl toluene-maleic anhydride copolymers which have a molar ratio of vinyl toluene to maleic anhydride of about 1:1 to less than about 2:1, a molecular weight of 1,000 to 25,000 and at least about 0.7 sulfonic acid groups per vinyl toluene unit.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: May 21, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Patricia A. Gleason, Ingrid E. Brase