Patents Assigned to CP Kelco U.S., Inc.
  • Genetic control of acetylation and pyruvylation of xanthan based polysaccharide polymers
    Patent number: 6316614
    Abstract: Variant xanthan gums are provided which include a water-soluble polysaccharide polymer comprising repeating pentamer units having a D-glucose:D-mannose:D-glucuronic acid ratio of about 2:2:1, and a water-soluble polysaccharide polymer comprising repeating tetramer units having a D-glucose:D-mannose:D-glucuronic acid ratio of about 2:1:1. The D-glucose moieties are linked in a beta-[1,4] configuration. The inner D-mannose moieties are linked in an alpha-[1,3] configuration, generally to alternate glucose moieties. The D-glucuronic acid moieties are linked in a beta-[1,2] configuration to the inner mannose moieties. The outer mannose moieties are linked to the glucuronic acid moieties in a beta-[1,4] configuration. Processes for preparing the polysaccharide polymers are also provided.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 13, 2001
    Assignee: CP Kelco U.S., Inc.
    Inventors: Daniel H. Doherty, Donna M. Ferber, John D. Marrelli, Rebecca W. Vanderslice, Randal A. Hassler
  • Stable suspension of hydrocolloids and superplasticizer
    Patent number: 6309455
    Abstract: The present invention comprises a stable hydrocolloid composition in which preferably welan gum is uniformly dispersed in a superplasticizer solution such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixtures thereof. The solution is wet milled to form an extremely fine particle size distribution of the gum. The composition is rapidly hydratable and useful as a stabilizing additive in many cement and drilling fluid applications.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: October 30, 2001
    Assignee: CP Kelco U.S., Inc.
    Inventors: Bryan Skaggs, Harold Dial, Walter Rakitsky
  • Reduced molecular weight native gellan gum
    Patent number: 6242035
    Abstract: This invention provides reduced molecular weight gellan gums. The reduced molecular weight gellan gums of this invention generally have a weight average molecular weight less than about 1.7×106, and typically in a range of about 1.2×106 to about 9.3×105. This invention also provides compositions, e.g., solutions and gels, comprising reduced molecular weight gellan gums. The reduced molecular weight gellan gums of this invention may be prepared by any method which reduces the molecular weight of polymers. Such methods include homogenization, sonication, radiation, oxidation and hydrolysis.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: June 5, 2001
    Assignee: CP Kelco U.S., Inc.
    Inventors: Ross Clark, Neil Morrison, You-Lung Chen, Todd Talashek, Dan Burgum
  • Stable suspension of hydrocolloids
    Patent number: 6221152
    Abstract: The present invention comprises a stable hydrocolloid welan gum in which a hydrocolloid, preferably welan gum, is uniformly dispersed in a superplasticizer such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixtures thereof. This is then dispersed in a rheological control agent which is a microbially-produced cellulose fiber composition. The composition is rapidly hydratable and useful as a stabilizing additive in many cement and drilling fluid applications, insulation fluids and de-icer compositions.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: April 24, 2001
    Assignee: CP Kelco U.S., Inc.
    Inventors: Harold Dean Dial, Crawford Bryan Skaggs, Walter Gregory Rakitsky