Patents Represented by Attorney Patrick J. Span

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  • Flash drying of xanthan gum and product produced thereby
    Patent number: 4053699
    Abstract: Flash dried granules of calcium-xanthomonas gum complex.
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: October 11, 1977
    Assignee: General Mills Chemicals, Inc.
    Inventors: Patrick Thomas Cahalan, John Allen Peterson, Douglas Arthur Arndt
  • Process for the recovery of magnesium
    Patent number: 4051223
    Abstract: Magnesium values are selectively extracted from aqueous solutions thereof also containing calcium using quaternary ammonium salts of selected hydrogen ion exchange reagents. Magnesium is stripped from the resulting organic phase with acids.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: September 27, 1977
    Assignee: General Mills Chemicals, Inc.
    Inventor: Kenneth D. MacKay
  • Amino-poly(amidazoline-amide)
    Patent number: 4049598
    Abstract: Amino-poly(imidazoline-amide) compositions are disclosed which are useful for occlusion in polyolefins to render them dyeable with acid textile dyes. Polyolefins are useful in textile fibers or filaments. The compositions are certain azelaic acid, polyamide-imidazoline products of a mixture of diethylene triamine and a diamine. Optionally, fatty compounds such as a dimeric fat acid or monomeric fatty acid or another, different aliphatic dicarboxylic acid may be present.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: September 20, 1977
    Assignee: General Mills Chemicals, Inc.
    Inventors: Dwight E. Peerman, Dale G. Swan, H. Gordon Kanten
  • Dispersible glyoxal-xanthan gum complexes
    Patent number: 4041234
    Abstract: Hand-dispersible xanthomonas gum-glyoxal complexes.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: August 9, 1977
    Assignee: General Mills Chemicals, Inc.
    Inventor: Fred Maske
  • Hydroxyalkyl locust bean/xanthomonas hydrophilic colloid blends
    Patent number: 4038206
    Abstract: A blend of xanthomonas gum and water soluble hydroxyalkyl ether of locust bean gum which has unique thickening properties. The blend is particularly useful in drilling oil wells and in oil well fracturing fluids.
    Type: Grant
    Filed: January 15, 1976
    Date of Patent: July 26, 1977
    Assignee: General Mills Chemicals, Inc.
    Inventor: Curtis Lee Karl
  • Plaster of paris using glyoxal treated hydroxyalkyl guar
    Patent number: 4028127
    Abstract: Patching cracks and holes with a blend of a gypsum cement and the reaction product of a hydroxyalkyl ether of guar and glyoxal.
    Type: Grant
    Filed: March 10, 1976
    Date of Patent: June 7, 1977
    Assignee: General Mills Chemicals, Inc.
    Inventors: Fred John Maske, Robert Nordgren
  • Certain benzoxazoles and the use thereof as metal extractants
    Patent number: 4020081
    Abstract: Benzoxazoles having the structure ##STR1## where R is hydrogen or an alkyl group having from 1 to 20 carbon atoms, R' is hydrogen, chlorine or an alkyl group containing from 1 to 20 carbon atoms, X is H or Chlorine and the total number of carbon atoms in R and R' is 6 to 40 with the proviso that one of R and R' must be an alkyl group of at least 6 carbon atoms. The benzoxazoles are useful in a process of recovering metal values, particularly copper and nickel, from aqueous solutions thereof.
    Type: Grant
    Filed: October 25, 1974
    Date of Patent: April 26, 1977
    Assignee: General Mills Chemicals, Inc.
    Inventors: Kenneth D. MacKay, Edgar R. Rogier
  • Use of fluorinated .beta.-diketones in the solvent extraction of zinc
    Patent number: 4015980
    Abstract: Zinc is extracted from aqueous ammoniacal solutions using fluorinated .beta.-diketones of the structure ##STR1## where n is a whole integer of 1 to 4, m is 0, 1 or 2 and R is an alkyl group of 1-25 carbons, the R group or groups providing requisite solubility in liquid hydrocarbon solvents.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: April 5, 1977
    Assignee: General Mills Chemicals, Inc.
    Inventors: Kenneth D. MacKay, R. Brantley Sudderth
  • C.sub.19 Diacid trimethylhexamethylene diamine polyamides
    Patent number: 3957733
    Abstract: Polyamides of a C.sub.19 diacid and trimethylhexamethylene diamine useful as an engineering plastic.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: May 18, 1976
    Assignee: Inc. General Mills Chemicals
    Inventors: Edgar R. Rogier, Allen H. Jevne, Gerald L. Schwebke
  • Copolyamides from an isomeric mixture of heptadecane dicarboxylic acid
    Patent number: 3937688
    Abstract: Copolyamides of a C.sub.19 diacid, a coacid selected from isophthalic acid, terephthalic acid, alkyl substituted isophthalic acid or esters thereof and a diamine selected from hexamethylene diamine and trimethyl hexamethylene diamine.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: February 10, 1976
    Assignee: General Mills Chemicals, Inc.
    Inventors: Edgar R. Rogier, Allan H. Jevne, Gerald L. Schwebke
  • Amidification products of C.sub.19 dicarboxylic acid and cyclical diamines
    Patent number: 3937687
    Abstract: Polyamids of a C.sub.19 diacid and certain cyclical diamine which are excellent engineering plastics.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: February 10, 1976
    Assignee: General Mills Chemicals, Inc.
    Inventors: Edgar R. Rogier, Allan H. Jevne, Gerald L. Schwebke
  • Acid compositions comprised of polymeric 2-acrylamido-2-methylpropanesulfonic acid as thickener
    Patent number: 3931089
    Abstract: Acid solutions having pH values of about 2 or below and containing a homopolymer of 2-acrylamido-2-methylpropanesulfonic acid or a salt of the homopolymer.
    Type: Grant
    Filed: June 6, 1974
    Date of Patent: January 6, 1976
    Assignee: General Mills Chemicals, Inc.
    Inventor: Curtis Lee Karl