Patents Represented by Attorney Thomas L. Farquer

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  • Method for increasing fluosilicic acid recovered from wet process phosphoric acid production
    Patent number: 4762698
    Abstract: A method is disclosed for increasing the fluosilicic acid (FSA) recovered from a wet process phosphoric acid manufacturing process. The filtrate obtained by washing a filter cake is pumped to a stripper and reacted with H.sub.2 SO.sub.4 to converting the dissolved FSA to gaseous SiF.sub.4. A defoamer is added to the acid-filtrate mixture to reduce the foam produced by the reaction and increase the amount of gaseous SiF.sub.4 recovered from the reaction. The gaseous SiF.sub.4 is recovered from the acid-filtrate reaction mixture and converted to FSA for commercial use.
    Type: Grant
    Filed: May 7, 1987
    Date of Patent: August 9, 1988
    Assignee: International Minerals & Chemical Corp.
    Inventors: J. Jay Yarnell, Craig A. Pflaum, Arthur F. Davidson, Harry J. Kuhn
  • Sustained release implant and method for preparing same
    Patent number: 4761289
    Abstract: A mixture comprising a dispersion of a water-diffusible solid in a solution of a non-aqueous solvent and a substantially water-insoluble polymer is formed. The non-aqueous solvent is removed from the mixture to substantially dry the mixture, and the substantially dry mixture is comminuted to form particles. A plurality of the particles are formed under pressure to produce a pellet suitable for use as a sustained release implant device.
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: August 2, 1988
    Assignee: International Minerals & Chemical Corp.
    Inventors: Mohamad D. Shalati, Ravi Viswanathan
  • Anti-corrosive protective coatings
    Patent number: 4758281
    Abstract: An anti-corrosion coating and pigment therefore, the latter comprising the combination of condensed aluminum phosphate with a comminuted zeolite or silica and process for the preparation thereof.
    Type: Grant
    Filed: September 12, 1986
    Date of Patent: July 19, 1988
    Assignee: International Minerals & Chemical Corp.
    Inventors: Paul E. Eckler, Louis W. Ferrara, Larry A. Fellows
  • 6' Carbonate esters of zearalanol and its derivatives
    Patent number: 4751239
    Abstract: 6' carbonate esters of zearalanol and its derivatives are used to promote growth in ruminants. The compounds have the structural formula: ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, are H, X, or COX, where X is an alkyl group having from 1-6 carbon atoms; and R is an alkyl group or a Br or Cl substituted alkyl group having from 1-12 carbon atoms.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: June 14, 1988
    Assignee: International Minerals & Chemical Corp.
    Inventor: Edward B. Hodge
  • Anti-corrosive protective coatings
    Patent number: 4738720
    Abstract: A corrosion inhibiting pigment consisting essentially of a comminuted natural zeolite or a calcium-exchanged zeolite.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: April 19, 1988
    Assignee: International Minerals & Chemical Corp.
    Inventors: Paul E. Eckler, Louis M. Ferrara
  • Flotation process for recovery of phosphate values from ore
    Patent number: 4737273
    Abstract: A process for recovering phosphate values from silica-containing phosphate ores is provided. The ore has a particle size in the range of about 0.6 to 1.2 mm and is subjected to selective flotation in the presence of a cationic flotation reagent comprising a di(hydrophobic group) quaternary ammonium salt, wherein each of the hydrophobic groups contain 6 or more carbon atoms and at least one of the groups contains from about 10-20 carbon atoms, in combination with a hydrocarbon oil and a phosphate depressing agent.
    Type: Grant
    Filed: January 3, 1986
    Date of Patent: April 12, 1988
    Assignee: International Minerals & Chemical Corp.
    Inventor: Robert E. Snow
  • Corrosion inhibitors
    Patent number: 4726914
    Abstract: A corrosion inhibitor for mild steel comprising the combination of trimethylolethane or trimethylolpropane with a disclosed alkanolamine.
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: February 23, 1988
    Assignee: International Minerals & Chemical Corp.
    Inventors: Larry A. Fellows, Paul E. Eckler
  • Collecting agents for use in the froth flotation of silica-containing ores
    Patent number: 4725351
    Abstract: A new froth flotation collecting agent and an improved flotation process for beneficiating silica-containing ores, particularly phosphate ores, are provided. In the process, silica particles are selectively separated, by froth flotation, as a froth phase from mineral particles, particularly phosphate particles, remaining in an aqueous concentrate phase in the presence of a silica-activating ion and a mixed collecting agent containing an anionic collector and a cationic collector.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: February 16, 1988
    Assignee: International Minerals & Chemical Corp.
    Inventor: Vikram P. Mehrotra
  • Method of preventing precipitation of metal compounds
    Patent number: 4724083
    Abstract: A method for inhibiting the precipitation under alkaline conditions of metal compounds from a solution containing them by the step of adding dimethylolpropionic acid in metal precipitation-inhibiting amounts.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: February 9, 1988
    Assignee: International Minerals & Chemical Corp.
    Inventor: Paul E. Eckler
  • Progesterone assay method for mammals and monoclonal antibody therefor
    Patent number: 4720455
    Abstract: A progesterone concentration level test for mammalian body fluids particularly adapted for milk whereby estrus and pregnancy can be determined. The test can be carried out with a kit of several reagents, test tubes and a dip-stick carrying an anti-progesterone monoclonal antibody.
    Type: Grant
    Filed: September 6, 1985
    Date of Patent: January 19, 1988
    Assignee: Pitman-Moore, Inc.
    Inventors: Uma M. Babu, Abdus S. Mia, Gregory D. Pancari
  • Defluorination kiln restriction control agent and method
    Patent number: 4716026
    Abstract: An improved process for the thermal defluorination of phosphate rock is provided. The process comprises adding ammonia to the phosphoric acid fed to the kiln, the amount of ammonia added being effective for forming a eutectic with the fused ring and ball materials and heating the mixture with agitation to defluorinating temperatures for a period of time sufficient to defluorinate the rock and recovering the defluorinated rock.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: December 29, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventors: James R. Gruber, Ernest A. Gudath, Dennis H. Michalski, Robert R. Riddle, Regis R. Stana
  • Crystallization-inhibited trimethylolethane solutions
    Patent number: 4709104
    Abstract: Crystallization of trimethylolethane from supersaturated aqueous solutions is inhibited in the presence of effective amounts of crystallization inhibitors selected from methanol, isopropanol, s-butyl alcohol, t-butyl alcohol, 2-ethoxyethanol, 2-methoxyethanol, 1-methoxy-2-propanol, formic acid and 1-dimethylamino-2-propanol.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: November 24, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventor: Paul E. Eckler
  • Isolation of bioactive, monomeric growth hormone
    Patent number: 4705848
    Abstract: Monomeric, biologically active growth hormone is isolated from microbially-produced insoluble inclusion bodies by solubilizing and denaturing the growth hormone by extraction of the inclusion bodies into a guanidine salt solution such as guanidine hydrochloride and subsequently renaturing at least a portion of the growth hormone in the solution by replacing the guanidine salt solution with a denaturant-free buffer solution and removing precipitated impurities and growth hormone aggregates. The renatured growth hromone is then purified by ion-exchange chromatography.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: November 10, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventors: Ren-Der Yang, Edwin J. Hamilton, Jr., Larry D. Taber
  • Apparatus for separating foreign bodies from granular feeds
    Patent number: 4699275
    Abstract: An apparatus for separating larger foreign bodies from a granular feed including a conveyor for moving a mixture of the larger foreign bodies and the granular feed, is provided. The apparatus comprises a wheel having an axis of rotation, a circumference and a plurality of outwardly extending resilient fingers, preferably projecting at a trailing angle from the circumference. The wheel is mounted so that its plane forms an angle with respect to the direction of travel of the conveyor. The wheel is positioned so that the conveyed mixture contacts and pushes the fingers causing the wheel to rotate and the fingers to rake the larger foreign bodies from the mixture.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: October 13, 1987
    Assignee: International Minerals & Chem. Corp.
    Inventor: David W. Holsonbake
  • Phthalamide derivatives with anthelmintic activity
    Patent number: 4694016
    Abstract: Novel phthalamide compounds are disclosed having activity against a broad spectrum of parasitic worms and showing no toxicity to the host animal. These compounds are N-(3-chloro-4,5-dihydroisoxazol-4-yl)-N'-(substituted)phthalamides. A process for making these compounds and a method of administering them to animals are also disclosed.
    Type: Grant
    Filed: October 18, 1985
    Date of Patent: September 15, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventors: Jing-Jong Lu, Herbert L. Wehrmeister
  • Bacitracin-metal-polyether antibiotic complexes
    Patent number: 4693992
    Abstract: Antibiotic-metal complexes contain bacitracin, a non-toxic, complex-forming metal and a polyether antibiotic are disclosed. The complexes are useful (1) for promoting growth in poultry and mammals, (2) for controlling swine dysentery, (3) modifying rumen fluid by decreasing the acetate to propionate (A/P) ratio, (4) controlling coccidiosis in birds, and (5) purifying bacitracin or a bacitracin-metal salt.
    Type: Grant
    Filed: August 26, 1985
    Date of Patent: September 15, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventor: Vernon V. Young
  • Halogenated resorcylic acid lactone derivatives
    Patent number: 4690948
    Abstract: Ring opened halogenated Resorcyclic Acid Lactone (RAL) derivatives having the structure: ##STR1## are used to increase rumen fermentation efficiency.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: September 1, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventor: Jing-Jong Lu
  • Pentaerythritol slurries
    Patent number: 4689173
    Abstract: Slurries of pentaerythritol in a liquid oil in which pentaerythritol is substantially insoluble are disclosed. The slurries can contain up to 70 percent by weight or more of solid pentaerythritol. Suitable oils include propylene glycol, ethylene glycol, vegetable oils, glycerin and tall oil fatty acid. The slurries are stable and flowable allowing for shipment in bulk.
    Type: Grant
    Filed: June 10, 1986
    Date of Patent: August 25, 1987
    Assignee: International Minerals & Chemical Corporation
    Inventor: Paul E. Eckler
  • Air drying protective coatings
    Patent number: 4689266
    Abstract: An ester represented by the formula (A-B).sub.n -C-D.sub.m where A is a branched-chain aliphatic alcohol, a cyclic alcohol or a glycol monoether thereof; B is an unsaturated dibasic acid or a substance which forms an unsaturated dibasic acid when heated; C is a polyol of at least 3 hydroxyl groups; D is an unsaturated fatty acid of from 18 to 22 carbon atoms; n and m are integers of 1 or more but n+m does not exceed the number of hydroxyls present in the C- compound.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: August 25, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventor: Paul E. Eckler
  • Waste liquor disposal methods
    Patent number: 4676912
    Abstract: Waste liquors from fermentation processes and other sources are disposed of by creating an oil-in-water emulsion and incinerating the emulsion.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: June 30, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventor: Paul E. Eckler