Patents Represented by Attorney W. W. Brooks
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Patent number: 5481903Abstract: An apparatus for measuring viscoelastic properties of rubbery materials is disclosed. The instrument comprises two opposed dies having temperature and pressure controling means, means for initiating oscillatory rotation of one of the dies whereby the sample is cooled during its residence between the dies and reheated whereby torque measurements are carried out during the period of cooling. A method for operating the claimed apparatus is also disclosed.Type: GrantFiled: November 7, 1994Date of Patent: January 9, 1996Assignee: Monsanto plcInventors: David King, Michael Stolc, David Rusling
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Patent number: 5439614Abstract: Fluid compositions useful to serve as oxidation inhibited functional fluids are provided. Such fluid compositions comprise a colloidal dispersion of an aromatic ether represented by the formula ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3 independently are phenyl, biphenyl, and terphenyl and n is an integer of from zero (0) to 5, and an oxidation inhibiting amount of an alkali metal salt of oxalic acid.Type: GrantFiled: August 30, 1990Date of Patent: August 8, 1995Assignee: Monsanto CompanyInventor: John S. McConaghy, Jr.
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Patent number: 5382629Abstract: Vulcanizable rubber compositions are disclosed which contain co-activator of vulcanization which is a polymeric amine, that is, a hydrocarbon polymer with pendent alkyl amine groups. The co-activators impart increased rates of vulcanization with little decrease in scorch delay and very little increase in the modulus of the cured compositions. No increase in heat build-up or decrease in flex-fatigue life is shown. Typical polymers forming the backbone of the co-activators include EPDM rubber and polymers from butadiene or isoprene, with optional co-monomers.Type: GrantFiled: January 18, 1994Date of Patent: January 17, 1995Assignee: Monsanto CompanyInventors: Aubert Y. Coran, Samuel J. Tremont, Leonard H. Davis, Frederick Ignatz-Hoover, Martin P. McGrath
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Patent number: 5374689Abstract: Thiols, or thiolate salts, disulfides and sulfenamides of certain pyrazines are effective accelerators in the sulfur vulcanization of rubber. These compounds, based on 2-pyrazine, show improved rates of vulcanization compared with known sulfenamide accelerators.Type: GrantFiled: May 4, 1993Date of Patent: December 20, 1994Assignee: Monsanto CompanyInventors: Charles J. Rostek, Jr., Horng-Jau Lin, David J. Sikora
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Patent number: 5364964Abstract: Butanetetracarboxylic acid with acceptably low levels of color-causing contaminants, suitable for permanent press agent use, is prepared in high conversion and yield from tetraalkyl butanetetracarboxylates by a series of steps including purification of precursor material, hydrolysis with high concentration of acid catalyst, and oxidative purification of product.Type: GrantFiled: November 1, 1993Date of Patent: November 15, 1994Assignee: Monsanto CompanyInventors: Eduardo A. Casanova, Dennis J. Kalota
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Patent number: 5298653Abstract: Butanetetracarboxylic acid with acceptably low levels of color-causing contaminants, suitable for permanent press agent use, is prepared in high conversion and yield from tetraalkyl butanetetracarboxylates by a series of steps including purification of precursor material, hydrolysis with high concentration of acid catalyst, and oxidative purification of product.Type: GrantFiled: December 14, 1989Date of Patent: March 29, 1994Assignee: Monsanto CompanyInventors: Eduardo A. Casanova, Dennis J. Kalota
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Patent number: 5275996Abstract: An activated porous phosphorus/vanadium oxide catalyst adapted for the catalytic oxidation of a hydrocarbon to produce a carboxylic acid anhydride. The catalyst comprises shaped bodies having a B.E.T. surface area of at least about 15 m.sup.2 /g, an average vanadium oxidation state of between about 4.0 and about 4.5, a total pore volume of at least about 0.15 cc/g, a normalized apparent shaped body density of between about 1.25 and about 2.0 g/cc, and a crush strength of at least about 4 pounds. At least about 5% of the pore volume of the catalyst is constituted of pores having a diameter of at least about 0.8 microns, and at least about 4% of the pore volume is constituted of pores having a diameter of at least about 10 microns.Type: GrantFiled: May 22, 1992Date of Patent: January 4, 1994Assignee: Monsanto CompanyInventors: William J. Andrews, Jerry R. Ebner, Timothy R. Felthouse
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Patent number: 5248396Abstract: 1,2,3,4-Butanetetracarboxylic acid is prepared by electrohydrodimerization of dialkyl maleates in alkanol to produce tetraalkyl butanetetracarboxylates, followed by hydrolysis of the resultant tetraalkyl butanetetracarboxylates to obtain the butanetetracarboxylic acid product.Type: GrantFiled: December 14, 1989Date of Patent: September 28, 1993Assignee: Monsanto CompanyInventors: Eduardo A. Casanova, Dennis J. Kalota, John H. Wagenknecht
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Patent number: 5244546Abstract: The present invention is directed to a process for preparing tetraalkyl butanetetracarboxylates by electrolytic hydrodimerization of dialkyl maleates in alkanols.Type: GrantFiled: December 14, 1989Date of Patent: September 14, 1993Assignee: Monsanto CompanyInventors: Eduardo A. Casanova, John H. Wagenknecht
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Patent number: 5185455Abstract: An improvement in a process for the manufacture of maleic anhydride by catalytic oxidation of n-butane in the presence of trimethyl phosphate over a fixed bed vanadium phosphorus oxide catalyst in a tubular reactor. The trimethyl phosphate content of the gas entering the reactor within a range of between about (0.9) N and about (1.1) N where N is a normative concentration of trimethyl phosphate in ppm as determined by the following relationship:N+5.times.C.sub.4 +6.times.(H.sub.2 O-2.4)+0.75.times.(CONV-c)+(SV/(25.times.P.sub.in))where:C.sub.4 .times.the mole % of n-butane in the gas entering the reactor;H.sub.2 O.times.the mole % moisture in the gas entering the reactor;CONV.times.% butane conversion in the reactor;SV.times.gas hourly space velocity of the gas at the inlet of the reactor, reduced to one atmosphere pressure and 60.degree. F.;P.sub.in .times.the pressure at the inlet of the reactor (psig); andc.times.84-0.05[(SV.times.C.sub.4)/P.sub.Type: GrantFiled: February 18, 1992Date of Patent: February 9, 1993Assignee: Monsanto CompanyInventor: Jerry R. Ebner
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Patent number: 5120459Abstract: Perfluorinated polyethers having the formulaR.sub.f O--(CF.sub.2 CF.sub.2 O).sub.n --R'.sub.fwherein n is an integer of 1-11 and each of R.sub.f and R'.sub.f is a perfluorinated C.sub.1 -C.sub.5 -alkyl radical, dimers of such polyethers and carbon to carbon intramolecularly coupled cyclic derivatives of such polyethers are produced by direct fluorination of the polyethers in an inert solvent. Compositions of the perfluorinated polyethers and their derivatives are useful as functional fluids.Type: GrantFiled: March 23, 1990Date of Patent: June 9, 1992Assignee: Monsanto CompanyInventors: Dennis J. Kalota, John S. McConaghy, Jr., Paul W. Foerst, Paul H. Liu, Frank R. Feher, Jr.
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Patent number: 4971724Abstract: Processes employing compositions comprising certain amino acids such as aspartic acid, when fully ionized at alkaline pH, effectively inhibit corrosion of ferrous metals in the presence of an aqueous medium. This effect is enhanced with increased fluid velocity.Type: GrantFiled: February 6, 1990Date of Patent: November 20, 1990Assignee: Monsanto CompanyInventors: Dennis J. Kalota, David C. Silverman
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Patent number: 4882132Abstract: Cobalt is reversibly extracted from cobalt bearing aqueous solutions using solvent extraction techniques by contacting the aqueous solution with a hydrocarbon solvent containing a N-alkylakanohydroxamic acid having at least about 8 carbon atoms. A new class of cobalt complexes is also provided.Type: GrantFiled: January 20, 1987Date of Patent: November 21, 1989Assignee: Monsanto CompanyInventors: Bruce F. Monzyk, Arthur R. Henn
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Patent number: 4643662Abstract: An apparatus is provided for pelletizing finely divided particulate or pulverant materials. The apparatus is particularly effective in pelletizing large quantities of such particulate materials to a desirable spheroidal pellet size.Type: GrantFiled: April 23, 1985Date of Patent: February 17, 1987Assignee: Monsanto CompanyInventors: Lawrence F. Rakestraw, Harry M. Stevens
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Patent number: 4628131Abstract: Aromatic compounds are nitrated in the vapor phase via a process comprising contacting the aromatic compounds with a nitrating agent in the presence of a nitration promoting catalyst composition represented by the empirical formula:(M.sup.1.sub.a M.sup.2.sub.b O.sub.c).sub.x (NO.sub.2).sub.ywherein M.sup.1 is at least one element selected from Group 4b of the Periodic Table of the Elements, M.sup.2 is at least one element selected from Group 3b of the Periodic Table of the Elements, a is 1, b is 0 to 20, c is a number taken to satisfy the average valences of M.sup.1 and M.sup.2 in the oxidation states in which they exist in the composition, x is 1, and y is 0 to c.Type: GrantFiled: November 14, 1984Date of Patent: December 9, 1986Assignee: Monsanto CompanyInventor: Ignatius Schumacher
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Patent number: 4528280Abstract: Phosphorus-vanadium mixed oxide catalysts are prepared by contacting a tetravalent vanadium compound, dissolved in an aqueous, non-oxidizing acid medium, with crystalline diphosphoric acid to form a phosphorus-vanadium mixed oxide catalyst precursor. The resulting catalyst precursor-containing solution is subjected to a series of concentration/dilution cycles to induce crystallization of the catalyst precursor. The crystals are collected, dried, formed into desired structures, and calcined at temperatures from about 300.degree. C. to about 600.degree. C.Type: GrantFiled: December 28, 1983Date of Patent: July 9, 1985Assignee: Monsanto CompanyInventor: James T. Wrobleski
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Patent number: 4515973Abstract: Maleic anhydride is produced by the oxidation of a nonaromatic hydrocarbon having at least four carbon atoms in a straight chain with molecular oxygen or a molecular oxygen-containing gas in the vapor phase in the presence of a phosphorus-vanadium mixed oxide catalyst. Such catalysts are prepared by contacting a tetravalent vanadium compound, dissolved in an aqueous, non-oxidizing acid medium, with crystalline diphosphoric acid to form a phosphorus-vanadium mixed oxide catalyst precursor. The resulting catalyst precursor-containing solution is subjected to a series of concentration/dilution cycles to induce crystallization of the catalyst precursor. The crystals are collected, dried, formed into desired structures, and calcined at temperatures from about 300.degree. C. to about 600.degree. C.Type: GrantFiled: December 28, 1983Date of Patent: May 7, 1985Assignee: Monsanto CompanyInventor: James T. Wrobleski
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Patent number: 4456764Abstract: Process for the manufacture of maleic anhydride which comprises contacting in the vapor phase a mixture of butane and molecular oxygen with a catalyst comprising in chemical combination phosphorus, vanadium, oxygen and a catalyst modifier comprising titanium combined with one or more elements selected from the group consisting of aluminum, cerium, cobalt and iron.Type: GrantFiled: September 20, 1982Date of Patent: June 26, 1984Assignee: Monsanto CompanyInventor: James T. Wrobleski
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Patent number: 4407729Abstract: Catalyst compositions are prepared by contacting an alumina-silica-metal oxide combination represented by the formula:(Al.sub.2 O.sub.3).sub.a (SiO.sub.2).sub.b (M.sub.2/n O).sub.cwherein M is a metal cation selected from the group consisting of the lanthanides of rare earths, Groups 1b, 2b, 5b, 6b, 7b, and 8 of the Periodic Table of the Elements, and mixtures thereof, and a, b, and c represent weight percent of the Al.sub.2 O.sub.3, SiO.sub.2, M.sub.2/n O components, respectively, in the alumina-silica-metal oxide combination, with a being 0 to 100, b being O to 100, and c being 0 to 50, and n represents an integer from 1 to 7 of the valence of the metal cation, with the proviso that the sum of a+b) must be greater than 0, with a catalytically effective amount of sulfur trioxide.Type: GrantFiled: October 21, 1981Date of Patent: October 4, 1983Assignee: Monsanto CompanyInventors: Ignatius Schumacher, Kang-Bo Wang
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Patent number: D306266Type: GrantFiled: June 13, 1986Date of Patent: February 27, 1990Inventors: Barry C. Hargrove, James D. Madden