Patents by Inventor P. J. Thomas
P. J. Thomas 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).
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Patent number: 7745652Abstract: Integrated processes of preparing industrial chemicals starting from seed oil feedstock compositions containing one or more unsaturated fatty acids or unsaturated fatty acid esters, which are essentially free of metathesis catalyst poisons, particularly hydroperoxides; metathesis of the feedstock composition with a lower olefin, such as ethylene, to form a reduced chain olefin, preferably, a reduced chain ?-olefin, and a reduced chain unsaturated acid or ester, preferably, a reduced chain ?,?-unsaturated acid or ester. The reduced chain unsaturated acid or ester may be (trans)esterified to form a polyester polyolefin, which may be epoxidized to form a polyester polyepoxide. The reduced chain unsaturated acid or ester may be hydroformylated with reduction to produce an ?,?-hydroxy acid or ?,?-hydroxy ester, which may be (trans)esterified with a polyol to form an ?,?-polyester polyol.Type: GrantFiled: December 5, 2008Date of Patent: June 29, 2010Assignee: Dow Global Technologies Inc.Inventors: Zenon Lysenko, Bob R. Maughon, Jozef Bicerano, Kenneth A. Burdett, Christopher P. Christenson, Clark H. Cummins, Marvin L. Dettloff, Alan K. Schrock, P. J. Thomas, Richard D. Varjian, Jerry E. White, John Michael Maher
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Publication number: 20090143544Abstract: Integrated processes of preparing industrial chemicals starting from seed oil feedstock compositions containing one or more unsaturated fatty acids or unsaturated fatty acid esters, which are essentially free of metathesis catalyst poisons, particularly hydroperoxides; metathesis of the feedstock composition with a lower olefin, such as ethylene, to form a reduced chain olefin, preferably, a reduced chain ?-olefin, and a reduced chain unsaturated acid or ester, preferably, a reduced chain ?,?-unsaturated acid or ester. The reduced chain unsaturated acid or ester may be (trans)esterified to form a polyester polyolefin, which may be epoxidized to form a polyester polyepoxide. The reduced chain unsaturated acid or ester may be hydroformylated with reduction to produce an ?,?-hydroxy acid or ?,?-hydroxy ester, which may be (trans)esterified with a polyol to form an ?,?polyester polyol.Type: ApplicationFiled: December 5, 2008Publication date: June 4, 2009Applicant: Dow Global Technologies Inc.Inventors: Zenon Lysenko, Bob R. Maughon, Jozef Bicerano, Kenneth A. Burdett, Christopher P. Christenson, Clark H. Cummins, Marvin L. Dettloff, Alan K. Schrock, P. J. Thomas, Richard D. Varjian, Jerry E. White, John Michael Maher
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Publication number: 20050154221Abstract: Integrated processes of preparing industrial chemicals starting from seed oil feedstock compositions containing one or more unsaturated fatty acids or unsaturated fatty acid esters, which are essentially free of metathesis catalyst poisons, particularly hydroperoxides; metathesis of the feedstock composition with a lower olefin, such as ethylene, to form a reduced chain olefin, preferably, a reduced chain ?-olefin, and a reduced chain unsaturated acid or ester, preferably, a reduced chain ?,?-unsaturated acid or ester. The reduced chain unsaturated acid or ester may be (trans)esterified to form a polyester polyolefin, which may be epoxidized to form a polyester polyepoxide. The reduced chain unsaturated acid or ester may be hydroformylated with reduction to produce an ?,?-hydroxy acid or ?,?-hydroxy ester, which may be (trans)esterified with a polyol to form an ?,?polyester polyol.Type: ApplicationFiled: April 17, 2003Publication date: July 14, 2005Inventors: Zenon Lysenko, Bob Maughon, Josef Bicerano, Kenneth Burdett, Christopher Christenson, Clark Cummins, Marvin Dettloff, Alan Schrock, P. J. Thomas, Richard Varjian, Jerry White, John Maher
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Patent number: 6008419Abstract: A 2,3-dihalopropanol is made by reacting 2,3-dihalopropanal with molecular hydrogen in the presence of a transition metal-containing catalyst, under conditions such that 2,3-dihalopropanol is formed. The reaction is particularly useful, for example, as Step (3) in a process to make epihalohydrin which may be generally prepared by:(1) reacting a 3-carbon hydrocarbon with an oxidizing agent to form acrolein;(2) reacting acrolein with a molecular halogen to form 2,3-dihalopropanal;(3) reducing 2,3-dihalopropanal with molecular hydrogen to form 2,3-dihalopropanol; and(4) cyclizing 2,3-dihalopropanol to make epihalohydrin.The process produces epihalohydrin using only about one mole of halogen per mole of epihalohydrin. It also uses substantially less water than existing processes.Type: GrantFiled: December 19, 1997Date of Patent: December 28, 1999Assignee: The Dow Chemical CompanyInventors: P. J. Thomas, R. Garth Pews, Paul C. Vosejpka, George J. Frycek
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Patent number: 5744655Abstract: A 2,3-dihalopropanol is made by reacting 2,3-dihalopropanal with a hydrogenating agent in the presence of a transition metal-containing catalyst, under conditions such that 2,3-dihalopropanol is formed. The reaction is particularly useful as Step (3) in a process to make epihalohydrin by:(1) reacting a 3-carbon hydrocarbon with an oxidizing agent to form acrolein;(2) reacting acrolein with a molecular halogen to form 2,3-dihalopropanal;(3) reducing 2,3-dihalopropanal to form 2,3-dihalopropanol; and(4) cyclizing 2,3-dihalopropanol to make epihalohydrin.The process produces epihalohydrin using only about one mole of halogen per mole of epihalohydrin. It also uses substantially less water than existing processes.Type: GrantFiled: June 19, 1996Date of Patent: April 28, 1998Assignee: The Dow Chemical CompanyInventors: P. J. Thomas, R. Garth Pews, Paul C. Vosejpka, George J. Frycek
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Patent number: 5354929Abstract: The invention is a bis-BCB compound of the structure: ##STR1## a method for making same and polymers made therefrom. The novel compounds of this invention are useful in preparing polymers that can form thin film coatings for multichip midules (MCMs) and integrated circuits (ICs). These compounds can be isolated as liquids at room temperature, and can form polymers that are hydrophobic and have low dielectrical and dissipative properties.Type: GrantFiled: September 28, 1993Date of Patent: October 11, 1994Assignee: The Dow Chemical CompanyInventors: Robert A. Kirchhoff, P. J. Thomas, R. Garth Pews
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Patent number: 5349095Abstract: A process for preparing a substituted or unsubstituted 3- or 4-hydroxyalkylbenzocyclobutene compound comprises reducing a corresponding 3- or 4-formyl or ketobenzocyclobutene compound with a hydride at a temperature below that at which dimerization or oligomerization of the formyl- or ketobenzocycloutene compound or the thus-produced hydroxyalkylbenzocyclobutene compound is a significant side reaction, for a time sufficient to convert the formyl- or ketobenzocyclobutene compound to the hydroxyalkylbenzocyclobutene compound. In a two-step process, formylbenzocyclobutenes are prepared from bromobenzocyclobutenes in 90% yield or from benzocyclobutenes in a 70% yield, and then converted to hydroxymethylbenzocyclobutenes for an overall yield of about 85% from a bromobenzocyclobutene or of about 65% from a benzocyclobutene.Type: GrantFiled: November 25, 1992Date of Patent: September 20, 1994Assignee: The Dow Chemical CompanyInventors: P. J. Thomas, R. Garth Pews
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Patent number: 5336418Abstract: A system for cleaning contaminated fuel in a fuel tank by introducing a suction line to substantially the lowermost part of the tank for suctioning off free water and heavy contaminants settled in the tank. The materials are then routed via suction to a first strainer, where free water and contaminants are trapped and retrieved. The filtrate then moves to a separation vessel, whereby the fuel is filtered through a primary filter medium, and the contaminants settle to the bottom of the vessel and are collected. The filtered fuel is then routed to a tertiary filter before being returned to the fuel tank to agitate the contaminants and facilitate this removal by the suction side of the system. This closed loop process is continued until the filtered fuel is substantially free of contaminants.Type: GrantFiled: November 3, 1992Date of Patent: August 9, 1994Inventor: P. J. Thomas Rawlins
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Patent number: 5264613Abstract: A process for preparing carboxylic acid esters of of the formulaX--(COOCH.sub.2 A).sub.nwherein A is the residue of a substituted or unsubstituted 3- or 4-benzocyclobutene compound, X is an n-valent organic bridging group, and n is 2,3, or 4, comprises reacting a substituted or unsubstituted 3- or 4-hydroxymethylbenzocyclobutene compound with a compound of the formula X--(COY).sub.n, wherein X is an n-valent organic bridging group and Y is Cl or Br. Esters of inorganic acids of the formulaX'(OCH.sub.2 A).sub.nwherein X' is a residue of an inorganic acid halide, n is 2 or 3, and A is the residue of a substituted or unsubstituted 3- or 4-benzocyclobutene compound, are prepared by reacting an inorganic halide of the formula X'Y.sub.n, wherein Y is Br or Cl, with a substituted or unsubstituted 3- or 4-hydroxymethylbenzocyclobutene compound. Biscarbonates of the formula X"[OC(.dbd.O)CH.sub.2 A].sub.Type: GrantFiled: April 10, 1992Date of Patent: November 23, 1993Assignee: The Dow Chemical CompanyInventors: P. J. Thomas, R. Garth Pews
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Patent number: 5210339Abstract: An improved process for the nitration of a substituted or unsubstituted benzocyclobutene compound in a reaction mixture comprising a nitrating agent, an unhalogenated carboxylic acid anhydride, clay and a solvent to produce a corresponding nitrobenzocyclobutene compound, is that wherein:(a) the solvent has a density above that of the nitrating agent or an extractable precursor thereof;(b) the reaction mixture is heated at a temperature such that solvent is removed from the reaction mixture to a site outside the reaction mixture to extract nitrating agent or extractable precursor thereof; and(c) the thus-extracted nitrating agent or precursor thereof is fed into the reaction mixture to nitrate the benzocyclobutene compound.Type: GrantFiled: April 15, 1992Date of Patent: May 11, 1993Assignee: The Dow Chemical CompanyInventors: P. J. Thomas, R. Garth Pews
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Patent number: 5120884Abstract: Hydroxy arylcyclobutenes are prepared by the Baeyer-Villiger oxidation of arylcyclobutene aldehydes with permonophosphoric acid.Type: GrantFiled: February 14, 1991Date of Patent: June 9, 1992Assignee: The Dow Chemical CompanyInventors: P. J. Thomas, R. Garth Pews
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Patent number: 5099083Abstract: 3-chloromethylbenzocyclobutene is prepared by reacting benzocyclobutene with chloromethyl methyl ether in the presence of stannic chloride at a temperature of about -120.degree. C. to about -40.degree. C. and neutralizing the resulting reaction mixture comprising 3-chloromethylbenzocyclobutene at a temperature of about -80.degree. C. to about -70.degree. C.Type: GrantFiled: February 14, 1991Date of Patent: March 24, 1992Assignee: The Dow Chemical CompanyInventors: P. J. Thomas, R. Garth Pews
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Patent number: 4840732Abstract: The fuel cleaning system of the present invention includes removal of water and sludge which is accomplished using a gravity separator with a mist extracting means utilizing a large commercial cartridge type filter. The filter removes particles larger than 20 microns plus any water that was not removed in the gravity separator. Clean fuel from the filter is discharged at the bottom of the fuel tank at high velocity through a small opening. This agitates the water and sludge. The suction side of the system is located approximately one inch above the high velocity discharge where it picks up the water and sludge for removal by the separator and filter sections. During the process, water and sludge are drained from the separator and filter as accummulated. The system is powered by an explosion-proof electric motor driving a pump which handles approximately 5 gallons per minute.Type: GrantFiled: August 25, 1988Date of Patent: June 20, 1989Inventor: P. J. Thomas Rawlins
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Patent number: 4772401Abstract: The fuel cleaning system of the present invention includes removal of water and sludge which is accomplished using a gravity separator with a mist extracting means utilizing a large commercial cartridge type filter. The filter removes particles larger than 20 microns plus any water that was not removed in the gravity separator. Clean fuel from the filter is discharged at the bottom of the fuel tank at high velocity through a small opening. This agitates the water and sludge. The suction side of the system is located approximately one inch above the high velocity discharge where it picks up the water and sludge for removal by the separator and filter sections. During the process, water and sludge are drained from the separator and filter as accumulated. The system is powered by an explosion-proof electric motor driving a pump which handles approximately 5 gallons per minute.Type: GrantFiled: August 21, 1986Date of Patent: September 20, 1988Inventor: P. J. Thomas Rawlins