Patents by Inventor Jon L. Howell
Jon L. Howell 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: 7420074Abstract: A process to prepare substituted aryl pnictogen derivatives comprising contacting a fluoropolyether or fluoroalkyl primary bromide or iodide, with a pnictogen derivative such as triaryl phosphine, triaryl arsine, or triaryl stibine or triaryl phosphine oxide, triaryl arsine oxide or triaryl stibine oxide, to produce the corresponding fluoropolyether- or fluoroalkyl- substituted aryl phosphine oxide, aryl arsine oxide or aryl stibine oxide; and optionally, contacting the oxide product with a reducing agent to form the corresponding substituted aryl phosphine, arsine or stibine.Type: GrantFiled: December 22, 2006Date of Patent: September 2, 2008Assignee: E.I. du Pont de Nemours and CompanyInventors: Jon L. Howell, Kevin Anthony Hay
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Patent number: 7396948Abstract: A process to prepare substituted aryl pnictogen derivatives comprising contacting a fluoropolyether or fluoroalkyl primary bromide or iodide, with a pnictogen derivative such as triaryl phosphine, triaryl arsine, or triaryl stibine or triaryl phosphine oxide, triaryl arsine oxide or triaryl stibine oxide, to produce the corresponding fluoropolyether- or fluoroalkyl-substituted aryl phosphine oxide, aryl arsine oxide or aryl stibine oxide; and optionally, contacting the oxide product with a reducing agent to form the corresponding substituted aryl phosphine, arsine or stibine.Type: GrantFiled: December 22, 2006Date of Patent: July 8, 2008Assignee: E.I. du Pont de Nemours and CompanyInventors: Jon L. Howell, Kevin Anthony Hay
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Patent number: 7340834Abstract: A method of lubricating a wave bearing comprising application of an oil comprising a perfluoropolyether, derivatized perfluoropolyether, fluorosilicone, polychlorotrifluoroether, or polyphenyl ether, wherein the oil is capable of sustaining temperatures greater than 121° C., and at an operating speed of up to 1.4 million DN without decomposition.Type: GrantFiled: July 29, 2004Date of Patent: March 11, 2008Assignee: E.I. du Pont de Nemours and CompanyInventors: Jon L. Howell, Gregory Alan Bell
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Patent number: 7232932Abstract: A perfluoropolyether, a composition comprising the perfluoropolyether, a process for producing the perfluoropolyether, and a process for improving the thermostability of grease or lubricant are provided. The perfluoropolyether comprises perfluoroalkyl radical end groups in which the radical has at least 3 carbon atoms per radical and is substantially free of perfluoromethyl and perfluoroethyl end groups. The process for producing the perfluoropolyether can comprise (1) contacting a perfluoro acid halide, a C2-to C4-substituted ethyl epoxide, or a C3+ fluoroketone with a metal halide to produce an alkoxide; (2) contacting the alkoxide with either hexafluoropropylene oxide or tetrafluorooxetane to produce a second acid halide; (3) esterifying the second acid halide to an ester; (4) reducing the ester to its corresponding alcohol; (5) converting the alcohol with a base to a salt form; (6) contacting the salt form with a C3 or higher olefin to produce a fluoropolyether; and (7) fluorinating the fluoropolyether.Type: GrantFiled: March 30, 2004Date of Patent: June 19, 2007Assignee: E. I. du Pont de Nemours and CompanyInventors: Jon L. Howell, Erik William Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher
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Patent number: 7148385Abstract: A perfluoropolyether and a composition comprising the perfluoropolyether are provided in which the perfluoropolyether comprises at least one bromine or iodine atom at the primary position of the perfluoropolyether. Also provided is a process for producing the composition in which the process comprises contacting a perfluoropolyether acid fluoride moiety with a metal bromide or metal iodide or a suitable polyether secondary iodide under a condition sufficient to effect the production of a perfluoropolyether comprising at least one bromine or iodine at the primary position.Type: GrantFiled: July 25, 2003Date of Patent: December 12, 2006Assignee: E. I. du Pont de Nemours and CompanyInventors: Jon L. Howell, Erik W. Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher, Ireneusz Nowak
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Publication number: 20040186211Abstract: A perfluoropolyether, a composition comprising the perfluoropolyether, a process for producing the perfluoropolyether, and a process for improving the thermostability of grease or lubricant are provided. The perfluoropolyether comprises perfluoroalkyl radical end groups in which the radical has at least 3 carbon atoms per radical and is substantially free of perfluoromethyl and perfluoroethyl end groups.Type: ApplicationFiled: March 30, 2004Publication date: September 23, 2004Inventors: Jon L. Howell, Erik W. Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher
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Patent number: 6753301Abstract: A perfluoropolyether, a composition comprising the perfluoropolyether, a process for producing the perfluoropolyether, and a process for improving the thermostability of grease or lubricant are provided. The perfluoropolyether comprises perfluoroalkyl radical end groups in which the radical has at least 3 carbon atoms per radical and is substantially free of perfluoromethyl and perfluoroethyl end groups.Type: GrantFiled: July 10, 2001Date of Patent: June 22, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Jon L. Howell, Erik William Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher
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Publication number: 20040024250Abstract: A perfluoropolyether and a composition comprising the perfluoropolyether are provided in which the perfluoropolyether comprises at least one bromine or iodine atom at the primary position of the perfluoropolyether. Also provided is a process for producing the composition in which the process comprises contacting a perfluoropolyether acid fluoride moiety with a metal bromide or metal iodide or a suitable polyether secondary iodide under a condition sufficient to effect the production of a perfluoropolyether comprising at least one bromine or iodine at the primary position.Type: ApplicationFiled: July 25, 2003Publication date: February 5, 2004Inventors: Jon L. Howell, Erik W. Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher, Ireneusz Nowak
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Patent number: 6653511Abstract: A perfluoropolyether and a composition comprising the perfluoropolyether are provided in which the perfluoropolyether comprises at least one bromine or iodine atom at the primary position of the perfluoropolyether. Also provided is a process for producing the composition in which the process comprises contacting a perfluoropolyether acid fluoride moiety with a metal bromide or metal iodide or a suitable polyether secondary iodide under a condition sufficient to effect the production of a perfluoropolyether comprising at least one bromine or iodine at the primary position.Type: GrantFiled: September 9, 2002Date of Patent: November 25, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Jon L. Howell, Erik W. Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher, Ireneusz Nowak
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Patent number: 6528457Abstract: A composition that can be used as lubricant for high electric field including spark plug boots is disclosed. The composition comprises, or is produced by combining, a halogenated oil such as a perfluoropolyether, a polytrichlorofluoroethylene, a fluorosilicone, or combinations of two or more thereof; a basic thickener; and optionally an additional thickener in which the basic thickener is a metal hydroxide, a metal salt, an ammonium salt, or combinations of two or more thereof. The optional additional thickener is polytetrafluoroethylene, talc, silica, clay, boron nitride, metal soaps, titanium dioxide, polydimethylsiloxane, polyurea, polyurethane, or combinations of two or more thereof. Also provided is a spark plug boot that comprises the composition applied thereto.Type: GrantFiled: June 28, 2001Date of Patent: March 4, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Jon L. Howell, H. Carl Walther, Gregory A. Bell
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Publication number: 20030027732Abstract: A perfluoropolyether, a composition comprising the perfluoropolyether, a process for producing the perfluoropolyether, and a process for improving the thermostability of grease or lubricant are provided. The perfluoropolyether comprises perfluoroalkyl radical end groups in which the radical has at least 3 carbon atoms per radical and is substantially free of perfluoromethyl and perfluoroethyl end groups.Type: ApplicationFiled: July 10, 2001Publication date: February 6, 2003Inventors: Jon L. Howell, Erik William Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher
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Publication number: 20030013924Abstract: A perfluoropolyether and a composition comprising the perfluoropolyether are provided in which the perfluoropolyether comprises at least one bromine or iodine atom at the primary position of the perfluoropolyether. Also provided is a process for producing the composition in which the process comprises contacting a perfluoropolyether acid fluoride moiety with a metal bromide or metal iodide or a suitable polyether secondary iodide under a condition sufficient to effect the production of a perfluoropolyether comprising at least one bromine or iodine at the primary position.Type: ApplicationFiled: September 9, 2002Publication date: January 16, 2003Inventors: Jon L. Howell, Erik W. Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher, Ireneusz Nowak
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Publication number: 20030013922Abstract: A perfluoropolyether and a composition comprising the perfluoropolyether are provided in which the perfluoropolyether comprises at least one bromine or iodine atom at the primary position of the perfluoropolyether. Also provided is a process for producing the composition in which the process comprises contacting a perfluoropolyether acid fluoride moiety with a metal bromide or metal iodide or a suitable polyether secondary iodide under a condition sufficient to effect the production of a perfluoropolyether comprising at least one bromine or iodine at the primary position.Type: ApplicationFiled: July 10, 2001Publication date: January 16, 2003Inventors: Jon L. Howell, Erik William Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher, Ireneusz Nowark
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Publication number: 20030013617Abstract: A composition that can be used as lubricant for high electric field including spark plug boots is disclosed. The composition comprises, or is produced by combining, a halogenated oil such as a perfluoropolyether, a polytrichlorofluoroethylene, a fluorosilicone, or combinations of two or more thereof; a basic thickener; and optionally an additional thickener in which the basic thickener is a metal hydroxide, a metal salt, an ammonium salt, or combinations of two or more thereof. The optional additional thickener is polytetrafluoroethylene, talc, silica, clay, boron nitride, metal soaps, titanium dioxide, polydimethylsiloxane, polyurea, polyurethane, or combinations of two or more thereof. Also provided is a spark plug boot that comprises the composition applied thereto.Type: ApplicationFiled: June 28, 2001Publication date: January 16, 2003Inventors: Jon L. Howell, H. Carl Walther, Gregory A. Bell
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Patent number: 6184187Abstract: Novel phosphorus compounds are effective corrosion inhibitors for perfluoropolyether lubricating oils and greases, and hydraulic fluids.Type: GrantFiled: April 7, 1998Date of Patent: February 6, 2001Assignee: E. I. duPont de Nemours and CompanyInventors: Jon L. Howell, Michael A. Hofman
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Patent number: 5100639Abstract: A process for manufacturing high purity anhydrous hydrogen fluoride (HF) having low levels of oxidizable impurities by electrolytically oxidizing the impurities. Specifically, trivalent arsenic impurity in the anhydrous hydrogen fluoride is oxidized to a non-volatile pentavalent arsenic compound. The resultant mixture is distilled to recover high purity anhydrous hydrogen fluoride with low levels of arsenic impurity.Type: GrantFiled: February 22, 1991Date of Patent: March 31, 1992Assignee: E. I. du Pont de Nemours and CompanyInventors: Francisco J. Freire, Jon L. Howell, Kaye L. Motz, Craig T. Barker, William C. Ziegenhain, Eileen G. Edwards