Patents by Inventor Scott D. Schwab
Scott D. Schwab 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: 9249769Abstract: A fuel composition and method for cleaning up internal components of a fuel injector and for improver injector performance for a diesel engine. The composition includes major amount of middle distillate fuel having a sulfur content of 50 ppm by weight or less, and from about 1 to about 30 ppm by weight based on a total weight of fuel of a fuel soluble hydrocarbyl sulfonic acid or salt such as an alkyl aryl sulfonic acid or salt thereof, wherein the alkyl aryl sulfonic acid or salt thereof is effective to improve injector performance.Type: GrantFiled: March 24, 2015Date of Patent: February 2, 2016Assignee: Afton Chemical CorporationInventors: Scott D. Schwab, Xinggao Fang
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Publication number: 20150376524Abstract: A fuel additive composition, fuel composition, method of improving the injector performance of a fuel injected engine, method for preventing or cleaning up deposits in an engine or fuel system, method of reducing wear in a fuel system of an engine, and method of improving the demulsibility of a fuel composition. The fuel composition includes from about 5 to about 300 ppm by weight based on a total weight of the fuel composition of a hydrocarbyl soluble quaternary ammonium carboxylate derived from a quaternary ammonium carbonate and an organic acid.Type: ApplicationFiled: June 25, 2014Publication date: December 31, 2015Inventors: Xinggao FANG, Scott D. SCHWAB, Daniel TAYLOR
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Patent number: 9222046Abstract: A fuel soluble additive for a diesel engine, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for a diesel engine. The fuel soluble additive includes a quaternary ammonium salt derived from an amido amine containing at least one tertiary amino group and an epoxide, in the presence of a proton donor selected from a carboxylic acid and an alkyl phenol. The amido amine is made in a reaction medium that is substantially devoid of an acylating agent.Type: GrantFiled: April 26, 2013Date of Patent: December 29, 2015Assignee: Afton Chemical CorporationInventors: Xinggao Fang, Scott D. Schwab
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Publication number: 20150232774Abstract: In accordance with the disclosure, exemplary embodiments provide a method for improving injector performance, a method for restoring power to a diesel fuel injected engine, and a method of operating a fuel injected diesel engine. The method includes combining a fuel with a reaction product derived from (i) a hydrocarbyl substituted dicarboxylic acid or anhydride, wherein the hydrocarbyl substituent has a number average molecular weight ranging from about 600 to about 800 and (ii) a polyamine includes a compound of the formula H2N—((CHR1—(CH2)n—NH)m—H, wherein R1 is hydrogen, n is 1 and m is 4, wherein a molar ratio of (i) reacted with (ii) ranges from about 1.3:1 to about 1.6:1. The reaction product, as made, contains no more than 3.0 wt. % unreacted polyamine in the reaction product based on active material in the reaction product.Type: ApplicationFiled: February 19, 2014Publication date: August 20, 2015Applicant: AFTON CHEMICAL CORPORATIONInventors: Xinggao FANG, Scott D. SCHWAB
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Patent number: 9017431Abstract: A method for improving performance of fuel injectors, and a method for cleaning fuel injectors for an internal combustion engine. The methods include operating the engine on a fuel composition comprising a major amount of fuel and from about 1 to about 200 ppm by weight based on a total weight of the fuel of a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group and (ii) a halogen substituted C2-C8 carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially devoid of free anion species.Type: GrantFiled: January 16, 2013Date of Patent: April 28, 2015Assignee: Afton Chemical CorporationInventors: Xinggao Fang, Scott D. Schwab
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Patent number: 9011556Abstract: The present disclosure is directed to a middle distillate fuel composition comprising a friction modifying effective amount of a hydrocarbyl-substituted succinimide derived from maleic anhydride, polyisobutylene and ammonia; and a middle distillate fuel. A method for modifying friction in a compression engine comprising providing to the engine the disclosed fuel composition is also disclosed. Moreover, there is disclosed a method for improving fuel mileage.Type: GrantFiled: March 9, 2007Date of Patent: April 21, 2015Assignee: Afton Chemical CorporationInventor: Scott D. Schwab
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Publication number: 20150096528Abstract: A fuel soluble additive for a diesel engine, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for a diesel engine. The fuel soluble additive includes a quaternary ammonium salt derived from the reaction of (a) a hydrocarbyl amine containing at least one tertiary amino group, (b) an epoxide compound selected from a glycidol, a glycidyl ether, glycidyl ester, polyglycidyl ether, a polyglycidyl ester, and combinations thereof, wherein substituents of the glycidyl group have, on average, less than five carbon atoms per hetero atom, and (c) optionally a proton donor.Type: ApplicationFiled: October 8, 2013Publication date: April 9, 2015Applicant: Afton Chemical CorporationInventors: Scott D. SCHWAB, Xinggao FANG
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Publication number: 20150096516Abstract: A fuel additive and its preparation for a engine, a fuel containing the additive, a fuel additive concentrate, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for an engine. The fuel additive includes a quaternary ammonium salt derived from a reaction of a hydrocarbyl substituted anhydride, a tertiary amine and a hydroxyl-containing epoxide, wherein the tertiary amine is devoid of primary and secondary amino groups.Type: ApplicationFiled: October 8, 2013Publication date: April 9, 2015Applicant: Afton Chemical CorporationInventors: Xinngao FANG, Scott D. SCHWAB
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Patent number: 8992636Abstract: A fuel additive and its preparation for a engine, a fuel containing the additive, a fuel additive concentrate, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for an engine. The fuel additive includes a quaternary ammonium salt derived from a reaction of a hydrocarbyl substituted anhydride, a tertiary amine and a hydroxyl-containing epoxide, wherein the tertiary amine is devoid of primary and secondary amino groups.Type: GrantFiled: October 8, 2013Date of Patent: March 31, 2015Assignee: Afton Chemical CorporationInventors: Xinngao Fang, Scott D. Schwab
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Patent number: 8974551Abstract: The disclosure provides a fuel additive concentrate, a method for cleaning fuel injectors, a method for restoring power to a diesel fuel injected engine, a fuel composition, and a method of operating a fuel injected diesel engine. The additive concentrate includes (a) a hydrocarbyl substituted quaternary ammonium internal salt and (b) a hydrocarbyl substituted dicarboxylic anhydride derivative, wherein the hydrocarbyl substituent has a number average molecular weight ranging from about 450 to about 1500. A weight ratio of (a) to (b) in the additive concentrate ranges from about 1:20 to about 2:1, and the additive concentrate is devoid of a reaction product of a hydrocarbyl substituted dicarboxylic acid, anhydride or ester and an amine compound of the formula wherein R2 is hydrogen or a hydrocarbyl group containing from 1 to 15 carbon atoms, and R3 is hydrogen or a hydrocarbyl group containing from 1 to 20 carbon atoms.Type: GrantFiled: February 19, 2014Date of Patent: March 10, 2015Assignee: Afton Chemical CorporationInventors: Xinggao Fang, Scott D. Schwab
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Patent number: 8915977Abstract: A fuel soluble additive for a gasoline engine, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for a gasoline engine. The fuel soluble additive includes a quaternary ammonium salt derived from an amido amine containing at least one tertiary amino group and an epoxide, in the presence of a proton donor selected from a carboxylic acid and an alkyl phenol. The amido amine is made in a reaction medium that is substantially devoid of an acylating agent.Type: GrantFiled: April 26, 2013Date of Patent: December 23, 2014Assignee: Afton Chemical CorporationInventors: Xinggao Fang, Scott D. Schwab
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Patent number: 8894726Abstract: A fuel composition for a fuel injected diesel engine, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for a diesel engine. The fuel composition includes a major amount of fuel and a minor effective amount of a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group and (ii) a halogen substituted C2-C8 carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially devoid of free anion species.Type: GrantFiled: June 13, 2012Date of Patent: November 25, 2014Assignee: Afton Chemical CorporationInventors: Xinggao Fang, Scott D. Schwab
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Publication number: 20140318487Abstract: A fuel soluble additive for a diesel engine, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for a diesel engine. The fuel soluble additive includes a quaternary ammonium salt derived from an amido amine containing at least one tertiary amino group and an epoxide, in the presence of a proton donor selected from a carboxylic acid and an alkyl phenol. The amido amine is made in a reaction medium that is substantially devoid of an acylating agent.Type: ApplicationFiled: April 26, 2013Publication date: October 30, 2014Applicant: Afton Chemical CorporationInventors: Xinggao FANG, Scott D. SCHWAB
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Publication number: 20140318486Abstract: A fuel soluble additive for a gasoline engine, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for a gasoline engine. The fuel soluble additive includes a quaternary ammonium salt derived from an amido amine containing at least one tertiary amino group and an epoxide, in the presence of a proton donor selected from a carboxylic acid and an alkyl phenol. The amido amine is made in a reaction medium that is substantially devoid of an acylating agent.Type: ApplicationFiled: April 26, 2013Publication date: October 30, 2014Applicant: Afton Chemical CorporationInventors: Xinggao FANG, Scott D. SCHWAB
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Patent number: 8863700Abstract: In accordance with the disclosure, exemplary embodiments provide a fuel additive concentrate, a method for cleaning fuel injectors, a method for restoring power to a diesel fuel injected engine, a fuel composition, and a method of operating a fuel injected diesel engine. The additive concentrate includes (a) a hydrocarbyl substituted quaternary ammonium internal salt; and (b) a reaction product of (i) a hydrocarbyl substituted dicarboxylic acid, anhydride, or ester and (ii) an amine compound or salt thereof of the formula wherein R is selected from hydrogen and a hydrocarbyl group containing from about 1 to about 15 carbon atoms, and R1 is selected from hydrogen and a hydrocarbyl group containing from about 1 to about 20 carbon atoms. The reaction product (b) on average has less than 2 amino-triazole groups per molecule. A weight ratio of (a) to (b) in the additive concentrate ranges from about 10:1 to about 1:10.Type: GrantFiled: November 1, 2012Date of Patent: October 21, 2014Assignee: Afton Chemical CorporationInventors: Xinggao Fang, Scott D. Schwab
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Patent number: 8852297Abstract: A method cleaning up internal components of a fuel injector for a diesel engine. The method includes operating a fuel injected diesel engine on a fuel composition that includes a major amount of diesel fuel and from about 5 to about 500 ppm by weight of a reaction product derived from (a) a hydrocarbyl substituted dicarboxylic acid, anhydride, or ester and (b) an amine compound or salt thereof of the formula wherein R is selected from the group consisting of hydrogen and a hydrocarbyl group containing from about 1 to about 15 carbon atoms, and R1 is selected from the group consisting of hydrogen and a hydrocarbyl group containing from about 1 to about 20 carbon atoms. The reaction product is characterized by a particular FTIR spectrum.Type: GrantFiled: April 24, 2012Date of Patent: October 7, 2014Assignee: Afton Chemical CorporationInventors: Xinggao Fang, Scott D. Schwab, Julienne M. Galante-Fox
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Publication number: 20140196678Abstract: A method for improving performance of fuel injectors, and a method for cleaning fuel injectors for an internal combustion engine. The methods include operating the engine on a fuel composition comprising a major amount of fuel and from about 1 to about 200 ppm by weight based on a total weight of the fuel of a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group and (ii) a halogen substituted C2-C8 carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially devoid of free anion species.Type: ApplicationFiled: January 16, 2013Publication date: July 17, 2014Applicant: AFTON CHEMICAL CORPORATIONInventors: Xinggao FANG, Scott D. SCHWAB
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Patent number: 8690968Abstract: The present disclosure is directed to a hydrocarbyl-substituted succinimide lubricity additive or a hydrocarbyl-substituted succinamide lubricity additive for low sulfur diesel fuel. The additive is derived from an olefin having little to no terminal double bonds and a very high proportion of internal double bonds. The succinimide or succinamide is made by combining the alkylated succinic anhydride with ammonia. Also provided is a method for reducing wear scarring in a compression ignition engine comprising providing to the engine a middle distillate fuel comprising an effective amount of the hydrocarbyl-substituted succinimide and/or hydrocarbyl-substituted succinamide. A method for reducing an average coefficient of friction of a middle distillate fuel in a compression ignition engine comprising providing to the engine the disclosed fuel is also disclosed.Type: GrantFiled: April 4, 2008Date of Patent: April 8, 2014Assignee: Afton Chemical CorporationInventor: Scott D. Schwab
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Publication number: 20130333650Abstract: In accordance with the disclosure, exemplary embodiments provide a fuel additive concentrate, a method for cleaning fuel injectors, a method for restoring power to a diesel fuel injected engine, a fuel composition, and a method of operating a fuel injected diesel engine. The additive concentrate includes (a) a hydrocarbyl substituted quaternary ammonium internal salt; and (b) a reaction product of (i) a hydrocarbyl substituted dicarboxylic acid, anhydride, or ester and (ii) an amine compound or salt thereof of the formula wherein R is selected from hydrogen and a hydrocarbyl group containing from about 1 to about 15 carbon atoms, and R1 is selected from hydrogen and a hydrocarbyl group containing from about 1 to about 20 carbon atoms. The reaction product (b) on average has less than 2 amino-triazole groups per molecule. A weight ratio of (a) to (b) in the additive concentrate ranges from about 10:1 to about 1:10.Type: ApplicationFiled: November 1, 2012Publication date: December 19, 2013Applicant: Afton Chemical CorporationInventors: Xinggao FANG, Scott D. SCHWAB
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Publication number: 20130333649Abstract: A fuel composition for a fuel injected diesel engine, a method for improving performance of fuel injectors and a method for cleaning fuel injectors for a diesel engine. The fuel composition includes a major amount of fuel and a minor effective amount of a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group and (ii) a halogen substituted C2-C8 carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially devoid of free anion species.Type: ApplicationFiled: June 13, 2012Publication date: December 19, 2013Applicant: AFTON CHEMICAL CORPORATIONInventors: Xinggao FANG, Scott D. SCHWAB