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).

  • Publication number: 20230203394
    Abstract: The present disclosure provides fuel additives including quaternary ammonium salt mixtures, fuel compositions including such additives, and methods of improving performance of fuel injector using such additives.
    Type: Application
    Filed: February 24, 2022
    Publication date: June 29, 2023
    Inventor: Scott D. Schwab
  • Publication number: 20230077913
    Abstract: The present disclosure provides fuel additives including Mannich-based quaternary ammonium salt additives, fuel compositions including such additives, and Methods of improving performance of fuel injector using such additives.
    Type: Application
    Filed: August 25, 2021
    Publication date: March 16, 2023
    Inventors: Scott D. Schwab, Geeta Vadehra, Michel Nuckols
  • Publication number: 20230080086
    Abstract: The present disclosure provides fuel additives including Mannich-based quaternary ammonium salt additives, fuel compositions including such additives, and Mehtods of improving performance of fuel injector using such additives.
    Type: Application
    Filed: August 25, 2021
    Publication date: March 16, 2023
    Inventors: Scott D. Schwab, Geeta Vadehra, Michel Nuckols
  • Publication number: 20220136968
    Abstract: The present disclosure provides methods for identifying a hydrocarbon fuel, such as the presence and/or amounts of marker compounds having a fluorescence intensity and, through correlation, the presence and/or amounts of additive package(s) within the hydrocarbon fuel.
    Type: Application
    Filed: November 2, 2020
    Publication date: May 5, 2022
    Inventor: Scott D. Schwab
  • Publication number: 20190382674
    Abstract: The present disclosure provides fuel additives including a quaternary ammonium salt formed by reacting an alkyl carboxylate with a compound formed from a hydrocarbyl substituted acylating agent reacted with a select amine. Also provided herein are fuel compositions including the novel fuel additives and methods of combusting a fuel including the fuel additives herein. The unique quaternary ammonium salts herein are advantageous because they can be made through a simple alkylation process and provide improved detergency at low treat rates by making available a relatively less sterically hindered quaternary nitrogen for detergency activity in the fuel.
    Type: Application
    Filed: May 3, 2019
    Publication date: December 19, 2019
    Inventor: Scott D. Schwab
  • Patent number: 10407636
    Abstract: A fuel composition, a lubricant composition, and methods for reducing friction or wear of moving parts. The fuel composition includes gasoline and from about 10 to about 500 ppm by weight of a dialkylaminoalkanol of the formula R1(R2)NCH2CH(R3)R4. The lubricant composition includes base oil of lubricating viscosity and from about 0.05 to about 5.0 weight percent of a dialkylaminoalkanol of the formula R1(R2)NCH2CH(R3)R4. In the above formulas wherein R1 is an alkyl group or a hydroxy alkyl group containing from 8 to 50 carbon atoms; R2 is an alkyl group containing from 1 to 4 carbon atoms; R3 is selected from H and OH; and R4 is selected from H, an alkyl group containing from 1 to 4 carbon atoms, and CH2OH and wherein at least one of R3 and R4 contains a hydroxyl group and provided that when R1 is a hydroxyalkyl group, R3 is OH and R4 is CH2OH.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: September 10, 2019
    Assignee: Afton Chemical Corporation
    Inventors: Scott Culley, Xinggao Fang, Scott D. Schwab
  • Patent number: 10308888
    Abstract: The present disclosure provides fuel additives including a quaternary ammonium salt formed by reacting an alkyl carboxylate with a compound formed from a hydrocarbyl substituted acylating agent reacted with a select amine. Also provided herein are fuel compositions including the novel fuel additives and methods of combusting a fuel including the fuel additives herein. The unique quaternary ammonium salts herein are advantageous because they can be made through a simple alkylation process and provide improved detergency at low treat rates by making available a relatively less sterically hindered quaternary nitrogen for detergency activity in the fuel.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: June 4, 2019
    Assignee: AFTON CHEMICAL CORPORATION
    Inventor: Scott D. Schwab
  • Patent number: 10273425
    Abstract: A carrier fluid or fluidizer for use in fuel performance additives or fuels including such additives is described herein. The novel carrier fluids include a unique blend of alkoxylated alcohols or polyols providing unexpected performance improvements to fuel performance additives and fuels incorporating the additives. The carrier fluids, when combined with at least a detergent, provide desired valve stick performance and unexpectedly improve the intake valve deposit performance at the same time.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: April 30, 2019
    Assignee: Afton Chemical Corporation
    Inventors: Makaye Tabibi, Scott D. Schwab, Charles S. Shanahan, William J. Colucci
  • Publication number: 20180258361
    Abstract: A carrier fluid or fluidizer for use in fuel performance additives or fuels including such additives is described herein. The novel carrier fluids include a unique blend of alkoxylated alcohols or polyols providing unexpected performance improvements to fuel performance additives and fuels incorporating the additives. The carrier fluids, when combined with at least a detergent, provide desired valve stick performance and unexpectedly improve the intake valve deposit performance at the same time.
    Type: Application
    Filed: March 13, 2017
    Publication date: September 13, 2018
    Inventors: Makaye Tabibi, Scott D. Schwab, Charles S. Shanahan, William J. Colucci
  • Publication number: 20180127675
    Abstract: A fuel composition, a lubricant composition, and methods for reducing friction or wear of moving parts. The fuel composition includes gasoline and from about 10 to about 500 ppm by weight of a dialkylaminoalkanol of the formula R1(R2)NCH2CH(R3)R4. The lubricant composition includes base oil of lubricating viscosity and from about 0.05 to about 5.0 weight percent of a dialkylaminoalkanol of the formula R1(R2)NCH2CH(R3)R4. In the above formulas wherein R1 is an alkyl group or a hydroxy alkyl group containing from 8 to 50 carbon atoms; R2 is an alkyl group containing from 1 to 4 carbon atoms; R3 is selected from H and OH; and R4 is selected from H, an alkyl group containing from 1 to 4 carbon atoms, and CH2OH and wherein at least one of R3 and R4 contains a hydroxyl group and provided that when R1 is a hydroxyalkyl group, R3 is OH and R4 is CH2OH.
    Type: Application
    Filed: January 4, 2018
    Publication date: May 10, 2018
    Inventors: Scott Culley, Xinggao Fang, Scott D. Schwab
  • Patent number: 9873848
    Abstract: Methods for improving the injector performance, unsticking fuel injectors, and reducing an amount of alkali metal carboxylate deposits on internal components of fuel injectors. The method includes operating the diesel engine on a fuel composition comprising a major amount of diesel fuel and from about 45 to about 550 ppm by weight based on a total weight of fuel composition of a fuel additive consisting essentially of a compound of the formula wherein R is an alkyl or alkenyl group containing from 20 to 170 carbon atoms. The additive has a total acid number (TAN) ranging from about 50 to about 290 mg KOH/g. Fuel injectors of the fuel injected diesel engine have an average injector hole diameter of less than 160 ?m and an average smallest clearance between injector needle and injector barrel/casing of less than about 10 ?m.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: January 23, 2018
    Assignee: Afton Chemical Corporation
    Inventors: Xinggao Fang, Scott D. Schwab
  • Patent number: 9873849
    Abstract: A fuel composition, a lubricant composition, and methods for reducing friction or wear of moving parts. The fuel composition includes gasoline and from about 10 to about 500 ppm by weight of a dialkylaminoalkanol of the formula R1(R2)NCH2CH(R3)R4. The lubricant composition includes base oil of lubricating viscosity and from about 0.05 to about 5.0 weight percent of a dialkylaminoalkanol of the formula R1(R2)NCH2CH(R3)R4. In the above formulas wherein R1 is an alkyl group or a hydroxyalkyl group containing from 8 to 50 carbon atoms; R2 is an alkyl group containing from 1 to 4 carbon atoms; R3 is selected from H and OH; and R4 is selected from H, an alkyl group containing from 1 to 4 carbon atoms, and CH2OH and wherein at least one of R3 and R4 contains a hydroxyl group and provided that when R1 is a hydroxyalkyl group, R3 is OH and R4 is CH2OH.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: January 23, 2018
    Assignee: Afton Chemical Corporation
    Inventors: Scott A. Culley, Xinggao Fang, Scott D. Schwab
  • Publication number: 20170166826
    Abstract: A fuel composition, a lubricant composition, and methods for reducing friction or wear of moving parts. The fuel composition includes gasoline and from about 10 to about 500 ppm by weight of a dialkylaminoalkanol of the formula R1(R2)NCH2CH(R3)R4. The lubricant composition includes base oil of lubricating viscosity and from about 0.05 to about 5.0 weight percent of a dialkylaminoalkanol of the formula R1(R2)NCH2CH(R3)R4. In the above formulas wherein R1 is an alkyl group or a hydroxyalkyl group containing from 8 to 50 carbon atoms; R2 is an alkyl group containing from 1 to 4 carbon atoms; R3 is selected from H and OH; and R4 is selected from H, an alkyl group containing from 1 to 4 carbon atoms, and CH2OH and wherein at least one of R3 and R4 contains a hydroxyl group and provided that when R1 is a hydroxyalkyl group, R3 is OH and R4 is CH2OH.
    Type: Application
    Filed: December 10, 2015
    Publication date: June 15, 2017
    Inventors: Scott A. CULLEY, Xinggao FANG, Scott D. SCHWAB
  • Patent number: 9677020
    Abstract: 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: Grant
    Filed: June 25, 2014
    Date of Patent: June 13, 2017
    Assignee: Afton Chemical Corporation
    Inventors: Xinggao Fang, Scott D. Schwab, Daniel Taylor
  • Publication number: 20170158977
    Abstract: Methods for improving the injector performance, unsticking fuel injectors, and reducing an amount of alkali metal carboxylate deposits on internal components of fuel injectors. The method includes operating the diesel engine on a fuel composition comprising a major amount of diesel fuel and from about 45 to about 550 ppm by weight based on a total weight of fuel composition of a fuel additive consisting essentially of a compound of the formula wherein R is an alkyl or alkenyl group containing from 20 to 170 carbon atoms. The additive has a total acid number (TAN) ranging from about 50 to about 290 mg KOH/g. Fuel injectors of the fuel injected diesel engine have an average injector hole diameter of less than 160 ?m and an average smallest clearance between injector needle and injector barrel/casing of less than about 10 ?m.
    Type: Application
    Filed: December 4, 2015
    Publication date: June 8, 2017
    Inventors: Xinggao FANG, Scott D. SCHWAB
  • Patent number: 9523057
    Abstract: A diesel fuel additive package, diesel fuel containing the additive and methods for operating an engine on the diesel fuel and additive. The fuel additive includes a reaction product of (a) a hydrocarbyl substituted dicarboxylic acid or anhydride, and (b) 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 contains at least one amino triazole group. Component (2) of the additive is a hydrocarbyl succinimide dispersant. The additive also includes (3) a C2 to C10 alkyl alcohol; and (4) optionally, a lubricity additive. In the additive, a weight ratio of component (1) to component (2) in the fuel ranges from about 1:3 to about 1:5.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: December 20, 2016
    Assignee: Afton Chemical Corporation
    Inventors: James Wager, David P. Cleaver, Matthew H. Lindner, Julienne M. Galante-Fox, Scott D. Schwab, John Bennett
  • Patent number: 9464252
    Abstract: 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: Grant
    Filed: October 8, 2013
    Date of Patent: October 11, 2016
    Assignee: Afton Chemical Corporation
    Inventors: Scott D. Schwab, Xinggao Fang
  • Patent number: 9382495
    Abstract: A fuel additive and method for improving fuel economy in an engine. The method includes providing a fuel composition to an engine, wherein the fuel composition includes gasoline and from about 10 to about 750 ppm by weight based on a total weight of the fuel composition of a fuel stable additive of the formula wherein R1 comprises a saturated hydrocarbyl group having from 6 to 30 carbon atoms, R2 is an alkyl, polyalkyl, alkoxyalkyl or polyalkoxyalkyl group containing from 2 to 25 carbon atoms, R3 is an alkyl group containing from 2 to 5 carbon atoms, R4 is a linear alkyl group containing 2 to 3 carbon atoms, and x is an integer selected from 0 and 1, and combusting the fuel composition in the engine.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: July 5, 2016
    Assignee: Afton Chemical Corporation
    Inventors: Xinggao Fang, Scott A. Culley, Scott D Schwab
  • Patent number: 9340742
    Abstract: The disclosure provide a sulfur-free and halogen-free synergistic additive concentrate for a fuel injected engine. The additive concentrate includes (a) an alkoxylated quaternary ammonium salt of the formula (R1)nN[(R2O)xH]m, wherein R1 contains from 1 to 25 carbon atoms, R2 contains from 1 to 4 carbon atoms, n and m are each integers from 1 to 3, provided n+m=4, and x is an integer of from 1 to 5; and (b) a material containing a hydrogen-bonding group other than an alkyl hydroxyl group selected from the group consisting of a hydrocarbyl acid; hydrocarbyl polyacid; hydrocarbyl substituted hydroxybenzene; hydrocarbyl substituted succinic diamide, acid/amide, diacid, diester, ester/acid, amide/ester, imide; aminotriazole, and mixtures thereof, wherein the hydrocarbyl substituent has a number average molecular weight of from about 100 to about 1500, and wherein a weight ratio of (a) to (b) in the additive ranges from about 1:5 to about 1:1.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: May 17, 2016
    Assignee: Afton Chemical Corporation
    Inventors: Xinggao Fang, Scott D. Schwab
  • Patent number: 9321976
    Abstract: A fuel composition and method for reducing friction or wear and improving fuel economy in an engine. The fuel composition includes gasoline and from about 10 to about 750 ppm by weight based on a total weight of the fuel composition of a hydroxyalkyl hydrocarbyl-substituted succinimide compound having at least two hydroxyl groups attached to a tertiary nitrogen atom of a polyamino group through a hydrocarbyl link, wherein the hydroxyalkyl hydrocarbyl-substituted succinimide is devoid of primary and secondary amino groups.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: April 26, 2016
    Assignee: Afton Chemical Corporation
    Inventors: Xinggao Fang, Scott A. Culley, Scott D. Schwab