Patents by Inventor Carolyn Boggus Duncan
Carolyn Boggus Duncan 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: 6177387Abstract: A synthetic ester composition exhibiting low odor, and high thermal and oxidative stability which comprises the reaction product of: (a) a polyol which comprises at least dipentaerythritol, e.g., technical grade pentaerythritol and mixtures of technical grade pentaerythritol or dipentaerythritol and monopentaerythritol; and (b) a mixture of monocarboxylic acids comprising at least one linear acid selected from the group consisting of between C5-C10 acids and at least one branched acid selected from the group consisting of C7-C9 acids, wherein the amount of C5 and C6 acids is between about 20 to 45 weight %, based upon the total amount of said mixture of monocarboxylic acids, and wherein said synthetic ester composition has a viscosity of at least 4 cSt at 99° C., a viscosity of less than about 8,000 cSt at 40° C., and a pour point of at least as low as −54° C.Type: GrantFiled: February 19, 1999Date of Patent: January 23, 2001Assignee: Exxon Chemical Patents IncInventors: Richard Henry Schlosberg, Carolyn Boggus Duncan, David Wayne Turner, Thomas Lee Ashcraft, Jr., William Joseph Munley, Jr.
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Patent number: 5994278Abstract: A lubricating oil comprising an add mixture of the following components: (A) a complex alcohol ester basestock which comprises the reaction product of an add mixture of the following: (1) a polyhydroxyl compound represented by the general formula:R(OH).sub.nwherein R is any aliphatic or cyclo-aliphatic hydrocarbyl group and n is at least 2, provided that the hydrocarbyl group contains from about 2 to 20 carbon atoms; (2) a polybasic acid or an anhydride of a polybasic acid, provided that the ratio of equivalents of the polybasic acid to equivalents of alcohol from the polyhydroxyl compound is in the range between about 1.6:1 to 2:1; and (3) a monohydric alcohol, provided that the ratio of equivalents of the monohydric alcohol to equivalents of the polybasic acid is in the range between about 0.84:1 to 1.2:1; wherein the complex alcohol ester exhibits a viscosity in the range between about 100-700 cSt at 40.degree. C. and having a polybasic acid ester concentration of less than or equal to 70 wt.Type: GrantFiled: February 7, 1997Date of Patent: November 30, 1999Assignee: Exxon Chemical Patents Inc.Inventors: Carolyn Boggus Duncan, David Wayne Turner
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Patent number: 5922658Abstract: A biodegradable two-cycle lubricant which is prepared from an add mixture of: (1) a biodegradable lubricating oil comprising an add mixture of the following components: a complex alcohol ester basestock which comprises the reaction product of an add mixture of the following: a polyhydroxyl compound represented by the general formula:R(OH).sub.nwherein R is any aliphatic or cyclo-aliphatic hydrocarbyl group and n is at least 2, provided that the hydrocarbyl group contains from about 2 to 20 carbon atoms; a polybasic acid or an anhydride of a polybasic acid, provided that the ratio of equivalents of the polybasic acid to equivalents of alcohol from the polyhydroxyl compound is in the range between about 1.6:1 to 2:1; and a monohydric alcohol, provided that the ratio of equivalents of the monohydric alcohol to equivalents of the polybasic acid is in the range between about 0.84:1 to 1.2:1; wherein the complex alcohol ester exhibits a viscosity in the range between about 100-700 cSt at 40.degree. C.Type: GrantFiled: February 7, 1997Date of Patent: July 13, 1999Assignee: Exxon Chemical Patents Inc.Inventors: Carolyn Boggus Duncan, David Wayne Turner
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Patent number: 5767047Abstract: A biodegradable lubricant which is prepared from: about 60-99% by weight of at least one biodegradable synthetic ester base stock which comprises the reaction product of: a branched or linear alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2; and mixed acids comprising about 30 to 80 molar % of a linear acid having a carbon number in the range between about C.sub.5 to C.sub.12, and about 20 to 70 molar % of at least one branched acid having a carbon number in the range between about C.sub.5 to C.sub.10 and wherein no more than 10% of the branched acids used to form the biodegradable synthetic ester base stock contains a quaternary carbon; wherein the ester base stock exhibits the following properties: at least 60% biodegradation in 28 days as measured by the Modified Sturm test; a pour point of less than -25.degree. C.; a viscosity of less than 7500 cps at -25.degree. C.Type: GrantFiled: December 8, 1995Date of Patent: June 16, 1998Assignee: Exxon Chemical Patents, IncInventors: Carolyn Boggus Duncan, Leah Katherine Meade
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Patent number: 5750750Abstract: A complex alcohol ester which comprises the reaction product of an add mixture of the following: a polyhydroxyl compound represented by the general formula:R(OH).sub.nwherein R is any aliphatic or cyclo-aliphatic hydrocarbyl group and n is at least 2, provided that the hydrocarbyl group contains from about 2 to 20 carbon atoms; a polybasic acid or an anhydride of a polybasic acid, provided that the ratio of equivalents of the polybasic acid to equivalents of alcohol from the polyhydroxyl compound is in the range between about 1.6:1 to 2:1; and a monohydric alcohol, provided that the ratio of equivalents of the monohydric alcohol to equivalents of the polybasic acid is in the range between about 0.84:1 to 1.2:1; wherein the complex alcohol ester exhibits a pour point of less than or equal to -20.degree. C., a viscosity in the range between about 100-700 cSt at 40.degree. C. and having a polybasic acid ester concentration of less than or equal to 70 wt. %, based on the complex alcohol ester.Type: GrantFiled: February 7, 1997Date of Patent: May 12, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Carolyn Boggus Duncan, Paul R. Geissler, David Wayne Turner, William Joseph Munley, Jr., Martin A. Krevalis
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Patent number: 5728658Abstract: A biodegradable lubricant which is prepared from: about 60-99% by weight of at least one biodegradable synthetic ester base stock which comprises the reaction product of: a branched or linear alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2; and at least one branched oxo acid having a carbon number in the range between about C.sub.5 to C.sub.10, provided that said branched oxo acid does not include 2-ethylhexanoic acid; wherein the ester base stock exhibits the following properties: at least 60% biodegradation in 28 days as measured by the Modified Sturm test; a pour point of less than -25.degree. C.; and a viscosity of less than 7500 cps at -25.degree. C.; about 1 to 20% by weight lubricant additive package; and about 0 to 20% of a solvent.Type: GrantFiled: May 21, 1996Date of Patent: March 17, 1998Assignee: Exxon Chemical Patents IncInventor: Carolyn Boggus Duncan
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Patent number: 5681800Abstract: A biodegradable synthetic ester base stock which comprises a blend of the following base stocks: (A) the reaction product of: (1) a branched or linear alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2; and (2) mixed acids comprising about 30 to 80 molar % of a linear acid having a carbon number in the range between about C.sub.5 to C.sub.12, and about 20 to 70 molar % of at least one branched acid having a carbon number in the range between about C.sub.5 to C.sub.10 and wherein no more than 10% of the branched acids used to form the biodegradable synthetic ester base stock contains a quaternary carbon; wherein the ester base stock exhibits the following properties: at least 60% biodegradation in 28 days as measured by the Modified Sturm test, a pour point of less than -25.degree. C.; and a viscosity of less than 7500 cps at -25.degree. C.Type: GrantFiled: December 8, 1995Date of Patent: October 28, 1997Assignee: Exxon Chemical Patents Inc.Inventors: Carolyn Boggus Duncan, Leah Katherine Meade
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Patent number: 5658863Abstract: A biodegradable lubricant which is prepared from: about 60-99% by weight of at least one biodegradable synthetic ester base stock which comprises the reaction product of: a branched or linear alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2; and mixed acids comprising about 30 to 80 molar % of a linear acid having a carbon number in the range between about C.sub.5 to C.sub.12, and about 20 to 70 molar % of at least one branched acid having a carbon number in the range between about C.sub.5 to C.sub.10 and wherein no more than 10% of the branched acids used to form the biodegradable synthetic ester base stock contains a quaternary carbon; wherein the ester base stock has an oxygen to carbon ratio of between about 0.15:1 to 0.3:1 and exhibits the following properties: at least 60% biodegradation in 28 days as measured by the Modified Sturm test; a pour point of less than -25.degree. C.Type: GrantFiled: December 8, 1995Date of Patent: August 19, 1997Assignee: Exxon Chemical Patents Inc.Inventors: Carolyn Boggus Duncan, Leah Katherine Meade