Class 44/331 - The heterocyclic compound reactant is a dicarboxylic acid anhydride (e.g., reaction product of succinic anhydride with a polyamine, etc.)

Subclass of Class 44 - Fuel and related compositions
Definition: Compositions which contain a compound of indeterminate structure
No. of patents: 124
Last issue date: 02/17/2009

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Number	Title	Issue Date
7491248	Fuels compositions and methods for using same A fuel composition and methods for using it for controlling deposit formation in a spark-ignition internal combustion engine, such as a direct injection engine, comprising a spark-ignition fuel, a detergent, and a deposit inhibitor compound. ...	02/17/2009
7311739	Alkoxylate and alcohol free fuel additives There is described a fuel composition which is substantially free of alkoxylated compounds and is substantially free of long-chain alkyl alcohols having at least 6 C atoms, and contains at least 95% by volume of a hydrocarbon-based fuel and 0.1 to 5% by volume of an...	12/25/2007
7238650	Low-chlorine, polyolefin-substituted, with amine reacted, alpha-beta unsaturated carboxylic compounds A composition of matter comprising an amine acylated with a hydrocarbyl group substituted carboxylic acylating agent containing an average of from 1.3 to 1.6 groups derived from α,β-unsaturated carboxylic compounds per Mn of the hydrocarbyl group...	07/03/2007
7226489	Gasoline additives for reducing the amount of internal combustion engine intake valve deposits and combustion chamber deposits Compositions and methods are disclosed for reducing combustion chamber deposits (CCD) and/or intake valve deposits (IVD) in spark ignition internal combustion engines. A succinic acid derivative (SAD) of this invention or a mixture with at least one additional compo...	06/05/2007
7208022	Ethanol-diesel fuel composition and methods thereof A fuel composition for use in an internal combustion engine containing (a) a diesel fuel, (b) ethanol, (c) a surfactant, and optionally (d) a combustion improver, which provides lubricity to the engine and reduces exhaust emissions. ...	04/24/2007
7182795	Fuel lubricity additives derived from hydrocarbyl succinic anhydrides and hydroxy amines, and middle distillate fuels containing same A middle distillate fuel additive comprising the reaction product resulting from the combining of a hydrocarbyl succinic anhydride and a hydroxyamine. The lubricating properties of low sulfur-content middle distillate fuels, such as diesel, jet or bio-diesel fuels, ...	02/27/2007
7122112	Compounds containing amide and carboxyl groups as asphaltene dispersants in crude oil A composition containing: (a) 0.001% to 20% of at least one compound represented by formula (II), wherein R5 is C1–C70 difunctional alkyl or C6–C14 difun...	10/17/2006
7122113	Method for solubilising asphaltenes in a hydrocarbon mixture Method for solubilising asphaltenes in an asphaltenes-containing hydrocarbon mixture by adding thereto an effective amount of a dendrimeric compound, and a hydrocarbon mixture comprising, in addition to hydrocarbons, asphaltenes and at least one dendrimeric compound...	10/17/2006
7060787	Extraction of impurities from grafted polyolefins A process for purifying grafted polyolefins by extraction is disclosed. The purified grafted polyolefins have improved color and adhesion properties. The extraction is performed with an azeotropic solvent that is strong enough to extract impurities but does not caus...	06/13/2006
7049273	Hybridized olefin copolymer additives This invention relates to a novel multi-functional fuel and lubricant additive that provides dispersancy properties as well as viscosity index improver credit and, improved fuel economy. The invention further relates to concentrates, and to fuel and lubricating oil ...	05/23/2006
6942695	Biomedical devices with polyimide coating Intraocular lenses and methods producing the same are provided. The intraocular lens includes an optic and a haptic that are integrally formed together. The haptic has a polyimide coating. The polyimide coating promotes fibrosis in the surrounding eye tissue to enha...	09/13/2005
6905605	Method for inhibiting the plugging of conduits by gas hydrates A method for inhibiting hydrate formation in a hydrocarbon flow by adding an amount of a dendrimeric compound effective to inhibit formation of hydrates at conduit temperatures and pressures, and flowing the mixture containing the dendrimeric compound and any hydrat...	06/14/2005
6906011	Polymeric dispersants prepared from copolymers of low molecular weight polyisobutene and unsaturated acidic reagent This invention is directed to a new low molecular weight copolymer (The PIB/UAR copolymer) that may be prepared by reacting a low molecular weight polyisobutene (PIB) having less than about 32 carbon atoms with an unsaturated acidic reagent in the presence of a free...	06/14/2005
6860908	Petroleum middle distillate composition containing a substance for limiting the paraffin sedimentation rate A middle petroleum distillate composition containing a major proportion of middle petroleum distillate and a minor proportion of an additive in a sufficient amount to limit the settling speed of paraffins contained in said middle distillate. Said additive consists o...	03/01/2005
6676715	Diesel fuel stabilizer There is provided use of a thermal stabiliser for increasing the thermal stability of a cetane improver in a fuel composition comprising (i) a fuel, and (ii) the cetane improver wherein the thermal stabiliser is a compound of the formula wherein H is a gr...	01/13/2004
6660050	Method for controlling deposits in the fuel reformer of a fuel cell system A method for controlling the deposits in the fuel vaporizer of a fuel reformer used to prepare a liquid hydrocarbon for use as a fuel in a fuel cell which comprises introducing into the fuel vaporizer a liquid hydrocarbon containing an effective deposit c...	12/09/2003
6652607	Concentrated emulsion for making an aqueous hydrocarbon fuel A process to make water-blended fuel by emulsifying the emulsifier in a portion of the fuel, then adding the water under high shear mixing to give a concentrated water fuel emulsion. The concentrated emulsion is then diluted with final portion of fuel usi...	11/25/2003
6623536	Multifunctional additive composition for cold process treatment of middle distillates The invention concerns a composition of mulifunctional additives for cold process treatment obtained by reacting carboxylic compounds with amine compounds, characterized in that it contains at least 50 wt. % of a mixture consisting of 10 to 90 wt. % of an...	09/23/2003
6610110	Aviation fuels having improved freeze point A novel aviation fuel characterized by having a low freeze point (typically no higher than -40° C.) comprising a mixture of an aviation fuel and a compound selected from at least one member of the group consisting of (1) the reaction product of an al...	08/26/2003
6548458	Succinimide-acid compounds and derivatives thereof Succinimide-acid compounds prepared by reaction of hydrocarbyl-substituted succinic acylating agents with alpha-omega amino acids are disclosed, as well as derivatives thereof useful as lubricity additives, lubricant dispersants, friction modifiers, liqui...	04/15/2003
6488723	Motor fuel additive composition and method for preparation thereof A motor fuel additive composition comprises a mixture of: (a) from about 5 to about 50 weight percent, based upon the total weight of the additive, of a detergent component selected from the group consisting of (i) a reaction product of a substituted hydr...	12/03/2002
6383237	Process and apparatus for making aqueous hydrocarbon fuel compositions, and aqueous hydrocarbon fuel compositions This invention relates to a process for making an aqueous hydrocarbon fuel composition, comprising: (A) mixing a normally liquid hydrocarbon fuel and at least one chemical additive to form a hydrocarbon fuel-additive mixture; and (B) mixing said hydrocarb...	05/07/2002
6355074	Oil soluble dispersant additives useful in oleaginous compositions Hydrocarbyl substituted C4 to C10 monounsaturated dicarboxylic acid, anhydrides or esters, e.g. polyisobutenyl succinic anhydride, preferably made by reacting polymer of C2 to C10 monoolefin, preferably polyisob...	03/12/2002
6280485	Emulsified water-blended fuel compositions This invention relates to an emulsified water-blended fuel composition comprising: (A) a hydrocarbon boiling in the gasoline or diesel range; (B) water; (C) a minor emulsifying amount of at least one fuel-soluble salt made by reacting (C)(I) at least one ...	08/28/2001
6248702	Dispersant and dispersant viscosity index improvers from selectively hydrogenated aryl-substituted olefin containing diene copolymers The invention provides dispersants and dispersant viscosity index improvers which include polymers of conjugated dienes which have been hydrogenated, functionalized, optionally modified, and post treated. The dispersant substances include a copolymer of t...	06/19/2001
6224642	Additive composition This invention relates to a composition, comprising: (A) a compound represented by the formula RO(C4 H8 O)n CH2 CH2 CH2 NH2 (I) wherein in formula (I), R is an aliphatic hydrocarbyl group of a...	05/01/2001
6197075	Overbased magnesium deposit control additive for residual fuel oils An overbased magnesium composition deposit control additive for residual fuel oils and turbine fuels is an overbased magnesium sulfonate, carboxylate or phenate or mixtures thereof containing at least 14% and upwards to about 18% by weight of magnesium an...	03/06/2001
6165235	Low chlorine content compositions for use in lubricants and fuels Polyolefin substituted carboxylic acylating agents having reduced chlorine content of less than 2,000 ppm and a degree of succination of 1.1-2 have been made from polyisobutylene, chlorine and maleic anhydride. The acylating agents are further reacted wit...	12/26/2000
6146431	Polyalkylene polysuccinimides and post-treated derivatives thereof A polysuccinimide composition is prepared by reacting a mixture of an alkenyl or alkylsuccinic acid derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions. The alkenyl or alkyl substituent of the alkenyl or alkylsuc...	11/14/2000
6107450	Polyalkylene succinimides and post-treated derivatives thereof A succinimide composition is prepared by reacting a mixture of a polyalkenyl derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions. The polyalkenyl derivative is produced by reacting an unsaturated acidic reagent w...	08/22/2000
6083287	Detergent and anti-corrosive additive for fuels and fuel composition The invention concerns a detergent and anti-corrosive additive for engine fuels, in particular gas oil, containing amide or imide functions characterised in that it is obtained by mixing wt. 60 to 90% of a compound A consisting of at least one carboxylic ...	07/04/2000
6070558	Process for reducing liner lacquering in a marine diesel engine and fuel therefor This invention relates to a process for reducing liner lacquering in a marine diesel engine operating on a marine diesel fuel having a temperature for a 90% volume recovery during distillation greater than 420° C. and an aromatics content greater than 25...	06/06/2000
5925151	Detergent additive compositions for diesel fuels A detergent additive composition for diesel fuel contains a low molecular weight polyisobutylene monosuccinimide of polyethylene polyamine in an aromatic hydrocarbon diluent. The detergent additive composition may be used to remove or prevent engine depos...	07/20/1999
5912190	Synergistic process for improving combustion A process of improving the combustion of fuel and/or improving the oxidation of carbonaceous products derived from the combustion or pyrolysis of fuel is described. The process comprises adding to the fuel before the combustion thereof a composition compr...	06/15/1999
5871554	Polyolefin-substituted amines grafted with poly(aromatic-n-monomers) for olegaginous compositions Novel polymers comprising polyolefin-substituted amines grafted with aromatic N-containing monomers such as aniline, have been found to provide oil soluble polymers having dispersant and antioxidant properties in oleaginous compositions, including fuel an...	02/16/1999
5853434	Fuel compositions having polyalkylene succinimides and preparation thereof A succinimide composition is prepared by reacting a mixture of an alkenyl or alkylsuccinic acid derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions. The alkenyl or alkyl substituent of the alkenyl or alkylsuccini...	12/29/1998
5849047	Polymeric dispersants and method of making same This invention concerns the utilization of polymeric compounds generated from Mannich base macromonomers as lubricant oil and fuel additives or intermediates to such additives. Requisite macromonomers are generated via Mannich reaction of high molecular w...	12/15/1998
5814111	Gasoline compositions The present invention provides a gasoline composition comprising a major amount of a gasoline suitable for use in spark-ignition engines, a minor amount of a polyalphaolefin having a viscosity at 100° C. from about 2×10-6 m2 /s to ...	09/29/1998
5788722	High functionality low molecular weight oil soluble dispersant additives useful in oleaginous compositions Hydrocarbyl substituted C4 to C10 monounsaturated dicarboxylic acid, anhydrides or esters, e.g. polyisobutenyl succinic anhydride, preferably made by reacting polymer of C2 to C10 monoolefin, preferably polyisob...	08/04/1998
5725610	Additive composition for cold operability of middle distillates Additive composition enhancing the low temperature operability of average distillates beyond -20° C. comprising at least 40% by weight of a composition consisting of: i) from 60 to 94% by weight of an antisedimentation additive resulting from the reactio...	03/10/1998

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Class 44/331 - The heterocyclic compound reactant is a dicarboxylic acid anhydride (e.g., reaction product of succinic anhydride with a polyamine, etc.)