Patents Represented by Attorney Thomas Hamilton
  • Patent number: 6048373
    Abstract: A fuel composition comprising a spark-ignition fuel; a Mannich detergent; and a polybutene having a molecular weight distribution of 1.4 or less.
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: April 11, 2000
    Assignee: Ethyl Corporation
    Inventors: Dennis J. Malfer, William J. Colucci
  • Patent number: 6042626
    Abstract: The present invention relates to phosphorylated and/or boronated dispersants useful as thermal stability additives in distillate fuels, such as jet or diesel fuel, and fuel compositions containing said dispersants.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: March 28, 2000
    Assignee: Ethyl Corporation
    Inventor: Scott D. Schwab
  • Patent number: 6034040
    Abstract: Lubricating oil compositions having excellent thermal and oxidative stability, wear control, copper corrosion control and compatibility with seal materials comprising a mineral oil having a) a Viscosity Index of greater than 110 and an aniline point of greater than 110.degree. C. and/or b) a linear+single ring paraffin content of greater than 68 wt %, and at least one polymer selected from olefin (co) polymer(s), polyalkyl (meth) acrylate(s) and mixtures thereof. The lubricating oil compositions are particularly useful as manual transmission and axle lubricants.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: March 7, 2000
    Assignee: Ethyl Corporation
    Inventors: Nubar Ozbalik, Sanjay Srinivasan, Vincent James Gatto
  • Patent number: 6015863
    Abstract: Polymeric Mannich base condensates useful as fuel and lubricant additives. The polymeric Mannich base additives are the reaction products of poly (alpha-olefin/unsaturated acidic reactants) with Mannich base adducts of alkyl-substituted phenols condensed with aldehydes and amines.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: January 18, 2000
    Assignee: Ethyl Corporation
    Inventors: Carl Anthony Mike, Gregory Paul Anderson, Carl Kurt Esche, Jr.
  • Patent number: 6013735
    Abstract: A continuous process for the preparation of linear, branched and star-polymers via anionic polymerization of acrylic monomers, linear, branched and star-polymers obtained by the process and lubricating oil compositions thereof.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: January 11, 2000
    Assignee: Ethyl Corporation
    Inventors: Munmaya K. Mishra, Yoon S Song, Akhilesh Duggal
  • Patent number: 6001786
    Abstract: The present invention relates generally to substantially liquid, chlorine-free, sulfur-bridged phenols useful as antioxidants and more specifically to the preparation of a substantially liquid, chlorine-free, sulfur-bridged, hindered phenol compositions, using 1-propanol as the reaction solvent, which are effective antioxidant(s) in lubricating oils and liquid organic fuels without causing excessive copper corrosion and which exhibit improved elastomer seal compatibility. The invention also includes lubricating oils and liquid organic fuels containing an antioxidant additive of the present invention, as well as a method of reducing oxidation in the lubricating oil or liquid organic fuel used in a machine such as an internal combustion engine.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: December 14, 1999
    Assignee: Ethyl Corporation
    Inventors: Vincent James Gatto, Abbas Kadkhodayan
  • Patent number: 6001141
    Abstract: Low sulfur content fuel compositions containing additive compounds are described which exhibit improved lubricity. The additive compounds include a carboxylic acid substituted by at least one hydroxyl group, derivatives of the carboxylic acid substituted by at least one hydroxyl group, and an ester which is the reaction product of a carboxylic acid which does not contain any hydroxy-substitution in the acid backbone and an alkanolamine.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: December 14, 1999
    Assignee: Ethyl Petroleum Additives, Ltd.
    Inventor: Robert Quigley
  • Patent number: 5997593
    Abstract: A reaction product of at least one C.sub.5 -C.sub.60 carboxylic acid and at least one amine selected from the group consisting of guanidine, aminoguanidine, urea, thioruea and the salts thereof is disclosed as an additive for hydrocarbon fuels. The reaction product is added to a fuel, such as gasoline, at levels of from about 5 pounds of reaction product per thousands barrels of fuel (PTB) to about 100 PTB to increase the lubricity of the fuel and thereby reduce the wear occasioned upon the fuel pump. A composition comprising a hydrocarbon fuel and the reaction product is also disclosed.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: December 7, 1999
    Assignee: Ethyl Corporation
    Inventors: Thomas F. McDonnell, Anthony J. Rollin
  • Patent number: 5972851
    Abstract: Automatic transmission fluids are described which contain a dispersant having a nitrogen to phosphorus mass ratio between about 3:1 and about 10:1, and at least one friction modifier. The use of dispersants having a nitrogen to phosphorus mass ratio between about 3:1 and about 10:1 provides automatic transmission fluids which exhibit good anti-shudder properties as well as a higher mid-point torque, a higher static torque in shifting clutch applications and better frictional durability as compared to similar automatic transmission fluids which contain dispersants having a nitrogen to phosphorus mass ratio of less than 3:1.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: October 26, 1999
    Assignee: Ethyl Corporation
    Inventors: Sanjay Srinivasan, David Warren Smith, John P. Sunne
  • Patent number: 5955405
    Abstract: Non-dispersant poly (meth) acrylate copolymers comprising from about 5 to about 15 weight percent butyl methacrylate; from about 70 to about 90 weight percent of a C10-C15 alkyl (meth) acrylate; and from about 5 to about 10 weight percent of a C16-C30 alkyl (meth) acrylate provide excellent low temperature properties to lubricating oils.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: September 21, 1999
    Assignee: Ethyl Corporation
    Inventors: Gregory Peter Liesen, Sanjay Srinivasan, Larry Dale Grina
  • Patent number: 5944858
    Abstract: Hydrocarbonaceous fuels and additive compositions therefor which comprise: a) one or more fuel-soluble manganese carbonyl compounds; and b) one or more fuel-soluble alkali or alkaline earth metal-containing neutral or basic detergent salts. These compositions preferably contain, in addition to components a) and b) above, one or more of the following: c) one or more fuel-soluble ashless dispersants; d) at least one fuel-soluble demulsifying agent; e) at least one aliphatic or cycloaliphatic amine; and f) at least one metal deactivator. The compositions possess improved combustion characteristics (e.g., formation of less soot, smoke, carbonaceous products and/or noxious emissions), and form on combustion carbonaceous products of reduced acidity. The deposition of sludge on critical engine or burner parts or surfaces is reduced and the fuels have improved stability and demulsibility characteristics. And the fuel compositions can result in decreased fuel consumption in diesel engines.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: August 31, 1999
    Assignee: Ethyl Petroleum Additives, Ltd.
    Inventor: Graeme McRobert Wallace
  • Patent number: 5942470
    Abstract: Gear oils and gear oil additive concentrates of enhanced positraction performance are described. They comprise: (i) at least one oil-soluble sulfur-containing extreme pressure or antiwear agent; (ii) at least one oil-soluble amine salt of a partial ester of an acid of phosphorus; and (iii) at least one oil-soluble succinimide of the formula ##STR1## where R.sub.1 is an alkyl or alkenyl group having an average of 8 to 50 carbon atoms, and each of R.sub.2, R.sub.3 and R.sub.4 is a hydrogen atom or an alkyl or alkenyl group having an average of up to about 4 carbon atoms. These compositions preferably contain one, more preferably two, and most preferably all three of the following additional components: (iv) at least one amine salt of a carboxylic acid; (v) at least one nitrogen-containing ashless dispersant; and (vi) at least one trihydrocarbyl ester of a pentavalent acid of phosphorus.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: August 24, 1999
    Assignee: Ethyl Petroleum Additives, Inc.
    Inventors: Stephen Norman, Donald G. Campbell, Gregory S. Conary
  • Patent number: 5942471
    Abstract: Multifunctional viscosity index improvers for lubricating oils based on a hydrocarbon polymer holding pendant functional groups containing phenothiazine, and pendant functional groups containing aromatic amine antioxidant.
    Type: Grant
    Filed: July 1, 1992
    Date of Patent: August 24, 1999
    Assignee: Ethyl Corporation
    Inventors: Maria Magdalena Kapuscinski, Robert Thomas Biggs
  • Patent number: 5928392
    Abstract: A burner is operated by continuously feeding into its combustion zone while combustion is occurring therein, (a) a middle distillate burner fuel with which has been blended in any sequence or combination a minor combustion improving amount of fuel-soluble manganese polycarbonyl compound(s), and (b) a total amount of air above 100% of the stoichiometric amount required for complete combustion of all fuel being introduced into said zone but which is below 105% of such stoichiometric amount. Preferably at least alkali or alkaline earth metal-containing detergent and fuel-soluble dispersant have also been blended into the fuel being used. The efficiency of operation of blue and yellow burners is thereby improved, and emissions such as carbon monoxide and nitrogen oxide can be reduced as compared to operation of the same burner on the same unadditized base fuel.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: July 27, 1999
    Assignee: Ethyl Corporation
    Inventor: Allen A. Aradi
  • Patent number: 5919276
    Abstract: The present invention relates to fuel compositions containing a base fuel and a fuel additive, wherein the fuel additive comprises a mixture of calcium and either alkali metals, alkaline earth metals other than calcium or mixtures thereof. The present invention also relates to a method for reducing emissions in engines burning said fuel compositions.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: July 6, 1999
    Assignee: Ethyl Petroleum Additives Limited
    Inventor: Gareth Charles Jeffrey
  • Patent number: 5891203
    Abstract: This invention relates to the use of blends of diethanolamine derivatives and biodiesel as an additive for improving lubricity in low sulfur fuels and to fuels and additive concentrates comprising said lubricity additives.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: April 6, 1999
    Assignee: Ethyl Corporation
    Inventors: Keith Frederick Ball, John Gray Bostick, Timothy J. Brennan
  • Patent number: 5851962
    Abstract: A lubricant composition for a wet clutch or a wet brake is disclosed, which comprises a base oil having added thereto an inorganic phosphorus compound which may contain sulfur atoms and/or oxygen atoms as its constituent elements, or an amine salt thereof, or having added thereto said inorganic phosphoric compound or an amine salt thereof, and an organic polyol compound having at least two hydroxyl groups in one molecule. The composition which exhibits excellent frictional properties in a wet clutch or a wet brake, in particular, provides a high .mu.d (dynamic friction coefficient) and a high .mu.s (static friction coefficient), shows good prevention of vibration in a lock-up clutch (which is imparted with good durability for preventing such vibration, has friction coefficients free from the temperature dependence, and is effective as a shock absorber oil, a power steering oil, a hydraulic suspension oil, etc.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: December 22, 1998
    Assignee: Ethyl Japan Corporation
    Inventor: Kuniaki Kaga
  • Patent number: 5849047
    Abstract: 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 weight alkyl phenols and unsaturated amines. Homopolymers of the Mannich base macromonomers or copolymers with activated unsaturated monomers, such as maleic anhydride, are of particular interest as crankcase dispersants. For example, functionalization of Mannich base macromonomer/maleic anhydride copolymers with amines affords effective crankcase dispersants. Such polymeric dispersants are designed to impart superior sludge protection and improved viscometrics to lubricant oils.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: December 15, 1998
    Assignee: Ethyl Corporation
    Inventors: Daniel Y. F. Yu, Carl A. Mike
  • Patent number: 5843874
    Abstract: A clean performing gear oil for use in transmission oils and axle lubricants is provided. The gear oil having a Brookfield Viscosity at -12.degree. C. ranging from about 1,000 to about 150,000 cP, comprises a base oil having a kinematic viscosity at 100.degree. C. ranging from about 4.0 to about 41.0 cSt. Combined with the base oil is preferably a dispersant pour point depressant and/or a dispersant viscosity index improver. In a further preferred embodiment, the gear oil is essentially devoid of carboxylic-type ashless dispersants (e.g., succinimide dispersants) and Mannich base dispersants, thus realizing a cost saving over conventional gear oils which are used as transmission and axle lubricants. Functionalized polymethylacrylates (PMA) are disclosed as agents that improve the properties of the gear oil and allow for the omission of conventional dispersants.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: December 1, 1998
    Assignee: Ethyl Corporation
    Inventors: Ian Macpherson, Lee D. Saathoff, Marsha J. Lester
  • Patent number: 5840672
    Abstract: This invention relates to antioxidant compositions comprising (A) at least one secondary diarylamine, (B) at least one sulfurized olefin and/or sulfurized hindered phenol, and (C) at least one oil soluble molybdenum compound. These antioxidant compositions are highly effective at providing oxidative stability to lubricating compositions, especially for highly saturated, low sulfur lubrication base oils.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: November 24, 1998
    Assignee: Ethyl Corporation
    Inventor: Vincent James Gatto