Patents Assigned to Ethyl Petroleum Additives, Limited
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Patent number: 5919276Abstract: 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: GrantFiled: February 9, 1998Date of Patent: July 6, 1999Assignee: Ethyl Petroleum Additives LimitedInventor: Gareth Charles Jeffrey
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Patent number: 5789353Abstract: An oil-soluble dispersant obtainable by reacting a polyalkenyl succinic acylating agent and N-(2-(4-morphinyl)ethyl)-1,2-ethane diamine.Type: GrantFiled: April 21, 1997Date of Patent: August 4, 1998Assignee: Ethyl Petroleum Additives LimitedInventor: Roger Scattergood
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Patent number: 5767045Abstract: Hydraulic fluid compositions and additive concentrates are described that provide improved wet filtrability. The additive components comprise a mixture formed from at least (a) a zinc dihydrocarbyl dithiophosphate anti-wear agent, (b) a succinimide compound, and optionally (c) one or more alkali metal or alkaline earth metal-containing detergents.Type: GrantFiled: December 2, 1996Date of Patent: June 16, 1998Assignee: Ethyl Petroleum Additives LimitedInventor: Helen T. Ryan
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Patent number: 5700764Abstract: Lubricants and additive packages that give exceptional performance as heavy duty gear lubricants are described. Four essential oil-soluble additive components are used in combination, viz., a metal-free sulfur-containing antiwear and/or extreme pressure agent having a copper corrosion test activity of not more than 65; a metal-free phosphorus- and nitrogen-containing antiwear and/or extreme pressure agent; an organic carboxylic acid; and an organic amine. Tests comparing the performance of the invention against a commercial premium API GL-5 gear oil additive package selected as the best available package by a well-known OEM have shown the superiority of the present compositions under a number of test conditions.Type: GrantFiled: May 8, 1996Date of Patent: December 23, 1997Assignee: Ethyl Petroleum Additives LimitedInventors: David Kenvyn Walters, Ian Macpherson
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Patent number: 5691283Abstract: In a motor vehicle, especially a heavy duty motor vehicle, having a transmission equipped with at least one cone-type synchronizer and an axle or differential gearing, the same lubricant is used for both such mechanisms. The lubricant has a viscosity grade level of from SAE 75W90 to SAE 85W140 and comprises base oil containing at least (i) Mannich base ashless dispersant; (ii) metal-free, sulphur-containing antiwear and/or extreme pressure agent; (iii) metal-free, phosphorus-containing and nitrogen-containing antiwear and/or extreme pressure agent; and (iv) overbased alkali or alkaline earth metal carboxylate, sulphonate or sulphurized phenate having a TBN of at least 145. The lubricant contains at most, if any, 100 ppm of metal as one or more metal-containing additive components other than (iv).Type: GrantFiled: June 7, 1995Date of Patent: November 25, 1997Assignee: Ethyl Petroleum Additives LimitedInventors: Julia C. Poat, Graeme M. Wallace, David Kenvyn Walters, Ian Macpherson
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Patent number: 5604188Abstract: Novel zinc additives are provided which function as antioxidants and extreme pressure agents for lubricants and possess high thermal stability. In addition, they exhibit good filterability performance and good corrosion resistance. The zinc-containing additives are formed by admixing (i) at least one zinc dialkyldithiophosphate wherein each alkyl group contains 6 to 12 carbon atoms and is branched on its beta-carbon atom, and (ii) at least one zinc alkanoate wherein each alkanoate group is branched on its beta-carbon atom, in a ratio of 6.0 to 8.0 equivalents of (i) per equivalent of (ii).Type: GrantFiled: September 18, 1995Date of Patent: February 18, 1997Assignee: Ethyl Petroleum Additives LimitedInventor: Helen T. Ryan
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Patent number: 5595966Abstract: Certain hydrogenated oligomers of 1-alkene hydrocarbons have been found to be substantially biodegradable upon exposure to microbiological agents of types widely available in the environment. Thus, in an operation wherein lubricating oil or functional fluid is released into the environment, there is provided for use as the lubricating oil or functional fluid a substantially biodegradable lubricating oil or functional fluid at least 10 percent by volume of which is composed of at least one substantially biodegradable liquid hydrocarbon of lubricating viscosity formed by oligomerisation of 1-alkene hydrocarbon having 6 to 20 carbon atoms in the molecule and hydrogenation of the resultant oligomer.Type: GrantFiled: July 18, 1991Date of Patent: January 21, 1997Assignee: Ethyl Petroleum Additives LimitedInventors: Mark Rees, Ian MacPherson
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Patent number: 5587432Abstract: Novel ashless dispersants that have reduced reactivity toward fluoroelastomers are described. They are oil-soluble products obtained by a process which comprises reacting (i) a long chain succinic acylating agent wherein the long chain is derived from a polyolefin with (ii) an alkoxylated diethylene triamine having an average of from 1 to 2 N-substituted C.sub.2 or C.sub.3 hydroxyalkyl groups per molecule. These reactants being employed in proportions of at least 2 moles of the acylating agent per mole of the alkoxylated diethylene triamine, with the proviso that where the average of N-substituted C.sub.2 or C.sub.3 hydroxyalkyl groups is 1.7 or more, the proportions are such that there are more than 2 moles of the acylating agent per mole of the alkoxylated diethylene triamine.Type: GrantFiled: November 30, 1994Date of Patent: December 24, 1996Assignee: Ethyl Petroleum Additives LimitedInventor: Roger Scattergood
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Patent number: 5575823Abstract: Heavy diesel fuels, especially those containing sulphur and intended for marine or railroad use, are improved by incorporation therein of a combination of a cyclomatic manganese tricarbonyl and an ashless dispersant and optionally an antioxidant. Diesel fuels so modified show improved combustion characteristics and fuel economy.Type: GrantFiled: December 21, 1990Date of Patent: November 19, 1996Assignee: Ethyl Petroleum Additives LimitedInventors: Graeme M. Wallace, James P. Simmonds
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Patent number: 5525127Abstract: Hydrocarbonaceous distillate fuel compositions and additive concentrates are described that provide improved performance in evaporative burners. The additive components comprise a mixture formed from at least (a) a cyclopentadienyl manganese tricarbonyl compound; (b) a succinic derivative ashless dispersant; (c) an aliphatic dicarboxylic acid having at least 24 carbon atoms in the molecule, the two carboxyl groups being separated from each other by at least 6 carbon atoms; and (d) a metal deactivator of the chelation type. Preferably, the compositions also contain (e) alkoxylated alkylphenol; (f) a demulsifying agent; (g) a tertiary monoamine in which each substituent on the nitrogen atom is a hydrocarbyl group; and (h) liquid inert solvent having a final boiling point no higher than approximately 300.degree. C. The compositions are devoid of any metal-containing additive component other than the cyclopentadienyl manganese tricarbonyl compound.Type: GrantFiled: November 30, 1994Date of Patent: June 11, 1996Assignee: Ethyl Petroleum Additives LimitedInventor: Gareth C. Jeffrey
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Patent number: 5505868Abstract: An oil soluble dispersant composition formed by reacting a basic nitrogen-containing ashless dispersant (i) with at least one dibasic acylating agent, (ii) with at least one phosphorus compound, and (iii) with at least one boron compound, said reactions (i), (ii) and (iii) being conducted concurrently or sequentially in any order such that the initial ashless dispersant is chemically modified via acylation in (i), by phosphorylation in (ii), and by boronation in (iii).Type: GrantFiled: October 6, 1992Date of Patent: April 9, 1996Assignee: Ethyl Petroleum Additives LimitedInventors: Helen T. Ryan, Roger Scattergood, Mark Rees
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Patent number: 5492638Abstract: The frictional properties of gear oils are improved by including at least one overbased alkali or alkaline earth metal carboxylate, sulphonate or sulphurized phenate having a TBN of at least 200 in a gear oil which comprises: oil of lubricating viscosity at least 80% by volume of which is mineral oil, synthetic ester oil or a mixture thereof; Mannich base ashless dispersant; metal-free, sulphur-containing antiwear and/or extreme pressure agent; and metal-free, phosphorus-containing and nitrogen-containing antiwear and/or extreme pressure agent. The resultant gear oils exhibit excellent performance when used in synchromesh-based transmissions.Type: GrantFiled: March 1, 1994Date of Patent: February 20, 1996Assignee: Ethyl Petroleum Additives LimitedInventors: Graeme M. Wallace, Julia C. Poat
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Patent number: 5358652Abstract: Hydrolytic degradation of oleaginous fluids susceptible to hydrolytic degradation in the presence of moisture and the development of acidity in adventitious water are inhibited by including in the oleaginous fluids at least one oil-soluble compound containing at least one 3,5-dihydrocarbyl-4-hydroxybenzyl group attached to a primary, secondary or tertiary amino nitrogen atom, the two alpha-positions of the benzyl group being substituted by two hydrogen atoms, by two organic groups, or by one hydrogen atom and one organic group. Other phenolic compounds such as hindered phenolic antioxidants are incapable of providing such protection against hydrolytic degradation and acid buildup.Type: GrantFiled: October 26, 1992Date of Patent: October 25, 1994Assignee: Ethyl Petroleum Additives, LimitedInventor: Ian Macpherson
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Patent number: 5342531Abstract: A lubricant composition comprising a major proportion of polyalkylene glycol of lubricating viscosity and a minor proportion dissolved therein of (a) at least one sulphur-containing antiwear or extreme pressure agent, (b) at least one amine salt of at least one partially esterified monothiophosphoric acid, and (c) at least one amine salt of at least one partially esterified phosphoric acid. Such compositions have improved resistance to wear, oxidative degradation and metallic corrosion.Type: GrantFiled: May 27, 1993Date of Patent: August 30, 1994Assignee: Ethyl Petroleum Additives LimitedInventors: David K. Walters, Rodney I. Barber
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Patent number: 5254272Abstract: Lubricant compositions especially useful as hydraulic fluids contain a metal-free anti-wear or load-carrying additive containing sulphur and/or phosphorus and an amino succinate ester as corrosion inhibitor. Such compositions are free from heavy metal and have improved environmental acceptability where heavy metals are to be avoided, e.g. in agriculture. The lubricant base stock may be a biodegradable natural oil.Type: GrantFiled: November 2, 1992Date of Patent: October 19, 1993Assignee: Ethyl Petroleum Additives LimitedInventors: David K. Walters, Arthur S. Thomas
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Patent number: 5171466Abstract: Oil-soluble dispersants are formed by reacting (i) at least one aliphatic hydrocarbyl substituted succinic acylating agent in which the hydrocarbyl substituent contains an average of at least 40 carbon atoms with (ii) a mixture consisting essentially of hydrocarbyl polyamines containing from 10 to 50 weight percent acyclic alkylene polyamines and 50 to 90 weight percent cyclic alkylene polyamines. Such dispersants exhibit improved compatibility with fluoroelastomers as compared to succinimides formed from conventional alkylene polyamine mixtures predominating in acyclic isomers.Type: GrantFiled: April 19, 1991Date of Patent: December 15, 1992Assignee: Ethyl Petroleum Additives LimitedInventor: Philip S. Korosec
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Patent number: 5021176Abstract: A friction reducing additive composition comprising a long chain succinimide derivative and a long chain amide has superior friction reducing properties, especially in wet brake systems for tractors and other vehicles.Type: GrantFiled: March 5, 1990Date of Patent: June 4, 1991Assignee: Ethyl Petroleum Additives, LimitedInventors: John V. Bullen, David K. Walters
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Patent number: RE34459Abstract: A friction reducing additive composition comprising a long chain succinimide derivative and a long chain amide has superior friction reducing properties, especially in wet brake systems for tractors and other vehicles.Type: GrantFiled: July 20, 1992Date of Patent: November 30, 1993Assignee: Ethyl Petroleum Additives, LimitedInventors: John V. Bullen, David K. Walters