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| Number | Title | Issue Date |
| 5849677 | Sulfurized olefin composition and its method of preparation This invention concerns a process for preparing a sulfurized olefin containing reduced amounts of thiones using a low molecular weight hydrocarbon to precipitate the thiones from the sulfurized olefin.... | 12/15/1998 |
| 5750476 | Power transmitting fluids with improved anti-shudder durability The anti-shudder durability of power transmitting fluids, particularly automatic transmission fluids, is improved by incorporating a combination of low potency friction modifiers and phosphorus-containing compounds. The anti-shudder durability of these fl... | 05/12/1998 |
| 5622922 | Method of solubilizing a benzotriazole with a thiadiazole A homogenous product is formed by heating at a temperature in the range of from 50° to 150° C. a mixture of a benzotriazole and a 2,5-dihydrocarbyldithio-1,3,4-thiadiazole.... | 04/22/1997 |
| 5225081 | Method for removing polynuclear aromatics from used lubricating oils Used lubricating oils can be rejuvenated by passing the oil through a filter system comprising a hollow solid composite that contains a thermoplastic binder and an active filter media of a chemically active filter media, a physically active filter media, ... | 07/06/1993 |
| 5186799 | Method for improving the activity maintenance of a plasma initiator The activity maintenance of the plasma initiators used during the upgrading of a hydrocarbon feedstock in a reaction zone using microwave radiation can be improved if molecular hydrogen is added to the reaction zone such that the weight ratio of carbon (i... | 02/16/1993 |
| 5164101 | Method for reducing piston deposits Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circulating within the lubrication system of an internal combustion engine are reduced or eliminated by first cntacting the acids with a soluble weak base in the p... | 11/17/1992 |
| 5149452 | Wax isomerate having a reduced pour point A combination of a low and a high molecular weight polyalkylmethacrylate has been found to be effective in reducing the pour point of a wax isomerate to a level that cannot be obtained with conventional pour point depressants. In a preferred embodiment, t... | 09/22/1992 |
| 5124054 | Method of improving the thermal stability of quaternary ammonium hydroxides (PNE-539) The presence of a minor amount of an anti-oxidant, a metal detergent, a dispersant or mixtures thereof in a hydrocarbon liquid containing certain quaternary ammonium hydroxides has been found to be effective in improving the thermal stability of the hydro... | 06/23/1992 |
| 5116522 | Grease composition containing an ethylene copolymer having a melt index of at least about 40 A lubricating composition having improved high and low temperature properties is disclosed. More specifically, the addition of a certain ethylene copolymers having a Melt Index of at least about 40 g/10 mins. to a mixture comprising (1) a lubricating oil,... | 05/26/1992 |
| 5112482 | Filter for removing hydroperoxides from lubricating oils Hydroperoxides can be removed from a lubricating oil by contacting the oil passing through an oil filter with a heterogenous hydroperoxide decomposer. This extends the useful life of the oil and the equipment being lubricated. In a preferred embodiment, t... | 05/12/1992 |
| 5110490 | Water resistant grease composition A grease composition having improved water resistance is disclosed. More specifically, the addition of an ethylene copolymer having an amine functionality to a base grease comprising a lubricating oil and a water insoluble thickener results in a grease co... | 05/05/1992 |
| 5110489 | Water resistant grease composition A grease composition having impoved water resistance is disclosed. More specifically, the addition of a copolymer of ethylene and at least one other alpha-olefin monomer and an ethylene copolymer having an amine functionality to a base grease comprising a... | 05/05/1992 |
| 5108462 | Smoke reducing additive for two-cycle engine lubricant-fuel mixture A lubricant-fuel mixture containing an amine salt and/or amide of a thiobenzoic acid derivative is effective in reducing the smoke emitted during operation of a two-cycle internal combustion engine. A preferred thiobenzoic acid derivative is 4-hydroxy-3,5... | 04/28/1992 |
| 5094667 | Guerbet alkyl ether mono amines Distillate fuel compositions containing an alkyl ether mono amine derived from a Guerbet alcohol are effective in reducing the formation of intake valve deposits in internal combustion engines. A preferred alkyl ether mono amine is derived from a highly b... | 03/10/1992 |
| 5095055 | Using branched polymers to improve the storage stability of acid treated polymer modified asphalts (PNE-577) This invention relates to a composition and method for improving the storage stability of acid treated polymer modified asphalts. More specifically, the storage stability of an asphalt which contains greater than 1.0 wt. % polymer can be improved by addin... | 03/10/1992 |
| 5076946 | Alkylamine substituted benzotriazole containing lubricants having improved oxidation stability and rust inhibition (PNE-530) The addition of certain alkylamine substituted benzotriazole compounds to a lubricant imparts improved oxidation stability and rust inhibition to the lubricant.... | 12/31/1991 |
| 5070123 | Method for improving the storage stability of polymer modified asphalt This invention relates to a composition and method for improving the storage stability of polymer modified asphalts. More specifically, the storage stability of an asphalt which contains greater than 1.0 wt. % polymer can be improved by adding the polymer... | 12/03/1991 |
| 5069799 | Method for rejuvenating lubricating oils A filter system containing, in series, a first filter media having a chemically active filter media, a physically active filter media, or mixtures thereof and a second filter media having an inactive filter media can effectively rejuvenate used lubricatin... | 12/03/1991 |
| 5068049 | Method of cold rolling a metal The present invention relates to a metal-working lubricating oil having improved lubricity due to the addition of certain tri-esters of tri-mellitic acid to said oil. The oil thus formed is particularly well suited as roll oil lubricant in the cold rollin... | 11/26/1991 |
| 5068044 | Method for reducing piston deposits Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circulating within the lubrication system of an internal combustion engine are reduced or eliminated by first contacting the acids with a soluble weak base in the ... | 11/26/1991 |
| 5055211 | Lubricating oil containing a mixed ligand metal complex and a metal thiophosphate The addition of certain mixed ligand metal complexes and a metal thiophosphate to a lubricating oil results in a significant improvement in the anti-wear performance of the oil. Tin dithiocarbamate-ethoxyethylxanthate and zinc dialkyldithiophosphate are ... | 10/08/1991 |
| 5042617 | Method of reducing the presence of sludge in lubricating oils Sludge can be effectively removed from a lubricating oil by contacting the oil with a dispersant functional group immobilized on a substrate. This results in improved engine cleanliness and control of viscosity increases.... | 08/27/1991 |
| 5037563 | Aluminum complex grease and method of reducing the flammability of an aluminum complex grease The flammability of an aluminum complex grease can be reduced by incorporating a flame retardant amount of calcium oxide into the grease provided the calcium oxide has a Loss on Ignition value of less than 3.0.... | 08/06/1991 |
| 5035815 | Lubricating oil containing a nickel alkoxyalkylxanthate and zinc dialkyldithiophosphate The addition of a metal alkoxyalkylxanthate and a metal thiophosphate to a lubricating oil results in an unexpected synergistic improvement in the antiwear performance of the oil. Nickel ethoxyethylxanthate and zinc dialkyldithiophosphate are most preferr... | 07/30/1991 |
| 5034142 | Lubricating oil containing a nickel alkoxyalkylxanthate, a dixanthogen, and zinc dialkyldithiophosphate The addition of a metal alkoxyalkylxanthate, a dixanthogen, and a metal thiophosphate to a lubricating oil results in a synergistic improvement in the antiwear performance of the oil. Nickel ethoxyethylxanthate, diethoxyethyl dixanthogen, and zinc dialkyl... | 07/23/1991 |
| 5034141 | Lubricating oil containing a thiodixanthogen and zinc dialkyldithiophosphate The addition of a thiodixanthogen and a metal thiophosphate to a lubricating oil results in an unexpected synergistic improvement in the antiwear performance of the oil. Octylthiodixanthogen and zinc dialkyldithiophosphate are most preferred additives.... | 07/23/1991 |
| 5026492 | Lubricating oil containing an alkyl alkoxyalkylxanthate and zinc dialkyldithiophosphate The addition of an alkyl alkoxyalkylxanthate and a metal thiophosphate to a lubricating oil results in an unexpected synergistic improvement in the antiwear performance of the oil. Butyl ethoxyethylxanthate and zinc dialkyldithiophosphate are most preferr... | 06/25/1991 |
| 4997546 | Method of removing hydroperoxides from lubricating oils Hydroperoxides can be removed from a lubricating oil by contacting the oil with a heterogenous hydroperoxide decomposer. This extends the useful life of the oil and the equipment being lubricated. In a preferred embodiment, the hydroperoxide decomposer is... | 03/05/1991 |
| 4997585 | Aromatic substituted benzotriazole containing lubricants having improved oxidation stability The addition of certain aromatic substituted benzotriazole compounds to a lubricant imparts improved oxidation stability to the lubricant. The oxidation stability is particularly enhanced when the substituents on the substituted aromatic ring are strong e... | 03/05/1991 |
| 4975164 | Conversion of C2 + hydrocarbons using microwave radiation (OP-3515) C2 + hydrocarbons can be effectively converted to primarily unsaturated hydrocarbons and hydrogen using microwave radiation in the presence of at least one plasma initiator that is capable of initiating an electric discharge in an electromagnet... | 12/04/1990 |
| 4964880 | Distillate fuels containing mono alkyl substituted derivatives of thiadiazoles Distillate fuel compositions containing mono alkyl substituted derivatives of thiadiazole are effective in reducing the formation of intake valve deposits in internal combustion engines. Mono alkyl substituted derivatives of 2,5-dimercapto-1,3,4-thiadiazo... | 10/23/1990 |
| 4944864 | Process using cracking calalyst containing strontium carbonate This invention relates to a catalyst suitable for use in a fluid catalytic process and a method of using the catalyst on hydrocarbons containing one or more poison metal of vanadium or nickel to convert the hydrocarbons to lower boiling fractions. The cat... | 07/31/1990 |
| 4906389 | Method for reducing piston deposits Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circulating within the lubrication system of an internal combustion engine are reduced or eliminated by first contacting the acids with a soluble weak base in the ... | 03/06/1990 |
| 4904400 | Method of improving the shear stability of lithium soap greases A method for improving the shear stability of a multipurpose grease containing (i) a lubricating oil, (ii) a lithium soap of an hydroxy fatty acid, (iii) a polyhydric alcohol having at least three hydroxy groups, and (iv) at least two metal hydrocarbylthiophosphate... | 02/27/1990 |
| 4902437 | Engine lubricating oil comprising a quaternary ammonium hydroxide The presence of a minor amount of certain quaternary ammonium hydroxides in an engine lubricating oil has been found to be effective in reducing and controlling combustion chamber deposits and octane requirement increase in spark ignition internal combust... | 02/20/1990 |
| 4882373 | Asphaltic composition An asphaltic composition having improved tensile properties is disclosed. Also disclosed is a method for producing said composition which comprises: A. contacting an asphalt with a mineral acid; B. contacting the acid modified asphalt thus formed with an oxyge... | 11/21/1989 |
| 4877541 | Corrosion inhibitor A corrosion inhibitor for use in synthetic ester lubricating oils is disclosed which comprises an effective amount of: 1. at least one aromatic amide; and 2. at least one hydroxy substituted aromatic compound. The corrosion inhibitor thus formed is particularly use... | 10/31/1989 |
| 4873275 | Flow resistant asphalt paving binder Paving binders, especially hot mix paving structures, may be modified to have both storage stability and increased creep resistance by the addition of copolymers of ethylene with vinyl acetate or lower alkyl esters of acrylic acid and methacrylic acid to ... | 10/10/1989 |
| 4872970 | Reactivation of iridium-containing catalysts Supported iridium-containing hydrocarbon conversion catalyst that are at least partially deactivated due to the deposition of carbonaceous residues thereon during contact with hydrocarbons are reactivated by (1) contacting the catalyst with a gas containi... | 10/10/1989 |
| 4867892 | Antiwear additives for lubricating oils Metal palmitates have been found to give excellent antiwear properties to an engine lubricating oil. They are particularly effective when used in a complex with dimethyl sulfoxide.... | 09/19/1989 |
