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| Number | Title | Issue Date |
| 7417012 | Slow release lubricant additives gel A lubricant additive gel formed by the gellation of two or more lubricant additives for the slow release of the additive components into a fluid. The lubricant additive gel slowly releases into its component lubricant additives when contacted with the fluid such as ... | 08/26/2008 |
| 7183241 | Long life lubricating oil composition with very low phosphorus content A lubricating oil with very low phosphorus content, and having long life as evidenced by a reduction in viscosity increase, oxidation and nitration, comprises a major amount of a base oil of lubricating viscosity and a minor amount of a mixture of neutral and overba... | 02/27/2007 |
| 7101830 | Gas engine lubricating oil composition A gas engine lubricating oil composition having a boron content of more than 95 ppm, the gas engine lubricating oil composition comprising: a major amount of a lubricating oil having a viscosity index of 80 to 120, and including at least 90 mass percent of saturates... | 09/05/2006 |
| 7087557 | Metal-containing neutral and overbased salicylates based on styrenated salicylic acid A salicylate is disclosed, which has detergent and anti-oxidant properties, for use as a metal based detergent additive. An alkyl salicylic acid is derived from the alkylation of salicylic acid with styrene. The neutralization and subsequent overbasing of neutral sa... | 08/08/2006 |
| 7053027 | Lubricating oil compositions A trunk piston marine diesel engine lubricating oil composition is dispersant-free, has a TBN of 25 or greater, and comprises (A) an oil of lubricating viscosity, (B) an aromatic carboxylate as the sole overbased metal detergent, and ... | 05/30/2006 |
| 7022639 | Catalytic activity accelerant used in petroleum hydrogenation The present invention provides a catalytic activity accelerant. The accelerant is added to stock oil for increasing the catalyst activity, the depth of catalytic hydrogenation and the yield of catalytic hydrogenation product, degrading the reaction conditions of cat... | 04/04/2006 |
| 6809069 | Lubricating oil composition A lubricating oil composition which comprises a lubricating base oil and a sulfonate, phenate or salicylate of an alkaline earth metal and has a friction coefficient between metals of 0.12 or higher at −20° C. as measured in accordance with a block-on-disk test. ... | 10/26/2004 |
| 6645922 | Lubrication A lubricating oil composition suitable for a two-stroke cross-head marine diesel engine. The lubricating oil composition comprises a base oil and an oil-soluble overbased metal detergent additive in the form of a complex wherein the basic material of the ... | 11/11/2003 |
| 6596672 | Low ash lubricant compositions containing multiple overbased materials and multiple antioxidants A low sulfate ash lubricating oil composition comprising an oil of lubricating viscosity, 0.1 to 3.0% of a calcium overbased acidic material, 0.1 to 2.0% of a magnesium overbased acidic material, and at least 0.5% of a combination of an alkylene-coupled h... | 07/22/2003 |
| 6528459 | Marine lubricant for two-stroke engine The invention concerns a lubricant for a two-stroke slow speed crosshead marine engine, powered with a fuel with sulfur content not less than 1%, consisting of a mixture of distillates used as lubricating bases containing x wt. % of dispersing additive of... | 03/04/2003 |
| 6479440 | Alkaline earth alkylaryl sulfonates, their application as an additive for lubricating oil, and methods of preparation An alkaline earth alkylaryl sulfonate having a BN of at least 250, wherein the aryl radical is not phenol, wherein the alkyl chain is a linear chain that contains between 14 and 40 carbon atoms, and wherein the mole % of the aryl-sulfonate radical fixed o... | 11/12/2002 |
| 6468946 | Mixed phosphorus compounds and lubricants containing the same This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity and (A) a di or trihydrocarbyl phosphite, (B) at least one reaction product of a di or trihydrocarbyl phosphite and sulfur or a source of sulf... | 10/22/2002 |
| 6444625 | High viscosity overbased sulfonate detergent and marine cylinder oils containing same An overbased calcium sulfonate detergent having a high viscosity is characterized by forming a clear solution in lubricating oil, having a TBN of about 400 or more, and having a viscosity of at least 180 mm2 /s at 100° C. The high viscosity of... | 09/03/2002 |
| 6444624 | Lubricating oil composition An SAE OW-30 or 5W-30 or 5W-20 lubricant has a Noack volatility of less than 15, optionally an M-111 fuel economy of 1.5% or less, and a chlorine content of less than 100 ppm. The lubricant comprises a basestock containing from 0 to less than 10% Group I ... | 09/03/2002 |
| 6423670 | Lubricating oil compositions A heavy duty diesel engine lubricating oil composition having no more than 0.10 wt. % phosphorus comprises an ashless dispersant, a neutral calcium phenate, an overbased calcium or magnesium sulfonate, a metal dihydrocarbyldithiophosphate, and a phenolic ... | 07/23/2002 |
| 6306801 | Lubricating oil composition comprising acylated bissuccinimide, zinc dithiophosphate and metallic detergent A lubricating oil composition having an excellent sludge formation inhibiting effect and being suitable for use as an engine oil is provided. The lubricating oil composition includes: a lubricating base oil, (A) 0.5 to 20% by mass of acylated bissuccinimi... | 10/23/2001 |
| 6268318 | Process for making overbased calcium sulfonate detergents using calcium oxide and a less than stoichiometric amount of water A. process for producing an overbased oil soluble calcium sulfonate, comprising the steps of: (a) mixing a substrate comprising a sulfonic acid or a calcium salt of a sulfonic acid, with at least one alcohol, a diluent oil, a carboxylic acid, an acidic ma... | 07/31/2001 |
| 6239084 | Viscosity drift control in overbased detergents Viscosity increase or drift control occurs in overbased detergents in storage over time and particularly at elevated temperatures. Viscosity drift is now controlled by the addition of additive amounts of a compound having an oleophilic group and further h... | 05/29/2001 |
| 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 |
| 6191081 | Long life medium and high ash oils with enhanced nitration resistance A long life lubricating oil as evidenced by a reduction in viscosity increase, oxidation and nitration, comprises a major amount of a base oil of lubricating viscosity and a minor amount of a mixture of high TBN, medium TBN and low/neutral TBN detergents ... | 02/20/2001 |
| 6159912 | Low viscosity, chloride-free, low overbased alkyl-aryl-sulfonate, its application as an additive for lubricating oil, and methods of preparation A low overbased alkyl phenyl sulfonate prepared by the neutralization of sulfonic acid with a sulfurized high TBN calcium alkylphenate in the absence of chloride and in the absence of additional carboxylic acid.... | 12/12/2000 |
| 6140281 | Long life lubricating oil using detergent mixture A lubricating oil of enhanced life as evidenced by a reduction in viscosity increase, nitration, and TBN depletion and equivalent or improved oxidation and TAN increase performance relative to commercial oils comprises a major amount of a base oil of lubr... | 10/31/2000 |
| 6140282 | Long life lubricating oil composition using particular detergent mixture A long life lubricating oil as evidenced by a reduction in viscosity increase, oxidation and nitration, comprises a major amount of a base oil of lubricating viscosity and a minor amount of a mixture of high TBN, medium TBN and low/neutral TBN detergents ... | 10/31/2000 |
| 6127321 | 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... | 10/03/2000 |
| 6100226 | Simple metal grease compositions Improved grease compositions comprise a major amount of an oil based metal soap thickened base grease selected from the group consisting of simple metal soap thickened base grease, complex grease and failed complex grease, at least one sulfur and phosphor... | 08/08/2000 |
| 6063742 | Grease compositions Improved grease compositions comprise a major amount of an oil based metal soap thickened base grease selected from the group consisting of simple metal soap thickened base grease, complex grease and failed complex grease, at least one metal salt of a sul... | 05/16/2000 |
| 6054419 | Mixture of alkyl-aryl-sulfonates of alkaline earth metals, its application as an additive for lubricating oil, and methods of preparation Mixture of alkyl aryl sulfonates of superalkalinized alkaline earth metals comprising: (a) 50 to 85% by weight of a mono alkyl phenyl sulfonate with a C14 to C40 linear chain wherein the molar proportion of phenyl sulfonate substitue... | 04/25/2000 |
| 6034039 | Lubricating oil compositions Complex detergents provide improved deposit control and corrosion protection in crankcase lubricants.... | 03/07/2000 |
| 6015778 | Process for making overbased calcium sulfonate detergents using calcium oxide and a less than stoichiometric amount of water A process for producing an overbased oil soluble calcium sulfonate, comprising the steps of: (a) mixing a substrate comprising a sulfonic acid or a calcium salt of a sulfonic acid, with at least one alcohol, a diluent oil, a carboxylic acid, an acidic mat... | 01/18/2000 |
| 5985805 | Colloidal thio-phosphorous products derived from colloidal lime, their preparation and uses Novel colloidal calcium thio-phosphorous products are described which can be obtained by a process comprising adding at least one phosphorus sulphide to colloidal lime in the presence of solvent, then heating the mixture, with stirring, then eliminating t... | 11/16/1999 |
| 5922655 | Magnesium low rate number sulphonates Magnesium low base number (LBN) sulphonates derived from high molecular weight sulphonic acids have low viscosity and are chloride free. The magnesium low base number sulphonates are not skin sensitisers. In their preparation neutralisation of high molecu... | 07/13/1999 |
| 5908816 | Metal working oil composition The present invention is directed to a metal working oil composition comprising the following components (A), (B), and (C), and optionally (D): (A): a lubrication base oil, (B): 0.1-30% by weight of an overbasic alkaline earth metal sulfonate with respect to t... | 06/01/1999 |
| 5804537 | Crankcase lubricant compositions and method of improving engine deposit performance A low phosphorus passenger car motor oil containing an oil of lubricating viscosity as the major component and a tri-metal detergent mixture as a minor component, wherein the tri-metal detergent mixture comprises at least one calcium overbased metal deter... | 09/08/1998 |
| 5792735 | Lubricating oil compositions A lubricating oil composition suitable for use in low or medium speed diesel engines comprises a fuel oil with a residual oil content characterised in that the lubricating oil composition further comprises a hydrocarbyl-substituted phenate concentrate hav... | 08/11/1998 |
| 5726130 | Cutting or grinding oil composition A cutting or grinding oil composition comprising (A) a base oil and (B) at least one compound selected from the group consisting of dibasic acids having 2 to 6 carbon atoms, tribasic acids having 3 to 6 carbon atoms, and ester derivatives of these acids; ... | 03/10/1998 |
| 5726133 | Low ash natural gas engine oil and additive system The present invention is directed to a low ash natural gas engine oil which contains an additive package including a particular combination of detergents and also containing other standard additives such as dispersants, antioxidants, antiwear agents, meta... | 03/10/1998 |
| 5599780 | Metal working oil composition A metal working oil composition having a kinematic viscosity of 20 cSt or less at a temperature of 40° C. is herein disclosed which comprises (A) 10% by weight or more of an n--olefin (e.g. 1-hexadecene) and (B) an overbased sulfonate having a tot... | 02/04/1997 |
| 5562864 | Lubricating compositions and concentrates A lubricating oil composition is described which comprises a major amount of an oil of lubricating viscosity and (A) at least about 1% by weight of at least one carboxylic derivative composition produced by reacting (A-1) at least one substituted succinic acyl... | 10/08/1996 |
| 5492638 | Gear oil lubricants of enhanced friction properties 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 ... | 02/20/1996 |
| 5486300 | Lubricating compositions This invention relates to a lubricating oil composition, comprising: a major amount of an oil of lubricating viscosity; and (A) an amount of at least one alkali metal overbased salt of an acidic organic compound sufficient to provide at least about 0.005 equivalent... | 01/23/1996 |
