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| Number | Title | Issue Date |
| 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 |
| 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 |
| 5223163 | Metal phenates Overbased metal phenates, preferably metal phenate sulfides, having a higher alkalinity, reflected by the total base number (TBN), and having good viscosity characteristics, are overbased in the presence of a carboxylic acid, preferably oleic acid and a d... | 06/29/1993 |
| 5169564 | Thermooxidatively stable compositions A composition which is thermooxidatively stable is provided which comprises a normally thermooxidatively unstable organic compound and effective amount of a thermooxidative stabilizing composition comprising an oil soluble sulfonate of a metal selected fr... | 12/08/1992 |
| 4708809 | Two-cycle engine oils containing alkyl phenols Lubricating oils are described which are useful in two-cycle engines. These oils contain a minor amount of at least one phenolic compound of the general formula wherein R is a substantially saturated, hydrocarbon-based group of an average of at least 10 a... | 11/24/1987 |
| 4181619 | Antiwear composition Hydraulic fluids containing the reaction product of benzotriazole and tricresyl phosphate are stabilized by the addition thereto of minor amounts of calcium dinonyl naphthalene sulfonate and calcium alkyl phenate. Such fluids and other oleaginous composit... | 01/01/1980 |
