...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 7176168 | Lubricant containing a synergistic combination of rust inhibitors, antiwear agents, and a phenothiazine antioxidant The present invention describes an improved lubricant composition comprising a particularly effective combination of components comprising ashless antiwear and rust inhibitor additives with an antioxidant liquid mixture formed by reacting an olefin with a mixture of... | 02/13/2007 |
| 6797677 | Antioxidant combination for oxidation and deposit control in lubricants containing molybdenum and alkylated phenothiazine The invention relates to a lubricating oil composition having improved antioxidant properties, and which contains a molybdenum compound and an alkylated phenothiazine. Further, it may also include a secondary diarylamine, preferably an alkylated diphenylamine. This ... | 09/28/2004 |
| 5731273 | Lubricating compositions Crankcase lubricant compositions for use in automobile or truck engines comprise a major proportion of a lubricating oil, and an antioxidant system comprising added copper present in oil-soluble form and at least one oil-soluble phenothiazine.... | 03/24/1998 |
| 5536423 | Hydraulic working oil composition for buffers A hydraulic working oil composition for buffers which comprises: a lubricating oil as a base oil, (A) at least one phosphorus-containing compound selected from the group consisting of a phosphoric acid ester having a specific structure, a phosphorous acid este... | 07/16/1996 |
| 5366648 | Functional fluids useful at high temperatures Functional fluids characterized as effective over a wide range of temperature including very high temperatures can be prepared, comprising: (A) a major amount of at least one synthetic base oil; and minor amount of (B) at least one phenolic compound selected from t... | 11/22/1994 |