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United States Patent | 4,125,479 |
Chesluk , et al. | November 14, 1978 |
Lubricating oils with superior oxidation inhibition result from the combination of additives in a lubricating oil base; the ashless additive combination comprising methylene bis(dibutyl dithiocarbamate) and 4-methyl-2,6-ditertiary butyl phenol. The above combination of additives displays synergistic activity as an oxidation inhibitor.
Inventors: | Chesluk; Ralph P. (Nederland, TX), Askew, Jr.; John D. (Houston, TX), Henderson; Clifton C. (Port Arthur, TX) |
Assignee: |
Texaco Inc.
(New York,
NY)
|
Appl. No.: | 05/750,069 |
Filed: | December 13, 1976 |
Application Number | Filing Date | Patent Number | Issue Date | ||
642972 | Dec., 1975 | ||||
Current U.S. Class: | 508/444 ; 252/402 |
Current International Class: | C10M 141/08 (20060101); C10M 141/00 (20060101); C10M 001/54 () |
Field of Search: | 252/33.6,47.5,47,402 |
2160880 | June 1939 | Loane et al. |
2201258 | May 1940 | Busse |
2251686 | August 1941 | Musselman et al. |
2371319 | March 1945 | Ross et al. |
2681316 | June 1954 | Harle |
2691632 | October 1954 | Harle |
3249542 | May 1966 | Barry |
3251811 | May 1966 | Warner et al. |
3931022 | January 1976 | Chesluk et al. |
Denton, W. M. et al., "Screening of Compounds for Anti-oxidant Activity in Motor Oil", Ins. Pet. Rev., 1966, vol. 20.. |