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Petroleum sulfonation
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Patent number 4,269,789
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Issue date May 26, 1981
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Phillips Petroleum Company
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David R. Zornes
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C07 - ORGANIC CHEMISTRY
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Sulfonation of oils
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Patent number 4,226,805
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Issue date Oct 7, 1980
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Witco Chemical Corporation
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Oscar W. Bauer
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C07 - ORGANIC CHEMISTRY
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Petroleum sulfonates
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Patent number 4,177,207
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Issue date Dec 4, 1979
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Stepan Chemical Company
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Marvin L. Nussbaum
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C07 - ORGANIC CHEMISTRY
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Process for sulfonation
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Patent number 4,148,821
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Issue date Apr 10, 1979
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Stepan Chemical Company
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Marvin L. Nussbaum
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C07 - ORGANIC CHEMISTRY
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3798261
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Patent number 3,798,261
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Issue date Mar 19, 1974
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C07 - ORGANIC CHEMISTRY
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3591498
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Patent number 3,591,498
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Issue date Jul 6, 1971
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C07 - ORGANIC CHEMISTRY
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3445388
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Patent number 3,445,388
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Issue date May 20, 1969
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C07 - ORGANIC CHEMISTRY
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3374210
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Patent number 3,374,210
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Issue date Mar 19, 1968
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C07 - ORGANIC CHEMISTRY
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3288762
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Patent number 3,288,762
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Issue date Nov 29, 1966
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C07 - ORGANIC CHEMISTRY