US Patent Class 208
MINERAL OILS: PROCESSES AND PRODUCTS-- Main Headings




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Current as of: June, 1999
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CLASS NOTES
1  DF  SYNTHETIC DRYING OILS
2  DF  PHENOLIC OR TOXIC OILS
3  DF  OXIDATION OF MINERAL OILS {2}
390  DF  TAR SAND TREATMENT WITH LIQUID {1}
400  DF  BY TREATMENT OF SOLID MINERAL, E.G., COAL LIQUEFACTION, ETC. {13}
12  DF  COLORNG TREATMENTS (INCLUDES FLUORESCENCE)
13  DF  TREATMENT OF REFINING SLUDGE
14  DF  PRODUCTS AND COMPOSITIONS {4}
24  DF  PARAFFIN WAX; TREATMENT OR RECOVERY {4}
39  DF  ASPHALTS, TARS, PITCHES AND RESINS; MAKING, TREATING AND RECOVERY {4}
46  DF  CHEMICAL CONVERSION OF HYDROCARBONS {11}
177  DF  REFINING {23}
308  DF  FRACTIONATION {5}
370  DF  MISCELLANEOUS
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CROSS-REFERENCE ART COLLECTIONS
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950  DF  PROCESSING OF "FISCHER-TROPSCH" CRUDE
951  DF  SOLID FEED TREATMENT WITH A GAS OTHER THAN AIR, HYDROGEN OR STEAM
952  DF  SOLID FEED TREATMENT UNDER SUPERCRITICAL CONDITIONS
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DIGESTS
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DIG 1  DF  Automatic control
DIG 2  DF  Molecular sieve