US PATENT SUBCLASS 585 / 857
.~.~.~ S dioxide, sulfolane, or sulfolene
Current as of:
June, 1999
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585 /
HD
CHEMISTRY OF HYDROCARBON COMPOUNDS
800
DF
PURIFICATION, SEPARATION, OR RECOVERY
{7}
833
DF
.~ By addition of extraneous agent, e.g., solvent, etc. {15}
856
DF
.~.~ S containing {2}
857
.~.~.~ S dioxide, sulfolane, or sulfolene
DEFINITION
Classification: 585/857
S dioxide, sulfolane, or sulfolene:
(under subclass 856) Subject matter wherein an agent is one of the sulfur-oxygen compounds, sulfur dioxide (SO
2
), sulfolane (tetrahydrothiophene-1, 1-dioxide (Fig 1) or sulfolene (dihydrothiophene-1, 1-dioxide (Fig. 2) [figure] [caption]FIGURE 1 [figure] [caption]FIGURE 2