US PATENT SUBCLASS 436 / 121
.~.~ Only hydrogen sulfide

Current as of: June, 1999
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436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

119  DF  SULFUR CONTAINING {3}
120  DF  .~ Organic or sulfhydryl containing (e.g., mercaptan, hydrogen, sulfide, etc.) {1}
121.~.~ Only hydrogen sulfide

DEFINITION

Classification: 436/121

Only hydrogen sulfide:

(under subclass 120) Subject matter in which the only test perferred for a sulfur compound is for hydrogen sulfide.

(1) Note. H2S can be in admixture with other gases but is the only gas detected or determined.