US PATENT SUBCLASS 435 / 123
.~.~ Oxygen as only ring hetero atom

Current as of: June, 1999
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435 /   HD   CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY

41  DF  MICRO-ORGANISM, TISSUE CELL CULTURE OR ENZYME USING PROCESS TO SYNTHESIZE A DESIRED CHEMICAL COMPOUND OR COMPOSITION {26}
117  DF  .~ Preparing heterocyclic carbon compound having only O, N, S, Se, or Te as ring hetero atoms {4}
123.~.~ Oxygen as only ring hetero atom {3}
124  DF  .~.~.~> Containing a hetero ring of at least seven ring members (e.g., zearalenone, macrocyclic lactones, etc.)
125  DF  .~.~.~> Containing six-membered hetero ring (e.g., fluorescein, etc.)
126  DF  .~.~.~> Containing five-membered hetero ring (e.g., griseofulvin, etc.)

DEFINITION

Classification: 435/123

Oxygen as only ring hetero atom:

(under subclass 117) Processes wherein the product synthesized contains a hetero ring wherein oxygen is the only hetero atom.