US PATENT SUBCLASS 48 / 127.7
.~.~ Catalytic

Current as of: June, 1999
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48 /   HD   GAS: HEATING AND ILLUMINATING

127.3  DF  METHANE (NATURAL GAS) -CONTAINING PRODUCT, OR TREATMENT OR RECOVERY PROCESS {1}
127.5  DF  .~ Process including chemical reaction {1}
127.7.~.~ Catalytic

DEFINITION

Classification: 48/127.7

Catalytic:

(under subclass 127.5) Subject matter which employs an extraneous accelerator or retarder for the reaction.

(1) Note. This subclass (127.7) serves as a collection place for cross-reference copies of patents wherein a methane-containing mixture is recovered from an enzyme-catalyzed reaction.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation,

603, for a process in which methane is collected incidental to sewage or other waste liquid treatment.

435, Chemistry: Molecular Biology and Microbiology,

167, for the manufacture of methane by fermentation, that is, bacterial or other enzyme-catalyzed synthesis.