US PATENT SUBCLASS 435 / 295.1
.~.~ Including a draft tube for agitation

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

283.1  DF  APPARATUS {9}
289.1  DF  .~ Bioreactor {16}
295.1.~.~ Including a draft tube for agitation {2}
295.2  DF  .~.~.~> Airlift bioreactor
295.3  DF  .~.~.~> Including a semi-permeable membrane or filter

DEFINITION

Classification: 435/295.1

Including a draft tube for agitation:

(under subclass 289.1) Apparatus including a tubular element extending from a lower to a higher level in a vessel to provide for internal mixing.

(1) Note. Draft tubes are used to facilitate circulation of a fluid within a bioreactor for the purpose of mixing. Separate means, such as an impeller or gas bubbles, are required to drive the fluid.

(2) Note. An example of structures provided for herein is: [figure]

SEE OR SEARCH CLASS

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, particularly

227, for chemical reactors including a draft tube.