US PATENT SUBCLASS 435 / 1.1
DIFFERENTIATED TISSUE OR ORGAN OTHER THAN BLOOD, PER SE, OR DIFFERENTIATED TISSUE OR ORGAN MAINTAINING; COMPOSITION THEREFOR

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

1.1DIFFERENTIATED TISSUE OR ORGAN OTHER THAN BLOOD, PER SE, OR DIFFERENTIATED TISSUE OR ORGAN MAINTAINING; COMPOSITION THEREFOR {2}
1.2  DF  .~> Including perfusion; composition therefor
1.3  DF  .~> Including freezing; composition therefor

DEFINITION

Classification: 435/1.1

DIFFERENTIATED TISSUE OR ORGAN OTHER THAN BLOOD, PER SE, OR DIFFERENTIATED TISSUE OR ORGAN MAINTAINING; COMPOSITION THEREFOR:

(under the class definition) Processes or compositions for the maintenance of a differentiated tissue or organ, or the differentiated tissue or organ, per se.

(1) Note. Maintenance includes keeping an organ under conditions in which it produces a product (e.g., hormone, etc.) which is later recovered.

(2) Note. Tissue is presumed to be undifferentiated in the

absence of a clear showing to the contrary. The fact that a tissue continues to produce hormones, etc., is to be taken as an indication that the tissue retains its differentiation.

(3) Note. For a process to be classified in this subclass, the organ must be maintained in a viable state (e.g., in a nutrient or life sustaining media) and the tissue must contain an integral membrane. Thus, the preservation of blood plasma provided for in subclass 2 is excluded from this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

235.1+, for virus culture and treatment.

325+, for animal cells, per se, and compositions thereof; processes of propagating, maintaining, preserving, isolating, etc. animal cells or compositions; culture media therefore. SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids, for methods of preserving by freeze drying.

62, Refrigeration, for methods of cooling.

623, Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor, appropriate subclasses for implantable living glands encapsulated in a porous membrane.