US PATENT SUBCLASS 435 / 40.52
.~.~ Involving tissue sections

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

4  DF  MEASURING OR TESTING PROCESS INVOLVING ENZYMES OR MICRO-ORGANISMS; COMPOSITION OR TEST STRIP THEREFORE; PROCESSES OF FORMING SUCH COMPOSITION OR TEST STRIP {15}
40.5  DF  .~ Involving fixed or stabilized, nonliving microorganism, cell, or tissue (e.g., processes of staining, stabilizing, dehydrating, etc.; compositions used therefore, etc.) {2}
40.52.~.~ Involving tissue sections

DEFINITION

Classification: 435/40.52

Involving tissue sections:

(under subclass 40.5) Subject matter wherein the fixed or stabilized, nonliving tissue is in the form of a tissue section.

(1) Note. Since tissues and organs are usually too thick for microscopic study, techniques have been developed which result in thin, translucent sections. Therefore, for the purpose of this subclass, tissue sections are tissues which have been sliced so that they may be microscopically observed.

(2) Note. Included in this subclass are all stages of tissue processing in the preparation for and examination of tissue sections, e.g., fixation, dehydration, embedding, sectioning, etc.