US PATENT SUBCLASS 435 / 40.5
.~ Involving fixed or stabilized, nonliving microorganism, cell, or tissue (e.g., processes of staining, stabilizing, dehydrating, etc.; compositions used therefore, etc.)

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.~ Involving fixed or stabilized, nonliving microorganism, cell, or tissue (e.g., processes of staining, stabilizing, dehydrating, etc.; compositions used therefore, etc.) {2}
40.51  DF  .~.~> Involving a monolayer, smear or suspension of microorganisms or cells
40.52  DF  .~.~> Involving tissue sections

DEFINITION

Classification: 435/40.5

Involving fixed or stabilized, nonliving microorganism, cell, or tissue (e.g., processes of staining, stabilizing, dehydrating, etc.; compositions used therefore, etc.):

(under subclass 4) Subject where the material to be tested contains fixed or stabilized, nonliving microorganisms, cells, or tissues or the agent used for the measurement or test contains fixed or stabilized, nonliving microorganisms, cells, or tissues.

(1) Note. If there is no clear disclosure as to whether the microorganism or cell is nonliving or viable, it shall be presumed to be viable and therefore appropriate for this class, subclasses 29+. However, due to the uncertainty of the viability of the microorganism or cell, placement of a cross reference in this or the indented subclasses is strongly recommended.

(2) Note. This and the indented subclasses are intended to take compositions used to aid in the microscopic study (e.g., light, scanning or transmission electron microscopy, etc.) of microorganisms, cells, and tissues such as those used for staining, clarifying, firming, fixing, or dehydrating a microorganism, cell, or tissue for microscopic examination as well as the methods for preparing the microorganisms, cells, and tissues for examination and the processes of examining them not specifically provided for elsewhere.

(3) Note. Fixation or stabilization of the microorganisms, cells, or tissues on a slide may involve merely air drying rather than a chemical fixation process.

(4) Note. Subject matter involving the staining of microorganisms, cells, or tissues specifically and only for nucleic acid (e.g., DNA or RNA, etc.) with stains such as Feulgen stain or acridine orange is proper for this class, subclass 6. Subject matter involving microorganisms, cells, or tissues stained with a composition providing contrasting stains for the cell nucleus and cytoplasm (e.g., hematoxylin, eosin, etc.) is proper for this or the indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

6, for measuring or testing processes or compositions therefore involving nucleic acid, nucleotide, or nucleoside which includes processes of staining microorganisms, cells, or tissues via in situ nucleic acid hybridization. 7.1+, for test methods or compositions therefore involving the staining of microorganisms, cells, or tissue with labelled antibodies, ligands, or receptors.

14+, for test methods or compositions therefore involving the staining of microorganisms, cells, or tissues for endogenous enzyme activity.

29+, for test methods or compositions therefore involving the staining of microorganisms, cells, or tissues with vital stains; methods or compositions involving the microscopic observation of live microorganisms or cells; methods or compositions involving the counting of intact, live microorganisms or cells not provided for elsewhere.

SEE OR SEARCH CLASS

8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers,

94.1+, for treatment of hides, skins, feathers and animal tissues, e.g., tanning, particularly subclass 94.11 pertaining to treatment of subcutaneous or internal tissues of animals, e.g., the production of sutures, racket strings, etc., from gut and various subclasses for compositions for dying materials of any kind which may contain a microorganism or enzyme.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture, appropriate subclass for a process of mounting a specimen by a lamination process which process may or may not include the step of staining, clarifying, firming or fixing the tissue; and

57, for the combination of coating a biological specimen and then interposing the coated specimen between glass plates.

250, Radiant Energy, for methods and apparatus for detecting radiant energy not classified elsewhere.

356, Optics: Measuring and Testing, for methods and apparatus for analyzing light, determining the optical or nonoptical properties of materials, measuring optically dimensions, determining optically spatial relations and inspecting optically for flaws and imperfections within the scope of this class and not otherwise classifiable. This includes visual counting of blood particles, etc. with a scale or spacer to aid the eye, counting and sizing particles with visible light by statistical analysis procedures rather than one by one numerical particle counting, etc.

359, Optics: Systems (Including communication) and Elements, for microscopes and microscope slides. 377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems, for a numerical counting means for counting and/or sizing discrete particles such as blood particles or bacteria colonies one at a time.

424, Drug, Bio-affecting and Body Treating Composition,

75, for an embalming and undertaking composition.

427, Coating Processes,

2+, for coating processes wherein a medical or dental product is produced and subclass 4 for processes of coating a plant member or animal specimen.

434, Education and Demonstration,

295+, for method, apparatus or product related to teaching and pertinent to biology and taxidermy, including models, cells, mounting and preserving means, processes and taxidermy devices.

436, Chemistry: Molecular Biology and Microbiology,

10, for particle count standards or controls such as platelet count standards; subclass 521 for fixed or stabilized red blood cells used as an insoluble carrier for immunochemicals (e.g., hemagglutination, etc.).