US PATENT SUBCLASS 427 / 2.13
.~.~ Layer formed contains chemical reagent or chemically reacts with substrate (e.g., cell stain or fix, pH paper, immobilized antigen)

Current as of: June, 1999
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427 /   HD   COATING PROCESSES

2.1  DF  MEDICAL OR DENTAL PURPOSE PRODUCT; PARTS; SUBCOMBINATIONS; INTERMEDIATES (E.G., BALLOON CATHETER, SPLINT) {7}
2.11  DF  .~ Analysis, diagnosis, measuring, or testing product (e.g., specimen preparation, microscope slide smearing) {2}
2.13.~.~ Layer formed contains chemical reagent or chemically reacts with substrate (e.g., cell stain or fix, pH paper, immobilized antigen)

DEFINITION

Classification: 427/2.13

Layer formed contains chemical reagent or chemically reacts with substrate (e.g., cell stain or fix, pH paper, immobilized antigen):

(under subclass 2.11) Processes in which the layer formed contains or is intended to receive a chemical reagent which causes or participates in a chemical reaction in order to accomplish its analysis, diagnosis, measurement, or test function; parts, subcombinations, or intermediates thereof or therefor.

(1) Note. A chemical reaction here includes covalent bonding, ionic bonding, complexing, ion exchange, and ligand bonding. Not included here are bonds which are no stronger than hydrogen bonding.

(2) Note. Coating a microscope slide with a stain or with a specimen to be stained or staining a specimen are proper for placement here.

(3) Note. Coating with a chemical reagent which does not primarily participate in an analysis, diagnosis, measurement, or test function is not proper for placement in this subclass (on that basis); thus, coating a microscope slide with heparin would be placed in subclass 2.11.

SEE OR SEARCH CLASS

424, Drug, Bio-Affecting and Body Treating Compositions, and for compositions for preparing micro-organisms, cells or tissues for microscopic examination and processes of applying said compositions to the micro-organisms, cells, or tissues to be examined.

435, Chemistry: Molecular Biology and Microbiology, for processes having a significant or nonsignificant coating step and otherwise proper for Class 427; see 4+, for processes of making measurement or test compositions, strips, or films; subclasses 174+ for processes of making carrier-bond or immobilized enzyme or microbial cell such as within a polymer or gel or absorbed on a resin; subclasses 183+ for methods of making a modified or stabilized enzyme or composition thereof (other than immobilized); and subclasses 243+ for methods of making a composition containing a micro-organism. When there are only generic claims and multiply disclosed species or when there are equally comprehensive species claims and when the species are classifiable in Class 427 and in Class 435, placement of the original is in Class 435 with appropriate cross-references to Class 427.

436, Chemistry: Analytical and Immunological Testing, for in vitro processes of analysis involving a chemical reaction or an immunological binding interaction (including those which may involve a medical or dental purpose).