| | CLASS NOTES |
| 1 | DF | HAVING FOREIGN OR DIVERSE FUNCTION (E.G., PREVENT CORROSION, ETC.) {1} |
| 3 | DF | TO BE USED AS A MELT |
| 4 | DF | IN FORM OF A MEMBRANE |
| 5 | DF | IRRADIATION BY, OR APPLICATION OF, ELECTRICAL, MAGNETIC OR WAVE ENERGY |
| 6 | DF | CONTROL RESPONSIVE TO SENSED CONDITION |
| 7 | DF | BIOSPECIFIC MATERIAL, OR PRODUCED BY ENZYME OR MICROORGANISM |
| 8 | DF | FORMING OR TREATING A SPHERE, PROCESS ONLY {2} |
| 11 | DF | INCLUDING ION EXCHANGING, EXCEPT ZEOLITES OR PRODUCT THEREOF {1} |
| 20 | DF | REGENERATING OR REHABILITATING CATALYST OR SORBENT {4} |
| 60 | DF | ZEOLITE OR CLAY, INCLUDING GALLIUM ANALOGS {13} |
| 100 | DF | CATALYST OR PRECURSOR THEREFOR {12} |
| 400 | DF | SOLID SORBENT {6} |
| 439 | DF | MISCELLANEOUS (E.G., CARRIER OR SUPPORT PER SE OR PROCESS OF MAKING, ETC.) |
| | ****************************** |
| | CROSS-REFERENCE ART COLLECTIONS |
| | ****************************** |
| 500 | DF | STABILIZED {4} |
| 506 | DF | METHOD OF MAKING INORGANIC COMPOSITION UTILIZING ORGANIC COMPOUND (EXCEPT FORMIC, ACETIC, OR OXALIC ACID OR SALT THEREOF) {5} |
| 514 | DF | PROCESS APPLICABLE EITHER TO PREPARING OR TO REGENERATING OR TO REHABILITATING CATALYST OR SORBENT |
| 515 | DF | SPECIFIC CONTAMINANT REMOVAL {3} |
| 519 | DF | REAGENT GRADE (E.G., ULTRA PURE) |
| 520 | DF | SUPPRESSED SIDE REACTIONS |
| 521 | DF | METAL CONTAMINANT PASSIVATION |
| 522 | DF | RADIANT OR WAVE ENERGY ACTIVATED |
| 523 | DF | MISCELLANEOUS SPECIFIC TECHNIQUES OF GENERAL APPLICABILITY |
| 524 | DF | SPINEL |
| 525 | DF | PEROVSKITE |
| 526 | DF | SORBENT FOR FLUID STORAGE, OTHER THAN AN ALLOY FOR HYDROGEN STORAGE |
| 527.11 | DF | MONOLITH OF PECULIAR STRUCTURE OR PHYSICAL FORM, WITH SPECIFIED HEAT EXCHANGE CAPABILITY |
| 527.12 | DF | PLURAL LAYERS ON A SUPPORT, EACH LAYER HAVING A DISTINCT FUNCTION {1} |
| 527.14 | DF | SPECIFIED SUPPORT PARTICLES OF PECULIAR STRUCTURE OR PHYSICAL FORM (E.G., WHISKERS, FIBER PIECES, ETC.) {3} |
| 527.18 | DF | MONOLITH WITH SPECIFIED GAS FLOW PATTERNS (E.G., TURBULENT FLOW MONOLITH) |
| 527.19 | DF | MONOLITH WITH SPECIFIED SHAPE OR DIMENSION OF CELL OPENING (E.G., HONEYCOMB, RINGS, ETC.) {3} |
| 527.23 | DF | SPECIFIED EXTERNAL OR INTERNAL SHAPE OR CONFIGURATION OF CATALYST REACTOR OR OF SORBENT CONVERTER |
| 527.24 | DF | PECULIAR STRUCTURE OR PHYSICAL FORM (E.G., FOAM, SPONGE, FOIL, SACK, BAG, FIBER IN A MATRIX, MONOLITH, MICROSTRUCTURE (MICROCRACKING), MICROAGGREGATES, ETC.) |
