| | CLASS NOTES |
| 250 | DF | FLAMELESS OR GLOWLESS {1} |
| 265 | DF | SOLIDIFIED LIQUID (E.G., GEL, ETC.) {2} |
| 275 | DF | CANDLE COMPOSITION |
| 280 | DF | SOLID CARBONACEOUS FUEL DISPERSED IN A LIQUID MEDIUM (E.G., DISPERSED COAL, COKE, CARBON POWDER, PEAT, ETC.) {1} |
| 300 | DF | LIQUID FUELS (EXCLUDING FUELS THAT ARE EXCLUSIVELY MIXTURES OF LIQUID HYDROCARBONS) {31} |
| 490 | DF | PEAT {2} |
| 500 | DF | PARTICULATE (E.G., POWDERED, ETC.) {5} |
| 506 | DF | COMBINED WITH FRICTION IGNITING MASS OR SURFACE {1} |
| 511 | DF | MATCH SPLINT OR STICK {1} |
| 519 | DF | PROVIDED WITH WICK OR FUSE |
| 520 | DF | FUEL PRODUCT HAVING PASSAGEWAY FOR GAS {2} |
| 530 | DF | FUEL PRODUCT OF DEFINED SHAPE OR STRUCTURE {3} |
| 540 | DF | WITH INCOMBUSTIBLE CARRIER (E.G., TORCH, ETC.) |
| 541 | DF | BUNDLED, COVERED OR WRAPPED |
| 542 | DF | COATED OR IMPREGNATED FOR EASIER IGNITION {3} |
| 550 | DF | CONSOLIDATED SOLIDS (E.G., BRIQUETTE, ETC.) {5} |
| 600 | DF | WITH APPEARANCE MODIFYING ADDITIVE OR TREATMENT |
| 601 | DF | WITH ANTIFREEZING ADDITIVE OR TREATMENT |
| 602 | DF | WITH ANTIDUSTING ADDITIVE |
| 603 | DF | WITH COMBUSTION IMPROVER {1} |
| 605 | DF | FROM VEGETATION OR REFUSE {1} |
| 607 | DF | CARBONIZED COMPONENT (E.G., COKE, ETC.) |
| 608 | DF | "LOW-RANK" COAL (E.G., LIGNITE, ETC.) |
| 620 | DF | COAL TREATING PROCESS OR PRODUCT THEREOF {1} |
| 628 | DF | MISCELLANEOUS FUEL COMPOSITION |
| 629 | DF | APPARATUS FOR MAKING OR TREATING FUEL COMPOSITION {3} |
| 640 | DF | WALL DEPOSIT PREVENTING OR REMOVING COMPOSITION (E.G., SOOT REMOVAL, ETC.) |
| 641 | DF | SOLID FUEL COMBUSTION IMPROVING COMPOSITION |
| 642 | DF | FLAME COLORANT COMPOSITION |
| 643 | DF | MATCH SCRATCHER COMPOSITION OR STRUCTURE |
| | ****************************** |
| | CROSS-REFERENCE ART COLLECTIONS |
| | ****************************** |
| 901 | DF | FUEL COMBINED WITH MATERIAL TO BE HEATED {1} |
| 903 | DF | METHOD INCLUDING MEASURING, TESTING OR AUTOMATIC CONTROL |
| 904 | DF | METHOD INVOLVING ELECTRIC OR WAVE ENERGY |
| 905 | DF | METHOD INVOLVING ADDED CATALYST |
