| Patents > Guidance, Tools, and Manuals > Classification > Class Schedule |
|
|
|
| Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
|
| You are viewing a USPC Schedule. |
|
![[Search a list of Patent Appplications for class 122]](../as.gif) Class 122 | LIQUID HEATERS AND VAPORIZERS |
| Click here for a printable version of this file | |
![[List of Patents for class 122 subclass 1R]](../ps.gif) | 1R | PLANTS |
| | 4R | MISCELLANEOUS |
| | 5 | GAS-PRODUCER |
| | 5.51 | AIR-INJECTED |
| | 6R | INDUSTRIAL |
| | 6.5 |  Port |
| | 6.6 | Tuyeres |
| | 7R | Waste heat |
| | 8 | Water firebox |
| | 6A | Water-cooled walls |
| | 6B | Bosh plates |
| | 6C | Skew arch coolers |
| | 10 | FOR FLUID FUEL BURNER |
| | 11 | ROTARY |
| | 12 | ROTATABLY SUPPORTED |
| | 13.01 | STAND BOILER (E.G., WATER HEATER, ETC.) |
| | 13.3 | And delivery means to dispensing feature |
| | 14.1 | And condition responsive feature |
| | 14.2 |  Controls burner |
| | 14.21 |  By other than temperature of water |
| | 14.22 | By temperature of water in a water containing chamber or external tank |
| | 14.3 | Having water flow control feature |
| | 15.1 | Heated by liquid or steam (e.g., indirect heating, etc.) |
| | 16.1 | Solid fuel burner |
| | 17.1 | Fluid fuel burner |
| | 17.2 | Liquid fuel burner |
| | 18.1 | Having heat exchange feature |
| | 18.2 | Preheater |
| | 18.3 | Fire tube or flue surrounded by water containing chamber |
| | 18.4 | Water tube surrounded by burned fuel |
| | 18.5 | And external water tank |
| | 19.1 | Water containing chamber or external tank having circulation feature within |
| | 19.2 | And casing feature for stand boiler or external water tank therefor |
| | 20R | SUBSIDIARY |
| | 29 | ANNULAR FIREBOX |
| | 30 | MAGAZINE |
| INDIRECTLY HEATED |
| | 31.1 | INDIRECTLY HEATED SEPARATE INJECTED FLUID |
| | 35 | ACCUMULATOR |
| | 36 | AUXILIARY STEAM HEATER |
| | 37 | COMPARTMENT |
| | 39 | FILM |
| | 40 | FLASHER |
| | 42 | FIRE AND WATER TUBE |
| | 44.1 | FIRE TUBE |
| | 44.2 | With baffle in flue |
| | 49 | Horizontal and vertical |
| Horizontal or inclined |
| | 51 | Horizontal |
| | 52 | Plural |
| Central firebox |
| | 55 | Cylinder |
| Depending fire tube |
| Double water firebox |
| | 58R | Drop water firebox |
| | 59 | Circulation conduit |
| Double |
| | 61 | Drop water baffle |
| | 62 | Front and rear water baffle |
| | 63 | Front water baffle |
| | 64 | Interposed combustion chamber |
| | 65 | Rear water baffle |
| | 66 | Water coking chamber |
| Water grate |
| | 68 | Water tube |
| | 58FB | Fire box construction |
| | 72 | Projecting into firebox |
| Return and reverse |
| | 75 | Return fire tube |
| | 79 | Subjacent water arch |
| | 80 | Subjacent flue |
