| 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 44]](../as.gif) Class 44 | FUEL AND RELATED COMPOSITIONS |
| Click here for a printable version of this file | |
![[List of Patents for class 44 subclass 250]](../ps.gif) | 250 | FLAMELESS OR GLOWLESS |
| | 265 | SOLIDIFIED LIQUID (E.G., GEL, ETC.) |
| | 266 |  Liquid alkanol base |
| | 268 | Liquid hydrocarbon base (e.g., gasoline, etc.) |
| | 269 |  With plant derivative of unknown composition (except rosin or rosin derivatives) or carbohydrate |
| | 270 | With organic nitrogen compound |
| | 271 | With organic polymer polymerized through olefinic or acetylenic bond (e.g., methacrylate polymers, polypropylene, etc.) |
| | 272 | With organic -C(=X)X- compound, wherein the X's are the same or diverse chalcogens (e.g., aluminum carboxylates, rosin salts, etc.) |
| | 275 | CANDLE COMPOSITION |
| | 280 | SOLID CARBONACEOUS FUEL DISPERSED IN A LIQUID MEDIUM (E.G., DISPERSED COAL, COKE, CARBON POWDER, PEAT, ETC.) |
| | 300 | LIQUID FUELS (EXCLUDING FUELS THAT ARE EXCLUSIVELY MIXTURES OF LIQUID HYDROCARBONS) |
| | 301 | Emulsion fuel (e.g., water-gasoline emulsions, etc.) |
| | 303 | Oxo still bottoms containing (i.e., distillation residues from reaction product of carbon monoxide, hydrogen, and olefin) |
| | 304 | Organic compound of indeterminate structure which is a reaction product of an organic compound with sulfur halide or elemental sulfur containing |
| | 305 | Phosphosulfurized or phosphooxidized organic compound of indeterminate structure containing (i.e., reaction products of organic compounds with phosphorus sulfides or oxides) |
| | 306 | Rosin, tall oil, or derivatives thereof containing (except abietic acids or fatty acids derived therefrom) |
| | 307 | Plant or animal extract mixtures or extracts of indeterminate structure containing |
| | 309 | Organic oxidate of indeterminate composition containing (e.g., paraffin wax oxidate or petroleum oxidate, etc.) |
| | 311 | Sludge, pitch, tar, or tar distillate containing |
| | 312 | Quinone or anthraquinone containing (e.g., quinhydrone, benzoquinones, etc.) |
| | 313 | Carbohydrate containing |
| | 314 | Boron containing |
| | 315 | Phosphorus attached directly or indirectly to the boron |
| | 316 | Three carbons or three fluorines bonded directly to the boron |
| | 317 | Nitrogen attached directly or indirectly to the boron |
| | 318 | Three identical or diverse chalcogens bonded directly to the boron |
| | 320 | Silicon containing |
| | 321 | Free metal or alloy containing |
| | 322 | Containing acyclic oxygen single bonded to acyclic oxygen (i.e., peroxy compounds) |
| | 323 | Containing -X-N(=X) or -X-N(=X)(=X) bonded directly to carbon, wherein the X's are the same or diverse chalcogens (e.g., thionitrite esters, etc.) |
| | 327 | Organic azide compound, or organic compound having acyclic nitrogen double bonded to acyclic nitrogen (e.g., diazo compounds, etc.) |
| | 329 | Heterocyclic carbon compound containing a hetero ring having chalcogen or nitrogen as the only ring hetero atoms |
| | 330 | Compound of indeterminate structure prepared by reacting a heterocyclic compound of known structure |
| | 331 |  The heterocyclic compound reactant is a dicarboxylic acid anhydride (e.g., reaction product of succinic anhydride with a polyamine, etc.) |
| | 332 | The heterocyclic compound reactant is an oxirane (e.g., reaction product of epihalohydrin with amine, epoxide reactions, etc.) |
| | 333 | The hetero ring contains six members including nitrogen and carbon |
| | 334 | Chalcogen in the hetero ring |
| | 335 | Plural nitrogens in the hetero ring (e.g., piperazines, etc.) |
| | 337 | Polymer or copolymer of a vinyl pyridine |
| | 338 | Acyclic chalcogen or acyclic nitrogen bonded directly to ring carbon of the hetero ring |
| | 339 | The hetero ring is unsubstituted or hydrocarbyl substituted only, or salts thereof (e.g., pyridyl salicylate salts, isoquinoline, etc.) |
| | 340 | The hetero ring contains five members including nitrogen and carbon (e.g., pyrrolidones, porphines, etc.) |
| | 341 | Chalcogen in the hetero ring |
| | 342 | Plural nitrogens in the hetero ring (e.g., imidazolines, etc.) |
| | 343 |  At least three nitrogens in the hetero ring (e.g., triazoles, tetrazoles, etc.) |
| | 344 | Having -C(=X)-, wherein X is chalcogen or NH, attached indirectly to the hetero ring by nonionic bonding |
| | 345 | Carboxylic acid salt of the hetero ring compound, or a free carboxylic acid is present |
| | 346 | Polymeric or copolymeric compound having plural occurrences of the hetero ring (e.g., alpha-olefin maleimide copolymers, etc.) |
| | 347 | Acyclic chalcogen bonded directly to each carbon adjacent to the ring nitrogen (e.g., succinimides, etc.) |
| | 349 | The hetero ring contains six members including carbon and chalcogen (e.g., six-membered sorbitans, ketone peroxides, etc.) |
| | 350 | The hetero ring contains five members including carbon and chalcogen |
| | 351 | Acyclic chalcogen bonded directly to ring carbon of the hetero ring (e.g., five-membered lactones, anhydrides, sorbitans, etc.) |
| | 352 | Ring carbons of the hetero ring are unsubstituted or hydrocarbyl substituted only |
| | 353 | The hetero ring contains three or four members |
| | 354 | Aluminum or heavy metal, other than lead, containing |
| | 355 | Inorganic metal carbonyl compound (e.g., iron carbonyl, etc.) |
| | 357 | Inorganic compound of Zr, Cr, Cu, Zn, or Ni |
| | 358 | Organic compound containing the heavy metal or aluminum |
| | 359 | Metal carbonyl compound (e.g., cyclopentadienyl manganese tricarbonyl, etc.) |
| | 360 | Substituted or unsubstituted cyclopentadienyl manganese tricarbonyl, with an organic compound having -C(=O)O- not bonded to heavy metal or aluminum etc.) |
| | 361 | Five-membered, unsaturated carbocycle bonded directly to the heavy metal or aluminum (e.g., ferrocene, etc.) |
| | 362 | Heavy metal or aluminum complex of compounds having two -C(=X)- groups, wherein X is chalcogen, bonded to the same carbon, or enols thereof (e.g., iron acetylacetonate, etc.) |
| | 363 | Heavy metal or aluminum carboxylate salt or complex |
| | 365 | Heavy metal or aluminum sulfonate salt or complex |
| | 366 | Heavy metal or aluminum salt of organic phosphorus acid |
| | 367 | Nitrogen bonded directly or indirectly to the heavy metal or aluminum |
| | 368 | Organic compound containing arsenic, antimony, or bismuth |
| | 369 | Containing -O-S(=O)(=O)O- or -O-S(=O)O- attached directly or indirectly to carbon by nonionic bonding (e.g., sulfate esters, sulfite esters, etc.) |
| | 370 | Containing organic -S(=O)(=O)O- compound (i.e., sulfonates) |
| | 371 | Nitrogen or -C(=X)-, wherein X is chalcogen, attached indirectly to the sulfonate group by nonionic bonding |
| | 372 | Hydrazine or organic nitrogen compound salts of sulfonic acids |
| | 373 | Overbased sulfonate or carbonated alkaline earth metal sulfonate |
| | 374 | With organic -C(=O)O- compound (e.g., carboxylic acids, esters, etc.) |
| | 375 | Containing compound having phosphorus bonded directly to chalcogen and directly or indirectly to carbon by nonionic bonding (e.g., alkyl acid phosphates, etc.) |
| | 376 | Nitrogen attached to the phosphorus directly or indirectly by acyclic nonionic bonding |
| | 378 | Carbon bonded directly to the phosphorus |
| | 379 | Chalcogen or halogen attached indirectly to the phosphorus by acyclic nonionic bonding |
| | 380 | Organic nitrogen compound salt of organic phosphorus acids |
| | 382 | Phosphorus triester |
| | 383 | Containing organic -C(=X)X- compound, wherein the X's are the same or diverse chalcogens, with at least one X being sulfur |
| | 384 | Organic compound containing -NC or -CN group |
| | 385 | Containing organic -C(=O)O- compound (e.g., fatty acids, etc.) |