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![[Search a list of Patent Appplications for class 507]](../as.gif) Class 507 | EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY |
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| This Class 507 is considered to be an integral part of Class 252 (see the Class 252 schedule for the position of this Class in schedule hierarchy). This Class retains all pertinent definitions and class lines of Class 252. | ||
![[List of Patents for class 507 subclass 90]](../ps.gif) | 90 | PREVENTING CONTAMINANT DEPOSITS IN PETROLEUM OIL CONDUITS |
| | 100 | EARTH BORING |
| | 101 |  Contains enzyme or living microorganism |
| | 102 | Contains intended gaseous phase at entry into wellbore |
| | 103 | Contains organic component |
| | 104 |  Organic component is cellular or fibrous material derived from plant or animal source (e.g., wood, nutshell, paper, leather, cotton, etc.) |
| | 105 | Organic component contains fluorine bonded directly to carbon |
| | 106 | Organic component is lignin or humate or derivative thereof (e.g., tannin, quebracho extract, etc.) |
| | 107 |  Humate component is fossilized (e.g., lignite, leonardite, brown coal, etc.) |
| | 108 | Lignin or humate component contains sulfur or is reacted with substance containing sulfur (e.g., lignosulfonate, etc.) |
| | 111 | Carbohydrate is starch or derivative thereof |
| | 112 | Carbohydrate is cellulose or derivative thereof |
| | 115 | Carbohydrate is hydroxyalkyl ether derivative (e.g., HPG, etc.) |
| | 116 | Ester is higher fatty or carboxylic acid ester (e.g., sorbitan oleate, etc.) |
| | 117 | Organic component is solid synthetic resin |
| | 118 | Resin is polymer derived from ethylenic monomers only (e.g., maleic, itaconic, etc.) |
| | 119 |  Polymer derived from acrylic acid monomer or derivative |
| | 120 |  Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.) |
| | 122 | Sulfur is attached directly or indirectly to the ethylenic monomer by nonionic bonding |
| | 123 | Hetero nitrogen ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding |
| | 124 | Polymer contains vinyl alcohol unit |
| | 125 | Carbocyclic ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding (e.g., styrene, vinyl toluene, etc.) |
| | 126 | Organic component is asphalt or a component or derivative thereof |
| | 127 | Organic component contains silicon attached directly or indirectly to carbon by nonionic bonding |
| | 128 | Organic component contains phosphorous attached directly or indirectly to carbon by nonionic bonding |
| | 129 | Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding |
| | 130 | Nitrogen is part of a hetero ring |
| | 131 | Oxygen is attached directly or indirectly to carbon by nonionic bonding |
| | 134 | Organic component contains sulfur attached directly or indirectly to carbon by nonionic bonding |
| | 135 | Organic component contains a sulfur attached directly to carbon by nonionic bonding (e.g., sulfonate, etc.) |
| | 136 | Organic component contains ether linkage (e.g., PEG ether, etc.) |
| | 137 | Organic component contains a carbocyclic group (e.g., cyclic alkyl, aromatic, tall oil, etc.) |
| | 138 | Organic component is a fat, fatty alcohol, fatty oil, ester-type wax, fatty still residue, or higher fatty acid or salt thereof |
| | 139 | Organic component contains an alcohol group |
| | 140 | Contains inorganic component other than water or clay |
| | 200 | WELL TREATING |
| | 201 | Contains enzyme or living micro-organism |
| | 202 | Contains intended gaseous phase at entry into wellbore |
| | 203 | Contains organic component |
| | 204 | Organic component is cellular or fibrous material derived from plant or animal source (e.g., wood, nutshell, paper, leather, cotton, etc.) |
| | 205 | Organic component contains fluorine bonded directly to carbon |
| | 206 | Organic component is lignin or humate or derivative thereof (e.g., tannin, quebracho extract, etc.) |
| | 207 | Lignin or humate component contains sulfur or is reacted with substance containing sulfur (e.g., lignosulfonate, etc.) |
| | 210 | Carbohydrate has been grafted onto solid synthetic resin |
| | 211 | Carbohydrate is polysaccharide |
| | 212 | Polysaccharide is starch or derivative thereof |
| | 213 | Polysaccharide is a xanthan (e.g., scleroglucans, etc.) |
| | 214 | Polysaccharide is cellulose or derivative thereof |
| | 217 | Polysaccharide is hydroxyalkyl ether derivative (e.g., HPG, etc.) |
| | 218 | Ester is higher fatty or carboxylic acid ester (e.g., sorbitan oleate, etc.) |
| | 219 | Organic component is solid synthetic resin |
| | 220 | Resin is polymer derived from phenolic and aldehydic monomers |
| | 221 | Resin is polymer derived from ethylenic monomers only (e.g., maleic, itaconic, etc.) |
| | 222 | Polymer derived from monomer having quaternary ammonium group |
| | 224 | Polymer derived from acrylic acid monomer or derivative |
| | 225 | Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.) |
| | 227 | Sulfur is attached directly or indirectly to the ethylenic monomer by nonionic bonding |
| | 229 | Hetero nitrogen ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding |
| | 230 | Polymer contains vinyl alcohol unit |
| | 231 | Carbocyclic ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding (e.g., styrene, vinyl toluene, etc.) |
| | 232 | Organic component is asphalt or a component or derivative thereof |
| | 233 | Organic component contains silicon attached directly or indirectly to carbon by nonionic bonding |
| | 235 | Organic component contains phosphorus attached directly or indirectly to carbon by nonionic bonding |
| | 236 | Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding |
| | 237 | Organic component contains a direct carbon to phosphorous nonionic bond (e.g., phosphonate, etc.) |
| | 238 | Organic component is a phosphate ester |
| | 239 | Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding |
| | 240 | Organic component is quaternary ammonium salt |
| | 241 | Organic component contains plural carboxylic acid, ester, or salt groups attached directly or indirectly to nitrogen by nonionic bonding |
| | 242 | Nitrogen is part of a hetero ring |
| | 244 | Oxygen is attached directly or indirectly to carbon by nonionic bonding |
| | 245 | Organic component contains a nitrogen attached directly to oxygen by nonionic bonding (e.g., nitroaromatic, amineoxide, etc.) |
| | 246 | Organic component contains an ether linkage |
| | 247 | Sulfur is attached directly or indirectly to carbon by nonionic bonding |
| | 248 | Organic component consists only of carbon, hydrogen, and nitrogen |
| | 252 | Organic component contains sulfur attached directly or indirectly to carbon by nonionic bonding |
