What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
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363-131 121-55A 14-.5
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Class Number: 507 Class Title: COMPOSITIONS OR METHODS OF PREPARATION OR MERE METHODS OF USING SAID COMPOSITIONS OR A COMPOUND: FOR EARTH BORING, ETC Subclass Subclass Number Title 90 COMPOSITION FOR PREVENTING CONTAMINANT DEPOSITS IN PETROLEUM OIL CONDUITS OR METHOD OF PREPARATION OR MERE METHOD OF USING SAID COMPOSITION OR A COMPOUND 100 EARTH BORING COMPOSITION OR METHOD OF PREPARATION OR MERE METHOD OF USING SAID COMPOSITION OR A COMPOUND 101 .Contains enzyme or living microorganism 102 .Contains intended gaseous component 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 a carbon-fluorine bond 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.) 109 ....With metal compound other than an alkali or alkaline earth metal compound (e.g., Al, Cr, Fe, Mn, Cu, etc.) 110 ..Organic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, xanthan, etc.) or ester of an alcohol which has five or more hydroxy groups 111 ...Carbohydrate is starch, modified starch, or derivative thereof 112 ...Carbohydrate is cellulose or derivative thereof 113 ....Carboxyalkylcellulose (e.g., CMC, CMHEC, etc.) 114 ....Hydroxyalkylcellulose (e.g., HEC, etc.) 115 ...Carbohydrate is hydroxyalkyl ether derivative (e.g., HPG, etc.) 116 ...Ester is higher fatty or carbocyclic acid ester (e.g., sorbitan oleate, etc.) 117 ..Organic component is solid synthetic organic resin 118 ...Resin is polymer derived from ethylenic monomers only (e.g., maleic, itaconic, etc.) 119 ....Polymer contains (alk)acrylic monomer 120 .....(Alk)acrylic monomer contains nitrogen covalently bound to an ethylenic moiety (e.g., acrylamide, acrylonitrile, etc.) 121 ......(Alk)acrylic monomer contains nitrogen and sulfur covalently bound to an ethylenic moiety 122 ....Polymer derived from monomer containing sulfur covalently bound to an ethylenic moiety 123 ....Polymer derived from monomer having hetero nitrogen ring covalently bound to an ethylenic moiety 124 ....Polymer contains vinyl alcohol unit 125 ....Polymer derived from monomer containing carbocyclic ring covalently bound to an ethylenic moiety (e.g., styrene, vinyl toluene, etc.) 126 ..Organic component is asphalt or a component or derivativee thereof 127 ..Organic component contains covalently bound silicon 128 ..Organic component contains covalently bound phosphorous 129 ..Organic component contains covalently bound nitrogen 130 ...Nitrogen is part of hetero ring 131 ...Organic component contains covalently bound nitrogen and covalently bound oxygen 132 ....Organic component contains direct covalent nitrogen-oxygen bond (e.g., nitroaromatic, amineoxide, etc.) 133 ....Organic component contains covalently bound nitrogen and ether linkage 134 ..Organic component contains covalently bound sulfur 135 ...Organic component contains direct covalent carbon-sulfur bond (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 141 ..Inorganic component contains soluble potassium salt 142 ..Inorganic component contains phosphorous 143 ..Inorganic component is metal or alloy 144 ..Inorganic component is asbestos 145 ..Inorganic component is soluble in boring medium * *************************************** * CROSS REFERENCE ART COLLECTION RELATING TO SUBCLASSES 100-145 * *************************************** 901 ORGANICALLY MODIFIED INORGANIC SOLID 902 CONTROLLED RELEASE AGENT 903 CROSSLINKED RESIN OR POLYMER 904 PROCESS OF MAKING FLUIDS OR ADDITIVES THEREFOR 905 NONTOXIC COMPOSITION 906 SOLID INORGANIC ADDITIVE IN DEFINED PHYSICAL FORM 907 INDICATING MEANS (E.G., DYE, FLUORESCING AGENT, ETC.) 910 EARTH BORING FLUID DEVOID OF DISCRETE AQUEOUS PHASE