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
that is, no embedded spaces, class and subclass seperated by a dash, and any
subclass letters capitalized. Currently Design Patent titles (those in the
classes of the form Dxx.yy) are not retreivable.
Class Number: 196 Class Title: MINERAL OILS: APPARATUS Subclass Subclass Number Title 14.5 DEWAXING 14.52 SOLVENT EXTRACTION 46 REFINING 46.1 .With filtration 98 COMBINED VAPORIZING AND CONDENSING 99 .Condensate returned to vaporizer 100 ..Columns 102 .Condenser or collector in vaporizer 103 .Heads 104 VAPORIZING 105 .Systems 106 ..Series stills 107 .Tube and drum 108 ..Cyclic circulation 109 ...Drum above tube 110 .Tubular 111 .With partitions 112 .Rotary 114 .Vacuum 115 .Special shapes 116 .Furnaces and flues 117 ..Internal flues 118 .Liquid baths 119 .Jackets 120 .Special means for heating 121 ..Electric 122 .Carbon removers 123 .Circulators or agitators 124 ..Mechanical 125 ..Baffles 126 ..Fluid injectors 127 .Fluid injectors 128 .Films or sprays 129 .Depending legs or spur tubes 130 ..Bottoms 131 ..Unheated 132 .Automatic control 133 .Special features of construction 134 .Heat recovery from vapor or residuum 135 .Feeders 136 .Vapor outlets 137 .Attachments 138 CONDENSING 139 .Dephlegmators or fractionating columns 140 .Contact with cooling fluid 141 .Automatically controlled temperature 155 MISCELLANEOUS