US PATENT SUBCLASS 44 / 454
.~ Lead-containing organic compound

Current as of: June, 1999
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44 /   HD   FUEL AND RELATED COMPOSITIONS

300  DF  LIQUID FUELS (EXCLUDING FUELS THAT ARE EXCLUSIVELY MIXTURES OF LIQUID HYDROCARBONS) {31}
454.~ Lead-containing organic compound {1}
455  DF  .~.~> With inorganic additive

DEFINITION

Classification: 44/454

Lead-containing organic compound:

(under subclass 300) Compositions which contain compounds in which lead is attached directly or indirectly to carbon of an organic compound.

(1) Note. See Glossary in the class definition for the definition of "organic compound".

(2) Note. Examples of ingredients provided for herein are tetraethyl lead, tetraphenyl lead, and tetramethyl lead.

(3) Note. Ingredients containing both a functional group, previously provided for, and lead in the same compound are

classified with the functional group previously provided for. See the search notes in subclass 354.