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Class 585 :: CHEMISTRY OF HYDROCARBON COMPOUNDS

Definition

SUBJECT MATTER AND ORGANIZATION OF THIS CLASS

This class provides for a hydrocarbon compound in a pure or relatively pure state and for certain compositions containing hydrocarbons. Methods for making such compounds and compositions by synthesis, blending, etc., and certain methods for treating are also included herein. The scope of this class can be readily determined from a review of the "main line" subclasses of its schedule. These are arranged, in general, following the principles usually applied in the US Patent and Trademark Office for hierarchically ordering statutory subject matter, that is, more complex subject matter or that which exists later in time is generally placed ahead of simpler or earlier subject matter. As applied to chemistry and chemical engineering this ordering is generally as follows:

A. Materials defined by structure.

B. Compositions or mixtures

C. Compounds or elements

D. Manufacturing processes, e.g., synthesis, etc.

E. Nonmanufacturing processes, e.g., purification, etc.

F. Manufacturing apparatus

G. Nonmanufacturing apparatus

This class is confined to categories B, C, D, and E of the above list.

At the heart of this class is the pure compound which consists of carbon and hydrogen and no other element and which has a definite empirical formula and an unambiguous structural formula.

The major portion of patents in this class is drawn to processes for synthesizing such compound from other materials which are not this exact compound, with the intent of recovering the hydrocarbon compound.

Also included in this class, with some exceptions, is a mixture of hydrocarbon compounds, usually closely related in empirical and structural formulae, which mixture results from a single synthesis step, or a series of steps, which mixture is of utility as a mixture, e.g., a "detergent alkylate", a "polymer gasoline", etc. The exceptions are discussed below.

This class also includes, again with some exceptions, a composition which is a deliberate mixture of various hydrocarbons only, such as a fuel or lubricant composition, or a mixture of a hydrocarbon with a nonhydrocarbon material, which nonhydrocarbon material is designed to improve the general utility of the hydrocarbon. Thus, the nonhydrocarbon additive may be a solvent, a preservative, etc.

This class also provides, again with certain exceptions, for methods of manufacturing compounds and compositions classifiable herein and for certain methods of purifying the same or otherwise treating the same.

Class 585 :: CHEMISTRY OF HYDROCARBON COMPOUNDS

Definition

Subclasses List