PREVENTING CONTAMINANT DEPOSITS IN PETROLEUM OIL CONDUITS:
(under the class definition) Composition specialized and designed for addition to petroleum oils during transportation through conduits to prevent fouling or clogging of the conduits due to components of the petroleum oils precipitating out during the transportation, or method of preparation, or mere method of use of said composition or a compound for the purposes mentioned above.
(1) Note. This subclass also includes those processes of treating the oils during transportation with nonmineral oil additives which are distinguished by the composition employed and do not include any significant manipulative steps. The
broad steps of introducing the additives and using pressure or other means recited by name only to continue conveyance of the oil through the conduit will not take the patent out of the scope of this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
901, and 902-910, for Art Collections pertaining to subclasses 90-145.
SEE OR SEARCH CLASS
44, Fuel and Related Compositions, appropriate subclasses for processes of treating fuel oils to prevent corrosion of pipelines used to transport such fuel oils.
137, Fluid Handling, 13, for miscellaneous processes of handling materials in flow lines wherein flow of the fluent material is facilitated by the addition of material which affects the flow characteristics of the fluent material or by the application of heat or other forms of energy.
208, Mineral Oils: Processes and Products,
47, for processes of preventing corrosion of the equipment during chemical conversion of mineral oils, subclasses 177+ for processes of preventing corrosion of equipment by refining the mineral oil to remove impurities which may cause such corrosion, and subclass 370 for miscellaneous treatments of mineral oils during transportation through conduits.
252, Compositions,
387+, for an anti-corrosion composition of general utility.
508, Solid Antifriction Devices, Materials Therefor, Lubricant and Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions,
110+, for mineral lubricating oil compositions which contain additives for preventing corrosion of the pipe lines during transportation of the oil.
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,
31+, for colloid systems of colloid-sized solid or semisolid phase dispersed in primarily organic continuous liquid phase, subclasses 38+ for colloid systems of colloid-sized bituminous, coal, or Carbon phase dispersed in aqueous continuous liquid phase, subclasses 77+ for colloid systems of colloid-sized solid phase dispersed in aqueous continuous liquid phase; or agents for such systems or making or stabilizing (including preventing settling, suspending
agents, antiflocculants) such systems or agents; in each instance, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.
