US PATENT SUBCLASS 252 / 570
FLUENT DIELECTRIC

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


252 /   HD   COMPOSITIONS

570FLUENT DIELECTRIC {7}
571  DF  .~> Gaseous or gas-containing
572  DF  .~> Metal- or insoluble component-containing; e.g., slurry, grease, etc.
573  DF  .~> Si-containing
574  DF  .~> B-, P-, S-, Se-, or Te-containing
575  DF  .~> N-containing {1}
578  DF  .~> O-containing {2}
581  DF  .~> Halogenated polycyclic compound-containing

DEFINITION

Classification: 252/570

FLUENT DIELECTRIC:

(under the class definition) Nonsolid claimed as a nonconductor of electricity.

(1) Note. A nonsolid is a material which, at ambient temperatures, does not hold its shape without confinement. Most solid nonmetal compositions ordinarily are electrical insulators and classification of such construction mateials on the basis of electrical properties has been found impractical; therefore, another way of defining "fluent" in this context is as any composition which cannot be accommodated in Class 106 or the Class 520 series. A mass of particulate solids is not considered fluent for purposes of this subclass, but a "slumpable" nonparticulate material, e.g., a grease, etc., is considered fluent.

(2) Note. Where a patent claims an electrical device containing a dielectric, the patent is classified with the device, no matter how nominal the recitation of the device may be.

SEE OR SEARCH THIS CLASS, SUBCLASS:

71+, for heat exchange, low-freezing or low-pour-point or hihg-boiling-point compositions, which compositions may have electrical insulating properties.

500+, for nonmetal compositions which, under some or all circumstances, conduct electricity, including electric "resistance" elements having a defined conductivity, even though the conductivity is small.

SEE OR SEARCH CLASS

106, Compositions: Coating or Plastic, for normally solid inorganic, organic nonresinous, and organic natural-resin solid materials, or materials which solidify upon "setting", whether described and/or claimed as electric insulators or not. 174, Electricity: Conductors and Insulators,

8+, for such subject matter which includes a fluid; subclasses 110+ for an insulated conductor, even when the conductor is only nominally claimed; and subclasses 137+ for a shaped insulator.

208, Mineral Oils, Processes and Products,

14, for electrically insulating compositions, consisting entirely of mineral oil components.

218, High-Voltage Switches With Arc Preventing and Extinguishing Devices,

89+, for such subject matter having an interposed nonconductor.

219, Electric Heating,

538+, for an insulated electric heating element.

264, Plastic and Nonmetallic Article Shaping or Treating: Processes, especially

56+, and 109+ for methods of making articles by uniting randomly associated particles.

313, Electric Lamp and Discharge Devices, appropriate subclasses for such devices containing an insulating material. 336, Inductor Devices, for electric voltage transformers of this type, especially

94, for such a device having fluid insulation.

338, Electrical Resistors, appropriate subclasses for such subject matter including a dielectric material.

361, Electricity: Electrical Systems and Devices,

301.1+, for a fixed capacitor (condenser) which may include a named dielectric.

501, Compositions: Ceramic, appropriate subclasses for ceramic compositions capable of functioning as an electrical insulator.

508, Solid Antifriction Devices, Materials Therefor, Lubricant and Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions, particularly

110+, for lubricants and miscellaneous compositions containing a mineral oil and a nonhydrocarbon additive, including compositions claimed as having both lubricating and electric insulating properties.

520, Synthetic Resins or Natural Rubbers, appropriate subclasses for a nonfluent composition containing a synthetic resin or natural rubber which composition has the property of insulating objects electrically from each other.

523, Synthetic Resins or Natural Rubbers,

173, for a synthetic resin or natural rubber composition having utility as a filling or flooding composition for cables or to processes of preparation thereof. 585, Chemistry of Hydrocarbon Compounds,

6.3+, for an "insulating oil" composition consisting only of hydrocarbons where at least one of the components is not a mineral oil.