US PATENT SUBCLASS 252 / 62.51 R
MAGNETIC

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

62.51 RMAGNETIC {5}
62.52  DF  .~> Flaw detection or magnetic clutch
62.53  DF  .~> With wax, bitumen, resin, or gum {1}
62.55  DF  .~> Free metal or alloy containing
62.56  DF  .~> Iron-oxygen compound containing {5}
62.51 C  DF  .~> Chromium or chromium compound containing

Unofficial Alpha Subclasses: R C

DEFINITION

Classification: 252/62.51

(under the class definition) Compositions disclosed to be useful for magnetic purposes as well as compositions and processes for making same.

(1) Note. This subclass takes processes of preparing magnetic compositions and the compositions resulting therefrom, as well as such processes followed by a magnetizing and/or broad molding step. It also takes any combination of these steps with a heat treating operation except where the heat treatment modifies a magnetic property of a metallic component which is intentionally present in the composition.

(2) Note. This subclass includes magnetic articles claimed in terms of the composition from which it is made, when said articles do not contain sufficient structural limitations to classify them elsewhere.

(3) Note. In some instances it is difficult to tell whether a fused mixture of oxides (e.g., ferrites) is a compound or a composition. If a claim of this type is restricted to atoms combined in definite, whole number ratios, the product is considered a compound. However, a patent not so limited; e.g., if the ratios of the elements are variable or "impurities" are intentionally present, is considered to be drawn to a composition classifiable in this or indented subclasses.

(4) Note. See section II, B, LINES WITH OTHER CLASSES AND WITHIN THIS CLASS in the Class Definition for this class (252), for a discussion of the lines between this subclass area and other classes.

SEE OR SEARCH CLASS 75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, appropriate subclasses for loose metal powder compositions and consolidated compositions having a random mixture of ingredients and a continuous phase of free metal, even when claimed as magnetic and/or nominally claimed as a rod, wire, strand, etc., especially

255+, for a composition of loose metal particles.

106, Compositions: Coating or Plastic, for strands, filaments and compositions distinguished solely by being made of plastic compositions (e.g., mixtures of metal powders and a plastic or coating composition). Such compositions are classified for the most part, in Class 106 in the subclasses entitled "With filler, dye or pigment". All magnetic compositions which would otherwise be classified in Class 106 are provided for in this subclass (62.51+) and its indents.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

209+, for magnets and subclasses 296+ for magnet structure, per se. See subclass 284 for magnetizing and demagnetizing apparatus.

360, Dynamic Magnetic Information Storage or Retrieval,

131+, for magnetic records claimed in terms of significant structure. Note that merely claiming the record as a wire, filament, rod, ribbon, strand or record, or no more structure than one or more coatings on a base is not significant structure under the definition of 360-131+.

419, Powder Metallurgy Processes, appropriate subclasses, especially

61+, for processes for making articles, which may be magnetic, from metal containing powders using pressure but no heat; and subclasses 1+ for similar process involving use of heat.

420, Alloys or Metallic Compositions, appropriate subclasses for a single elemental metal and for an alloy or metallic composition defined only as "magnetic", "magnetized" or "permanent magnet" or alloys or metallic composition claimed, per se, which are inherently magnetic.

423, Chemistry of Inorganic Compounds, for magnetic inorganic compounds, per se. 427, Coating Processes,

127+, for coating processes, per se, including a magnetic base or coating.

428, Stock Material or Miscellaneous Articles,

544+, for stock material which is all metal or has adjacent metal components, even though claimed as being formed of magnetic material, particularly subclasses 548+ for sintered composite metal stock, subclass 611 for stock material having its magnetic properties coordinated with its shape, subclasses 681+ for a metallic composite which has an iron-base component, and subclass 928 for metallic stock distinguished by magnetic properties. See the main Class Definition of Class 428, Lines With Other Classes, "Compounds and Compositions" for the distinction between a composition and a stock material.

520, Synthetic Resins or Natural Rubbers, for compositions containing a synthetic resin or natural rubbers and comminuted metal. All magnetic compositions which would be classified in the Class 520 area are provided for by this subclass (62.51+).

523, Synthetic Resins or Natural Rubbers,

181, for a composition devoid of a magnetic material but

which is designed to contain same.