US PATENT SUBCLASS 523 / 181
.~.~ Composition devoid of magnetic materials and suitable for preparation of magnetic tape recording or process of preparing

Current as of: June, 1999
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523 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71}
181.~.~ Composition devoid of magnetic materials and suitable for preparation of magnetic tape recording or process of preparing

DEFINITION

Classification: 523/181

Composition devoid of magnetic materials and suitable for preparation of magnetic tape recording or process of preparing:

(under subclass 1) Subject matter wherein a composition having utility as a magnetic-tape recording composition is claimed or solely disclosed or to processes of preparation thereof.

(1) Note. For an explanation of patent placement referring to claimed or solely disclosed, see (in the class definition) the section of SEARCH THIS CLASS, SUBCLASS that refers to this subclass.

(2) Note. A "magnetic-tape recording composition" is defined to be a composition for magnetic purposes and contains a synthetic resin but does not contain a magnetic material.

(3) Note. A composition which is not solely disclosed to be used in the preparation of a magnetic tape is placed as appropriate in Classes 523 and 524 hereinbelow.

SEE OR SEARCH CLASS

148, Metal Treatment,

100+, for a process of altering the magnetic property of a material which has at least one free metal or alloy component.

252, Compositions, 62.51+, for a composition containing a synthetic resin and a magnetic material.

427, Coating Processes,

502, 548, and 599 for a process of utilizing a magnetic force or field to form a magnetic recording device or medium; and subclasses 127+ for a process of wherein the base or the coating is disclosed as having magnetic properties.