US PATENT SUBCLASS 523 / 161
.~.~ Invisible, ballpoint, or typewriter ink compositions or process of preparing; or composition for correction ribbons or correction fluids 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}
161.~.~ Invisible, ballpoint, or typewriter ink compositions or process of preparing; or composition for correction ribbons or correction fluids or process of preparing

DEFINITION

Classification: 523/161

Invisible, ballpoint, or typewriter ink compositions or process of preparing; or composition for correction ribbons or correction fluids or process of preparing:

(under subclass 1) Subject matter wherein a composition having utility as an invisible ink, ballpoint ink, typewriter ink, or a composition having, utility as a correction ribbon or correction fluid 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 invisible ink is a material to be used on a surface and which requires an activating means so as to become visible.

(3) Note. A composition for a correction ribbon or correction fluid is used to rectify mistakes on printed matter or duplicated matter.

(4) Note. An ink composition which is not solely disclosed as being of an invisible nature or for ballpoint or typewriter use or a composition which is not solely disclosed for use in a correction ribbon or correction fluid is placed as appropriate in Classes 523 and 524 hereinbelow.

SEE OR SEARCH CLASS

106, Compositions: Coating or Plastic, 20+, for a ballpoint or typos:graphic ink composition not containing a synthetic resin; and subclass 21 for an ink composition not containing a synthetic resin and which produces invisible characters when used, but which becomes visible when subjected to the action of heat, light, or other subsequent treatment.

252, Compositions,

301.16+, for inks containing a fluorescent or phosphorescent material which become visible when subjected to excitation, e.g., ultraviolet light, etc.

401, Coating Implements With Material Supply,

209+, for the combination of a ball-point pen and ink particularly suitable for such an implement (e.g., viscous ink).