(under the class definition) Processes resulting in a product which has an indistinguishable image, pattern, or design in a coating which can be made visible by chemical or physical treatment; or a process of making the image, pattern, or design in such a product become visible.
(1) Note. This subclass includes the use of invisible inks and color producing coatings.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1, for developing latent images of fingerprints.
7, for producing fraud detecting devices which have latent images.
SEE OR SEARCH CLASS 250, Radiant Energy, for processes of developing latent images with infrared or heat rays.
430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof, appropriate subclasses for process of imaging or developing a formed image.
