(under subclass 402) Subject matter involving color photography such as: the examination of the color properties of negatives as for copying purposes, the examination of sensitometric colored strips for the purpose of controlling the making of prints, all testing subcombinations dealing with color printing not provided for elsewhere, and the examination of the color characteristics of the scenes to be photographed in color.
(1) Note. All patents dealing with the testing of colored light which involve temperature determination and photography will be found under pyrometry in subclasses 43+.
(2) Note. Under this section are visual and photoelectric reflection and transmission tests of colored prints or negatives to correct the color balance of one or more colors in the negative, and the tests may be sequentially or simultaneously performed when more than one test is performed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
43+, for optical pyrometers. See also (1) Note above.
443+, for light transmission or absorption of photos:graphic film, per se.
SEE OR SEARCH CLASS
346, Recorders, 29, and 33 for recorders which are designed for use with color negative tests which have no specific optical test structure recited in the claim.
355, Photocopying,
32+, for color projection printers which include plural color transmission examination of negatives for the purpose of color balancing a projection type print of the tested color negative; and subclasses 78+ for color printers of the contact type which measure the intensity of a plurality of different colors transmitted through a negative in addition to the contact printing structure.
358, Facsimile,
500+, particularly subclasses 518+ and 527 for color correction systems as applied to facsimile devices and for facsimile type.
359, Optics: Systems (Including Communication) and Elements,
885+, for color filters, per se, which are used for photos:graphic purposes.
399, Electrophotography,
31+, for electrophotos:graphic devices using optical measurement and test apparatus for diagnostic testing.
430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof, appropriate subclasses for radiation imagery involving color.
