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Kelley — Color Photography Patents 117
Hernandez-Mejia claimed that he made his invention prior to Nov. 16th. 1910 effective on that date, which is the date of deUvery.
The U. S. Patent Office in their letter of Sept., 1915, withdrew this Gaumont patent as a reference.
3 EngUsh Patent No. 24, 534 of 1912. to John E. Thornton. Apphcation filed Oct. 26th. 1912.
Accepted Oct. 23rd. 1913.
Claim 1 In the production of kinematographic color films preparing from a single alternative negative of sectional color pictures two or more negatives of consecutive pictures each negative being of one color and subsequently preparing the final color film for projection substantially as described.
4 U. S. Pat. No. 1,245,822 Nov. 6th. 1917. John E, Thornton. Filed June 7th. 1913.
Corresponds to English 24, 534 of 1912.
Specification says:
A Its black image may be toned, one side to an orange-red, the other to a blue-green color.
B The silver may be removed and replaced by dyes, by one of the well-known substitution methods; or converted into a salt which reacts as a mordant on dyes and precipitates them in situ.
The film is coated or sensitized on both front and back faces, thus producing a duplex film, but between the central celluloid base "b" and one of the sensitized layers "a" (or it may be both if desired) a layer "c" of light obstructing material, such as water soluable dye in gelatine is applied. This color washes out during development, fixing and washing as described in my application filed on the 10th. of April 1913, Serial Number 760,200.
Accuracy of register is secured by the perforations in the films and by the feed devices all being exceedingly accurate, etc.
CLAIM 2 :-The herein described method of producing two-color value positive pictures for cinematographic films from a single strip of negative film having the picture negatives of different color values arranged in alternating sequence there on, which comprises printing on one side of a transparent film positive pictures from the picture negatives of one color value, and then printing in register on the opposite side of the transparent film the positive pictures from the picture negative of the other color value, the negative film and positive film being superimposed during said printing operations and the negative film being advanced twice the distance of the positive film between the printing of each picture, and subsequently coloring the pictures on the positive film in the correct color.
5 English No. 9324 of 1912. Filed Apr. 19, 1912. John E. Thornton.
Requires two negatives and light obstructing medium in film.
Claim 1 In the production of Kinematographic color picture
films printing simultaneously from two negatives on both sides of a