Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Photosensitive silver halide material for obtaining half-tone black-and-white images and method for half-tone high-contrast reproduction

Photosensitive silver halide material for obtaining half-tone black-and-white images and method for half-tone high-contrast reproduction

US Patent 4659647 · Granted Apr 21, 1987

Estimated economic value: $18,946,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Infrared sensitive photographic elements1999
Method of preparing silver halide photographic emulsions1996
Negative-acting silver halide photographic elements having extended UV exposure 1994
Process for preparing bisphenol fluorene compounds1993
Process for the production of photosensitive silver halide emulsions1992
Silver halide photographic element, photographic coating composition and process1991
3-aminoallylidenemalononitrile UV-absorbing compounds and photographic elements 1990
Surface treatment of pet film1989
White light handeable direct-positive silver halide photographic elements1989
White light handeable direct-positive silver halide photographic elements1989
Silver halide color photographic elements1989
Ultraviolet absorber in photographic elements1986