Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › 5-(1,2,4)-triazolyl-S-triazines

5-(1,2,4)-triazolyl-S-triazines

US Patent 4988811 · Granted Jan 29, 1991

Estimated economic value: $3,001,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Silver halide color photographic light-sensitive elements having improved image 1998
Silver halide photographic elements containing 2-equivalent 5-pyrazolone magenta1997
Process for preparation of 2-equivalent 4-arylthio-5-pyrazolone magenta couplers1997
Process for forming direct positive images, direct positive silver halide elemen1987
Process for forming direct positive images, direct positive silver halide elemen1987
Process for forming direct positive images, direct positive silver halide elemen1987
Process for forming direct positive images, direct positive silver halide elemen1987
Photographic elements containing 5-pyrazolone magenta couplers1981
Pivalyl-acetanilide couplers and photographic elements including them1980