Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › 4-Hydroxyalkyl-substituted 3-pyrazolidinone electron transfer agents

4-Hydroxyalkyl-substituted 3-pyrazolidinone electron transfer agents

US Patent 4481287 · Granted Nov 6, 1984

Estimated economic value: $5,326,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Color photographic materials with magenta minimum density dyes2009
Color photographic materials with yellow minimum density colorants2009
Color photographic material with improved sensitivity2004
Color photographic material with improved sensitivity comprising a pyrazolotriaz2004
Cyan coupler dispersion with increased activity2004
Color negative element containing triple-coated blue record and method of imagin2003
Plasticized cross-linked receiving element for thermal dye transfer2001
Photographic element containing a malonanilide DIR coupler2000
Slipping layer for dye-donor element used in thermal dye transfer1999
Backing layer for receiver used in thermal dye transfer1999
Photographic silver halide element having polyethylene naphthalate support and t1998
Photographic materials having releasable compounds1997