Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Metal-free, substituted phthalocyanines in the .chi.-modification

Metal-free, substituted phthalocyanines in the .chi.-modification

US Patent 5367069 · Granted Nov 22, 1994

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Electrophotographic recording material containing metal-free phthalocyanines2001
3-aryl-tetronic acid derivatives2000
3-aryl-tetronic acid derivatives, the production thereof and the use thereof as 1998
Electrophotographic material containing particular phthalocyanines1998
Process for the preparation of 2-halogenopyridinealdehydes and novel 2-halogenop1998
N-phenylacetamino nitriles1997
Pigment salts and their use for dyeing and pigmenting1996
N-phenylacetamino nitriles intermediates and process for making pyrroline-2 -1996
Process for the preparation of 1,2,3-tricyanobenzene, phthalocyanines which are 1995
Process for the preparation of 1,2,3-tricyanobenzene, phthalocyanines which are 1995
Process for preparation of asymmetric isoindoline pigments1994
Substituted 2-thiazolyl tetrazolium salt indicators1994