Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Pressure-sensitive or heat-sensitive recording material containing a carbazolyl methane compound

Pressure-sensitive or heat-sensitive recording material containing a carbazolyl methane compound

US Patent 4202820 · Granted May 13, 1980

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Pressure-sensitive recording and transfer material1993
Carbazolylmethane compounds1983
Pressure-sensitive or heat-sensitive recording material1982
Indolinospiropyrane compounds1982
Indolinospiropyrane compounds1982
Recording material employing substituted 3,6-diaminophthalides as color formers1981
Carbazolylmethane compounds1981
Carbazolylmethane compounds1981
Pressure-sensitive or heat-sensitive recording material1980
Indolinospiropyrane compounds1980
Substituted 3,6-diaminophthalides1980