Inventor
PETITPIERRE JEAN C
24 patents
⚠️ This page may combine multiple inventors who share the name “PETITPIERRE JEAN C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CIBA GEIGY CORP
23 patentsUS4302393ANov 24, 1981
Fluoran compounds
CIBA GEIGY CORP14 citations82
US4254032AMar 3, 1981
Carbazolylmethane compounds
CIBA GEIGY CORP17 citations81
US4295663AOct 20, 1981
3-Indolyl-3-bis-amino-phenyl-phthalide compounds
CIBA GEIGY CORP6 citations74
US4275005AJun 23, 1981
Carbazolylmethane compounds
CIBA GEIGY CORP7 citations73
US4269978AMay 26, 1981
Thiazolylphthalide compounds
CIBA GEIGY CORP6 citations73
US4183553AJan 15, 1980
Pressure- or heat-sensitive recording material and novel chromano compounds used therein
CIBA GEIGY CORP12 citations73
US4252975AFeb 24, 1981
3-Indolyl-3-bis-amino-phenyl-phthalide compounds
CIBA GEIGY CORP1 citations63
US4186134AJan 29, 1980
3-Indolyl-3-phenyl-phthalides
CIBA GEIGY CORP4 citations63
US4153609AMay 8, 1979
3-Indolyl-3-bis-amino-phenyl-phthalide compounds
CIBA GEIGY CORP3 citations63
US4369326AJan 18, 1983
Carbazolylmethane compounds
CIBA GEIGY CORP5 citations62
US4316621AFeb 23, 1982
Pressure-sensitive or heat-sensitive recording material
CIBA GEIGY CORP3 citations62
US4316036AFeb 16, 1982
Benzopyranothiazoles
CIBA GEIGY CORP2 citations62
US4291901ASep 29, 1981
Pressure-sensitive or heat-sensitive recording material
CIBA GEIGY CORP3 citations62
US4287336ASep 1, 1981
Chromogenic propenylenesulfone compounds
CIBA GEIGY CORP2 citations62
US4187233AFeb 5, 1980
Pressure-sensitive or heat-sensitive recording material and novel 2,2-diarylchromeno compounds used therein
CIBA GEIGY CORP2 citations62
US4132714AJan 2, 1979
Production of chromenoindole compounds
CIBA GEIGY CORP2 citations62
US4131695ADec 26, 1978
Azo color former containing heat-sensitive recording material
CIBA GEIGY CORP2 citations62
US4716424ADec 29, 1987
Pressure-sensitive or heat-sensitive recording material
CIBA GEIGY CORP4 citations61
US4174856ANov 20, 1979
Chromenoindole color formers
CIBA GEIGY CORP2 citations60
US4123439AOct 31, 1978
Chromenoindole compounds
CIBA GEIGY CORP3 citations60
US4411450AOct 25, 1983
Chromogenic propenylenesulfone compounds
CIBA GEIGY CORP1 citations52
US4309047AJan 5, 1982
Pressure-sensitive or heat-sensitive recording material
CIBA GEIGY CORP1 citations52
US4281855AAug 4, 1981
Pressure-sensitive or heat-sensitive recording material and novel 2,2-diarylchromeno compounds used therein
CIBA GEIGY CORP0 citations52