Inventor
FLETCHER IAN J
CH27 patents
Patents
27 patentsUS5329006AJul 12, 1994
Chromogenic lactam compounds, their preparation and their use
CIBA GEIGY CORP21 citations92
US4435003AMar 6, 1984
Chromogenic quinazolines
CIBA GEIGY CORP27 citations92
US4480096AOct 30, 1984
Chromogenic quinazolines
CIBA GEIGY CORP24 citations82
US4157443AJun 5, 1979
V-Triazolyl-[4,5-d]-pyrimidines
CIBA GEIGY CORP13 citations82
US5426192AJun 20, 1995
Chromogenic lactam compounds, their preparation and their use
CIBA GEIGY CORP12 citations74
US4766211AAug 23, 1988
Chromogenic quinazolines
CIBA GEIGY CORP9 citations74
US4705775ANov 10, 1987
Recording material employing chromogenic bisquinazolines
CIBA GEIGY CORP5 citations74
US4625027ANov 25, 1986
Bisquinazolines useful in color former systems
CIBA GEIGY CORP8 citations74
US4668790AMay 26, 1987
Chromogenic dihydrofuropyridinones
CIBA GEIGY CORP9 citations73
US4587343AMay 6, 1986
Chromogenic 3,3-bisindolyl-4-azaphthalides
CIBA GEIGY CORP5 citations73
US4508897AApr 2, 1985
Preparation of chromogenic azaphthalides
CIBA GEIGY CORP12 citations73
US4562449ADec 31, 1985
Chromogenic dihydroquinazolines
CIBA GEIGY CORP6 citations71
US4933448AJun 12, 1990
Chromogenic lactone compounds of benzopyrano-2H-pyrazoles
CIBA GEIGY CORP3 citations63
US4668966AMay 26, 1987
Aliphatic bridged chromogenic bisquinazolines substituted with phenylamine or phenyl-containing heterobicyclic radicals
CIBA GEIGY CORP5 citations63
US4555569ANov 26, 1985
Chromogenic quinazolines
CIBA GEIGY CORP2 citations63
US4302586ANov 24, 1981
V-Triazolyl-[4,5-d]-pyrimidines
CIBA GEIGY CORP4 citations63
US4236003ANov 25, 1980
V-Triazolyl-[4,5-d]-pyrimidH.
CIBA GEIGY CORP3 citations63
US4705776ANov 10, 1987
Recording material containing chromogenic 3,3-bisindolyl-4-azaphthalides
CIBA GEIGY CORP2 citations62
US4695636ASep 22, 1987
Chromogenic dihydrofuropyridinones
CIBA GEIGY CORP3 citations62
US4675407AJun 23, 1987
Ring-substituted 4-azaphthalides
CIBA GEIGY CORP2 citations62
US4587539AMay 6, 1986
Chromogenic dihydrofuropyridinones
CIBA GEIGY CORP4 citations62
US4146500AMar 27, 1979
Triazole compounds
CIBA GEIGY CORP3 citations62
US4506073AMar 19, 1985
Chromenoazaindolizine compounds
CIBA GEIGY CORP5 citations60
US5162550ANov 10, 1992
Bisphthalide lactones, their preparation and the use thereof in recording materials
CIBA GEIGY CORP1 citations52
US4331805AMay 25, 1982
V-Triazolyl-[4,5-d]-pyrimidines
CIBA GEIGY CORP0 citations52
US4138429AFeb 6, 1979
Process for the manufacture of o-phenylenediacetonitrile
CIBA GEIGY CORP0 citations52
US4503227AMar 5, 1985
Chromogenic dihydroquinazolines
CIBA GEIGY CORP0 citations50