| Patents for C09B 48 - Quinacridones (562) |
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| 09/11/1990 | US4956464 Preparation of dihydroquinacridones, quinacridones and quinacridonequinones |
| 05/22/1990 | CA1269380A1 Silanated quinacridone dyes and composite pigments |
| 04/18/1990 | EP0363759A2 Process for the manufacture of a possibly substituted quinacridone |
| 04/11/1990 | EP0362703A2 Chinaoridone with selectively imparted triboelectric effects |
| 01/23/1990 | US4895949 Process for preparation of quinacridone solid solutions |
| 12/27/1989 | EP0348347A2 Process for the manufacture of solid solutions of quinacridones |
| 11/02/1989 | DE3813625A1 Process for the preparation of dihydroquinacridones, quinacridones and quinacridonequinones |
| 05/11/1989 | DE3736261A1 Process for the preparation of dihydroquinacridones, quinacridones and quinacridonequinones in the gas phase |
| 05/03/1989 | EP0313965A2 Process for the manufacture of dihydroquinacridones, of quinacridones and of quinacridone quinones |
| 03/14/1989 | US4812568 Cyclization of a 2,5-di(phenylamino)-3,6-dihydroterephthalate |
| 09/24/1988 | WO1998041582A1 Water-soluble quinacridones |
| 07/26/1988 | US4760004 Electrophotographic photoreceptor |
| 07/19/1988 | US4758665 Process for preparing high-hiding gamma-modification of unsubstituted linear transquinacridone |
| 07/19/1988 | US4758664 Process for the preparation of linear quinacridones |
| 05/24/1988 | CA1237228A1 Manufacture of resin extended pigments |
| 05/18/1988 | EP0267873A2 Thioquinacridones and isoquinacridones, process to manufacture them and their use |
| 09/09/1987 | EP0235647A2 Process for the manufacture of 6,13-dihydroquinacridones and quinacridones |
| 08/04/1987 | US4684408 Paints, enamels plastics, inks |
| 12/16/1986 | CA1215346A1 Borox dispersion milling of quinacridones |
| 12/10/1986 | EP0204139A2 Process for the manufacture of linear quinacridones |
| 04/29/1986 | US4585864 Paints, enamels, plastics, inks |
| 10/22/1985 | US4548968 Manufacture of resin extended pigments |
| 07/10/1985 | EP0148022A2 Silane quinacridone dyes, composite pigments obtainable therefrom, and processes for preparing the same |
| 05/22/1985 | EP0142066A2 Covering gamma modification of a non substituted linear trans-quinacridone |
| 01/16/1985 | EP0131467A2 Borax dispersion milling of quinacridones |
| 10/23/1984 | US4478968 Manufacture of resin extended pigments |
| 10/17/1984 | EP0122122A2 Manufacture of resin extended pigments |
| 09/04/1984 | US4469523 Alcohol and polyoxyalkylene glycol |
| 07/03/1984 | CA1170254A1 Dyes containing imidazolylmethylene groups |
| 05/29/1984 | US4451398 Dyes containing imidazolymethylene groups |
| 03/21/1984 | EP0103187A2 Light stable quinacridonequinone pigments |
| 01/17/1984 | US4426231 Light stable quinacridonequinone pigments |
| 08/23/1983 | US4400515 Quinacridone mixtures, process for their manufacture and their use as pigments |
| 04/19/1983 | CA1144928A1 Preparation of 1,2,3,4-tetrahydro-7-(phenyl)amino-9 (ioh) acridinone |
| 04/19/1983 | CA1144927A1 Light stable quinacridonequinone yellow pigment |
| 01/12/1982 | US4310359 Pigment compositions |
| 09/02/1981 | EP0034725A2 Dyestuffs containing imidazolylethylene groups and their use |
| 09/01/1981 | US4286998 Light stable quinacridonequinone yellow pigment |
| 05/13/1981 | EP0028445A2 Acridinones, their preparation and use; intermediates and their preparation |
| 03/24/1981 | US4258190 By reacting cyclohexanone and an oxalate ester to form a cyclohexanonecarboxylate intermediate |
| 03/11/1981 | EP0024892A1 Process for preparing quinacridonequinone |
| 07/15/1980 | US4212975 Cyclization of 2,5-dianilinoterephthalic acid using polyphosphoric acid condensing agent, wet grinding |
| 06/25/1980 | EP0012432A1 Light-stable quinacridonequinone yellow pigment and post treatment to improve its dispersibility |
| 05/28/1980 | EP0011105A1 Bis-N-dialkylcarbamyl-quinacridones, process for their preparation and their application |
| 04/16/1980 | EP0009720A1 Mixtures of quinacridones, process for preparing them and their application as pigments |
| 04/08/1980 | US4197404 Preparation of γ-quinacridone pigment |
| 02/05/1980 | CA1071208A1 Preparation of quinacridone using fecl3 |
| 11/14/1979 | EP0005375A2 Process for preparing pigmentary gammaquinacridone by oxidation of beta-dihydroquinacridone in the presence of a nitrogenous quinacridone |
| 08/28/1979 | CA1061344A1 Quinacridone process |
| 05/02/1979 | EP0001613A1 Process for preparing linear trans-quinacridone in gamma-crystal modification |
| 03/20/1979 | CA1050984A1 Process for preparing gamma quinacridone from polyphosphoric acid and alcohol |
| 07/11/1978 | US4100162 Ring closure of 2,5-dianilinoterephthalic acid |
| 07/11/1978 | US4099980 Process for producing gamma quinacridone solid solutions |
| 03/21/1978 | US4080355 Polyester and polyamide fibers |
| 12/20/1977 | US4064129 Cyclizing 2,5-diarylamino-terephthalic acid in ethylene glycol, acid catalyst |
| 09/20/1977 | US4049376 Dyed copolyesters and method of making |
| 05/24/1977 | US4025518 Alkalimetal chlorate in presence of vanadium pentoxide |
| 05/17/1977 | US4024148 Crystalline form of quinacridone |
| 04/12/1977 | US4017496 Process for preparing pigmentary quinacridone in predetermined crystal form |
| 04/05/1977 | US4015998 2,9-Dichloroquinacridone pigment compositions |
| 08/31/1976 | US3978062 Organic pigments |
| 02/24/1976 | US3940399 Process for the production of gamma quinacridone |