Inventor
HELD ROBERT P
25 patents
Patents
25 patentsUS5429860AJul 4, 1995
Reactive media-ink system for ink jet printing
DU PONT131 citations96
US5537137AJul 16, 1996
Reactive media-ink system for ink jet printing
DU PONT91 citations93
US4584261AApr 22, 1986
Process for etching nonphotosensitive layer under washoff photopolymer layer
DU PONT21 citations82
US4461823AJul 24, 1984
Multiple transfer of tacky image areas using prolonged tack toners
DU PONT20 citations82
US4147549AApr 3, 1979
Lithographic printing plate having addition polymerized areas and binder areas
DU PONT20 citations82
US5039588AAug 13, 1991
Non-electroscopic prolonged tack toners
DU PONT7 citations74
US5240814AAug 31, 1993
Curable, heat activatable transfer toners
DU PONT7 citations73
US4567130AJan 28, 1986
Process for etching single photopolymer layer utilizing chemically soluble pigments
DU PONT16 citations73
US4469625ASep 4, 1984
Prolonged tack toners for the preparation of electric circuits
DU PONT14 citations73
US4264692AApr 28, 1981
Photopolymerized elements having selectively dye absorbed hydrophilic and oleophilic images
DU PONT7 citations73
US4198236AApr 15, 1980
Method for preparation of lithographic printing plate having addition polymerized areas and binder areas
DU PONT12 citations73
US5275918AJan 4, 1994
Ultraviolet curable heat activatable transfer toners
DU PONT12 citations72
US4869996ASep 26, 1989
Process for preparing negative images on a positive-type tonable photosensitive element
DU PONT15 citations71
US5250387AOct 5, 1993
Transfer process using ultraviolet curable, non-prolonged tack toning materials
DU PONT7 citations65
US5227278AJul 13, 1993
Positive-working, low silver wash-off contact film
DU PONT2 citations62
US5219702AJun 15, 1993
Process for detackifying transferred toned images
DU PONT2 citations62
US4948701AAug 14, 1990
Silver halide wash-out elements
DU PONT2 citations62
US4654296AMar 31, 1987
Process for making lithographic film using photopolymer diffusion modulation layer for pigmented bottom layer
DU PONT3 citations62
US4567129AJan 28, 1986
Process for image formation utilizing chemically soluble pigments
DU PONT4 citations62
US5578412ANov 26, 1996
Photosensitive films having a thermally sensitive material containing layer and process for using the same
DU PONT3 citations54
US5314784AMay 24, 1994
Process for detackifying transferred toned images
DU PONT0 citations52
US4923389AMay 8, 1990
Negative working low silver wash-off contact film
DU PONT1 citations52
US4579808AApr 1, 1986
Imageable colloidal metal/mercaptan elements
DU PONT1 citations52
US4565770AJan 21, 1986
Process for dot etching acid soluble photopolymerizable elements utilizing chemically soluble pigments
DU PONT1 citations52
US4416968ANov 22, 1983
Preparation of a printing master by toning a photopolymer film with magnetic toner
DU PONT1 citations52