| Patents for G03G 13 - Electrographic processes using a charge pattern (6,148) |
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| 02/11/1992 | US5087538 Developing low areas of potential with negatively charged toner containing positive and negative charging colored pigments and high areas with positive toner containing charge enhancing additive |
| 02/11/1992 | US5087536 Receiving sheet bearing a toner image embedded in a thermoplastic layer |
| 02/11/1992 | CA1295652C Method of high resolution electrostatic transfer of a high density image to a nonporous and nonabsorbent conductive substrate |
| 02/05/1992 | EP0469876A2 Magnetic brush development process |
| 02/05/1992 | EP0469875A2 A color image forming method |
| 02/04/1992 | US5085967 Drying the toner images using nonaqueous solvent; transferring |
| 01/29/1992 | EP0468312A1 Hydrophilic copolymers and their use in reprography |
| 01/28/1992 | CA1294812C Color proofing method and article |
| 01/22/1992 | CA2047463A1 Hydrophilic copolymers and their use in reprography |
| 01/15/1992 | EP0465949A2 Light sensitive registration element, fabrication and processing and apparatus for implementing said process |
| 01/14/1992 | US5081528 Image forming apparatus |
| 01/14/1992 | US5081507 Registration apparatus for a printing system |
| 01/14/1992 | US5080988 Biasing scheme for improving latitudes in the tri-level xerographic process |
| 01/14/1992 | CA1294316C Electrophotographic apparatus for forming a multi-color image |
| 01/08/1992 | EP0465211A2 Highlight printing apparatus |
| 01/08/1992 | EP0465116A2 Developing process using two-component type magnetic developer |
| 01/07/1992 | US5079115 Color electrophotographic method and apparatus |
| 01/07/1992 | US5079114 Xerography, color and monochrome images using same development system |
| 01/07/1992 | US5078087 Development apparatus |
| 01/07/1992 | US5078085 Developing process |
| 12/31/1991 | US5077165 Photoconductive layers of zinc oxide and hydrophilic binder resins; antistatic agents |
| 12/31/1991 | US5077159 Using toner in which the toner does not have to be fused to the imaging member |
| 12/31/1991 | US5077158 Electrophotographic image-forming process using grey toner |
| 12/27/1991 | EP0462236A1 Multicolor image transfer method and apparatus. |
| 12/27/1991 | EP0462174A1 Liquid developer systems with self-replenishment of bulk conductivity. |
| 12/26/1991 | WO1991020156A1 Electrographic process utilizing fluorescent toner and filtered detector for generating an electrical image signal |
| 12/25/1991 | CN1015213B Method for forming images |
| 12/24/1991 | US5075186 Simplified xerography, separation of development and coloring |
| 12/24/1991 | US5075185 Imaging process comprising tri-level imaging area and an aluminum complex charge enhancing additive |
| 12/18/1991 | EP0461672A2 Image forming apparatus. |
| 12/17/1991 | US5073793 Multi-color image forming method and an apparatus therefor |
| 12/17/1991 | US5073468 Method of forming electrophotographic image |
| 12/17/1991 | US5073464 Method of processing electrophotographic lithographic printing plate precursors |
| 12/12/1991 | DE4118866A1 Producing electrophotographic lithographic printing plate - controlling electrical conductivity of liq. developer during reversal process to audio generating and discharging static electricity |
| 12/10/1991 | US5071728 Electrophotographic imaging method involves stripping transferred toner image and transferring same to alternate substrate |
| 12/04/1991 | EP0459780A2 Method of feeding developer to developing zone in electrophotography |
| 12/04/1991 | EP0459240A1 Electrophotographic light-sensitive material |
| 12/04/1991 | EP0252122B1 Apparatus and method for electrophotographically producing copies from originals having continuous-tone and other content |
| 12/03/1991 | US5069991 Panchromatic electrophotographic recording element containing multiple carrier-producing sensentizers |
| 11/27/1991 | EP0458481A2 Polymeric film |
| 11/27/1991 | EP0458298A1 Electrophotographic light-sensitive material |
| 11/19/1991 | US5066989 Electrophotographic |
| 11/19/1991 | US5066985 Color corrected image recording apparatus using yellow, magenta and cyan liquid toners |
| 11/14/1991 | DE3943556C1 Transfer of picture motifs to substrate - using digital laser copying process where toner image is fixed on motif carrier at same time as copying step |
| 11/13/1991 | EP0456268A2 Electrophotographic printing plate precursor |
| 11/12/1991 | US5064739 Method of developing electrostatic charge pattern with magnetic developer |
| 11/12/1991 | US5064736 Electrostatic method for multicolor imaging from a single toner bath |
| 11/05/1991 | US5063133 Electrophotographic developing system comprising toner having specific particle size distribution |
| 11/05/1991 | US5063127 Electrography where first toner transmitted at a lower bias voltage than second, toner mixture chargeable to the same polarity by carrier friction and foreign first toner adheres to non-imaging portion; sharpness; antisoilants |
| 10/30/1991 | EP0255543B1 Electrophotographic reproduction apparatus and method with selective screening |
| 10/29/1991 | US5061969 Hybrid development scheme for trilevel xerography |
| 10/29/1991 | US5061590 Transfer roll having internal heater; multicolor electrography |
| 10/29/1991 | US5061583 Color electrophotography for high quality half-tone images |
| 10/23/1991 | EP0453256A2 Offset transfer of toner images in electrography |
| 10/23/1991 | EP0453219A2 Method of image transfer for an electrographic printer |
| 10/23/1991 | EP0453215A2 Electrophotographic developing process and apparatus |
| 10/23/1991 | EP0453031A1 A method of forming visible images, and toner powder for use in the method |
| 10/23/1991 | EP0452410A1 Printing process |
| 10/22/1991 | US5060023 Developing process for forming image having high quality |
| 10/22/1991 | US5060020 Image recording apparatus using coloring photosensitive toner in the form of microcapsule |
| 10/19/1991 | CA2040200A1 Offset transfer of toner images in electrography |
| 10/15/1991 | US5057389 Alpha olefin laminated paper and photoconductive layer |
| 10/09/1991 | EP0450458A1 Compositions of dichloropenta fluoropropane and acetone |
| 10/09/1991 | EP0450417A1 Toner for electrostatography |
| 10/09/1991 | CN1055246A Reversal development of latent electrostatic images on xeroprinting masters |
| 10/08/1991 | US5055365 Image reversal process with reusable photoconductor; proofs produced on printing stock paper |
| 10/05/1991 | WO1991015813A1 Electrographic gravure printing system |
| 10/05/1991 | CA2054711A1 Electrographic gravure printing system |
| 10/01/1991 | US5053821 Electrophotographic image forming apparatus using photoconductive toner |
| 10/01/1991 | US5053304 Nonblurring latent images keeping memory in insulating binder, change transpotor, phthalocyanine change generator |
| 09/26/1991 | DE4109161A1 Developing latent electrostatic image - controlling amt. of developer consisting of carrier and toner by pressure of rigid cylindrical magnetic rod |
| 09/25/1991 | EP0447566A1 Color image forming method |
| 09/24/1991 | US5051329 Reversal development of latent electrostatic images on xeroprinting masters |
| 09/24/1991 | US5051327 Method for oil-densensitization treatment of lithographic printing plate |
| 09/19/1991 | WO1991014208A1 Transfer technique for small toner particles |
| 09/19/1991 | WO1991014207A1 Transfer of high resolution toned images to rough papers |
| 09/17/1991 | US5049949 Extension of tri-level xerography to black plus 2 colors |
| 09/17/1991 | US5049935 Electrophotographic image forming apparatus with reversal development |
| 09/17/1991 | US5049471 Magnetic brush development process |
| 09/17/1991 | US5049470 Development process for formation of high-quality image |
| 09/10/1991 | US5047843 Image reading method |
| 09/10/1991 | CA1288802C Permanent master with a persistent latent image for use in electrostatic transfer to a receiving substrate |
| 09/04/1991 | EP0444870A2 Receptor sheet for a toner developed electrostatic imaging process |
| 09/04/1991 | EP0444653A2 Electrophotographic light-sensitive material |
| 09/04/1991 | EP0444211A1 Printing press using charge retaining medium, its manufacturing method and stripping system using charge retaining medium |
| 09/04/1991 | EP0444124A1 Enhancing cohesiveness of developed images. |
| 09/03/1991 | US5045893 Highlight printing apparatus |
| 09/03/1991 | US5045426 Toner adhesion-enhancing coating for security documents |
| 09/03/1991 | US5045420 Color image forming method and particulate developer for developing electrostatic latent image |
| 08/28/1991 | EP0443266A1 Color electrophotography for high quality half-tone images |
| 08/28/1991 | EP0420855A4 Electrostatic method for multicolor imaging from a single toner bath |
| 08/27/1991 | US5043242 Thermally assisted transfer of electrostatographic toner particles to a thermoplastic bearing receiver |
| 08/27/1991 | US5043239 Negatively chargeable developer and image forming method |
| 08/20/1991 | US5041718 Method and device for fixing a powder image on a receiving support |
| 08/20/1991 | US5041348 Hydrophilic; storage stability |
| 08/07/1991 | EP0440226A2 Electrophotographic light-sensitive material |
| 08/06/1991 | US5038179 Method for fixing a powdered developer deposited on a sheet, and apparatus for fixing the developer by this method |
| 08/06/1991 | US5038176 Image forming apparatus having plural magnetic brush developing devices |
| 08/06/1991 | US5038171 Multicolored image forming method and apparatus therefor |
| 08/06/1991 | US5037718 Thermally assisted method of transferring small electrostatographic toner particles to a thermoplastic bearing receiver |