G03G 13/00
Electrographic processes using a charge pattern
Official title: Electrographic processes using a charge pattern (G03G15/00, G03G16/00, G03G17/00 take precedence)
G03G13/00 (Electrographic processes using a charge pattern) appears on 1,967 US grants and 719 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,967
- Published applications
- 719
- Assignees
- 282
- Inventors
- 3,357
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 52 | 0 |
| 1977 | 39 | 0 |
| 1978 | 28 | 0 |
| 1979 | 19 | 0 |
| 1980 | 23 | 0 |
| 1981 | 39 | 0 |
| 1982 | 32 | 0 |
| 1983 | 26 | 0 |
| 1984 | 39 | 0 |
| 1985 | 39 | 0 |
| 1986 | 33 | 0 |
| 1987 | 49 | 0 |
| 1988 | 28 | 0 |
| 1989 | 55 | 0 |
| 1990 | 56 | 0 |
| 1991 | 71 | 0 |
| 1992 | 61 | 0 |
| 1993 | 72 | 0 |
| 1994 | 60 | 0 |
| 1995 | 67 | 0 |
| 1996 | 74 | 0 |
| 1997 | 82 | 0 |
| 1998 | 102 | 0 |
| 1999 | 70 | 0 |
| 2000 | 77 | 0 |
| 2001 | 52 | 18 |
| 2002 | 44 | 59 |
| 2003 | 62 | 85 |
| 2004 | 48 | 33 |
| 2005 | 33 | 26 |
| 2006 | 26 | 15 |
| 2007 | 10 | 18 |
| 2008 | 13 | 27 |
| 2009 | 7 | 20 |
| 2010 | 15 | 19 |
| 2011 | 11 | 22 |
| 2012 | 14 | 15 |
| 2013 | 19 | 78 |
| 2014 | 48 | 75 |
| 2015 | 80 | 35 |
| 2016 | 34 | 27 |
| 2017 | 25 | 24 |
| 2018 | 26 | 27 |
| 2019 | 27 | 26 |
| 2020 | 25 | 19 |
| 2021 | 17 | 16 |
| 2022 | 21 | 14 |
| 2023 | 5 | 6 |
| 2024 | 6 | 4 |
| 2025 | 4 | 6 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G03G 13/06Developing676
- G03G 13/01Electrographic processes using a charge pattern: for multicoloured copies429
- G03G 13/22Processes involving a combination of more than one step according to groups259
- G03G 13/20Fixing241
- G03G 13/26Electrographic processes using a charge pattern: for the production of printing plates225
- G03G 13/14Transferring a pattern to a second base216
- G03G 13/04Exposing, i.e. imagewise exposure by optically projecting the original image on a61
- G03G 13/02Sensitising, i.e. laying-down a uniform charge48
All 12 subgroupsShow fewer
- G03G 13/056Electrographic processes using a charge pattern: using internal polarisation12
- G03G 13/34Editing, i.e. producing a composite image by copying one or more original12
- G03G 13/054Electrographic processes using a charge pattern: using x-rays6
- G03G 13/05Imagewise charging, i.e. laying-down a charge in the configuration of an original3
Recent patents
- Toner, resin particles, developer, toner storage unit, image forming apparatus, method for producing toner, and image forming method14 Apr 2026US 12,601,986 B2Ricoh Company, Ltd.
- Electrostatic charge image developing green toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method7 Apr 2026US 12,596,313 B2FUJIFILM Business Innovation Corp.
- Controlling exposure apparatus used in image forming apparatus30 Dec 2025US 12,510,840 B2Canon Kabushiki Kaisha
- Particle set for producing printed matter, apparatus for producing printed matter, and method for producing printed matter2 Dec 2025US 12,487,537 B2FUJIFILM Business Innovation Corp.
- Image forming apparatus18 Nov 2025US 12,474,648 B2Oki Electric Industry Co., Ltd.
- Transfer sheet and image forming method9 Jul 2026US 2026/0194843 A1Etria Co., Ltd.
- Image forming apparatus25 Jun 2026US 2026/0177943 A1FUJIFILM Business Innovation Corp.
- Process cartridge23 Apr 2026US 2026/0110985 A1Canon Kabushiki Kaisha
- Image forming apparatus, non-transitory computer readable medium storing program, and image forming method12 Mar 2026US 2026/0072390 A1FUJIFILM Business Innovation Corp.
- Image forming system, non-transitory computer readable medium storing program, and image forming method26 Feb 2026US 2026/0056502 A1FUJIFILM Business Innovation Corp.
Most cited
By later US patents
- Layer manufacturing using electrostatic imaging and lamination190US 6,376,148 B1Nanotek Instruments, Inc. · 2002
- Method for two-color development of a xerographic charge pattern154US 4,078,929 AXerox Corporation · 1978
- Electrophotography-based additive manufacturing system with transfer-medium service loops127US 8,488,994 B2Stratasys, Inc. · 2013
- Image forming apparatus including preselected range between charge injection layer and voltage potential120US 6,366,751 B1Ricoh Company, Ltd. · 2002
- Liquid ink electrostatic image development system111US 5,383,008 AXerox Corporation · 1995