G03G 9/1075
Structural characteristics of the carrier particles
Official title: {Structural characteristics of the carrier particles, e.g. shape or crystallographic structure}
G03G9/1075 (Structural characteristics of the carrier particles) appears on 500 US grants and 428 published applications in this corpus.
Search patents in G03G- Granted patents
- 500
- Published applications
- 428
- Assignees
- 81
- Inventors
- 872
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 6 | 0 |
| 1978 | 7 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 10 | 0 |
| 1991 | 5 | 0 |
| 1992 | 9 | 0 |
| 1993 | 9 | 0 |
| 1994 | 12 | 0 |
| 1995 | 6 | 0 |
| 1996 | 17 | 0 |
| 1997 | 9 | 0 |
| 1998 | 6 | 0 |
| 1999 | 8 | 0 |
| 2000 | 23 | 0 |
| 2001 | 9 | 1 |
| 2002 | 11 | 12 |
| 2003 | 12 | 16 |
| 2004 | 10 | 11 |
| 2005 | 2 | 9 |
| 2006 | 3 | 23 |
| 2007 | 10 | 25 |
| 2008 | 13 | 21 |
| 2009 | 14 | 20 |
| 2010 | 7 | 29 |
| 2011 | 21 | 23 |
| 2012 | 20 | 24 |
| 2013 | 26 | 27 |
| 2014 | 35 | 25 |
| 2015 | 17 | 13 |
| 2016 | 17 | 21 |
| 2017 | 23 | 24 |
| 2018 | 18 | 14 |
| 2019 | 14 | 21 |
| 2020 | 18 | 15 |
| 2021 | 15 | 7 |
| 2022 | 1 | 14 |
| 2023 | 3 | 8 |
| 2024 | 4 | 14 |
| 2025 | 9 | 7 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Carrier core material and electrophotographic development carrier using same and electrophotographic developer6 Oct 2026US 12,754,491 B2Dowa Electronics Materials Co., Ltd.
- Carrier core material, and electrophotographic development carrier and electrophotographic developer using same28 Jul 2026US 12,693,608 B2Dowa Electronics Materials Co., Ltd.
- Toner, toner production method, and two-component developer28 Apr 2026US 12,613,478 B2Canon Kabushiki Kaisha
- Ferrite particle, carrier core material for electrophotographic developer, carrier for electrophotographic developer, and electrophotographic developer28 Oct 2025US 12,455,516 B2Powdertech Co., Ltd.
- Carrier for forming electrophotographic image, developer for forming electrophotographic image, electrophotographic image forming method, electrophotographic image forming apparatus, and process cartridge7 Oct 2025US 12,436,479 B2Ricoh Company, Ltd.
- Magnetic carrier and two-component developer containing magnetic carrier25 Jun 2026US 2026/0177940 A1KYOCERA Document Solutions Inc.
- Two-component developer28 May 2026US 2026/0147287 A1
- Magnetic carrier and two component developer containing the same, and method for producing magnetic carrier14 May 2026US 2026/0133513 A1KYOCERA Document Solutions Inc.
- Magnetic carrier for electrostatic charge image development15 Jan 2026US 2026/0016765 A1
- Carrier, two-component developing agent, process cartridge, image forming apparatus, and image forming method2 Oct 2025US 2025/0306493 A1
Most cited
By later US patents
- Preparation of spheroidized particles86US 4,076,640 AXerox Corporation · 1978
- Two-component developer, container filled with the two-component developer, and image formation apparatus80US 6,468,706 B2Ricoh Company, Ltd. · 2002
- Carrier for image developer for electrophotography77US 6,406,826 B1Ricoh Company, Ltd. · 2002
- Process for developing electrographic images by causing electrical breakdown in the developer74US 4,076,857 AEastman Kodak Company · 1978
- Method of producing magnetic carrier and magnetic carrier that uses this production method66US 8,927,188 B2Canon Kabushiki Kaisha · 2015