G03G 15/0851
The concentration being measured by electrical means
Official title: {the concentration being measured by electrical means}
G03G15/0851 (The concentration being measured by electrical means) appears on 107 US grants and 89 published applications in this corpus.
Search patents in G03G- Granted patents
- 107
- Published applications
- 89
- Assignees
- 38
- Inventors
- 258
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 2 |
| 2005 | 0 | 1 |
| 2006 | 2 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 3 |
| 2009 | 1 | 8 |
| 2010 | 2 | 6 |
| 2011 | 6 | 4 |
| 2012 | 7 | 15 |
| 2013 | 7 | 5 |
| 2014 | 6 | 3 |
| 2015 | 5 | 3 |
| 2016 | 8 | 5 |
| 2017 | 2 | 3 |
| 2018 | 2 | 4 |
| 2019 | 3 | 1 |
| 2020 | 2 | 8 |
| 2021 | 5 | 7 |
| 2022 | 4 | 1 |
| 2023 | 4 | 1 |
| 2024 | 2 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Developing device including toner concentration sensor that detects toner concentration in developer and image forming apparatus17 Feb 2026US 12,554,213 B2KYOCERA Document Solutions Inc.
- Process cartridge and potential detection part23 Sep 2025US 12,422,776 B2Zhuhai Pantum Electronics Co., Ltd.
- Image forming apparatus26 Nov 2024US 12,153,369 B1Toshiba Tec Kabushiki Kaisha
- Developing device having inductance sensor22 Oct 2024US 12,124,191 B2Canon Kabushiki Kaisha
- Image forming apparatus and toner cartridge17 Oct 2023US 11,789,396 B2Toshiba Tec Kabushiki Kaisha
- Developing apparatus2 Oct 2025US 2025/0306504 A1Canon Kabushiki Kaisha
- Developing device and image forming apparatus12 Jun 2025US 2025/0189910 A1KYOCERA Document Solutions Inc.
- Process cartridge and potential detection part23 May 2024US 2024/0168429 A1Zhuhai Pantum Electronics Co., Ltd.
- Developing device14 Dec 2023US 2023/0400795 A1Canon Kabushiki Kaisha
- Image forming apparatus and toner cartridge1 Sep 2022US 2022/0276581 A1Toshiba Tec Kabushiki Kaisha
Most cited
By later US patents
- Image forming equipment having improved toner sensing46US 5,270,783 ARicoh Company, Ltd. · 1993
- Apparatus and method for measurement of the ratio of toner particle electrostatic charge to toner particle mass in electrostatographic devices43US 4,026,643 AXerox Corporation · 1977
- Developer concentration detecting and replenishment device30US 3,932,034 ACanon Kabushiki Kaisha · 1976
- Copy image adjustment method26US 4,277,549 ARicoh Company, Ltd. · 1981
- Image forming apparatus having a developer deterioration detecting device23US 5,162,849 AKonica Corporation · 1992