G03G 15/0855
The concentration being measured by optical means
Official title: {the concentration being measured by optical means}
G03G15/0855 (The concentration being measured by optical means) appears on 1,120 US grants and 739 published applications in this corpus.
Search patents in G03G- Granted patents
- 1,120
- Published applications
- 739
- Assignees
- 117
- Inventors
- 1,631
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 7 | 0 |
| 1982 | 6 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 14 | 0 |
| 1986 | 11 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 12 | 0 |
| 1990 | 15 | 0 |
| 1991 | 14 | 0 |
| 1992 | 18 | 0 |
| 1993 | 21 | 0 |
| 1994 | 15 | 0 |
| 1995 | 23 | 0 |
| 1996 | 27 | 0 |
| 1997 | 27 | 0 |
| 1998 | 44 | 0 |
| 1999 | 36 | 0 |
| 2000 | 30 | 0 |
| 2001 | 35 | 18 |
| 2002 | 38 | 47 |
| 2003 | 49 | 37 |
| 2004 | 41 | 50 |
| 2005 | 33 | 56 |
| 2006 | 41 | 45 |
| 2007 | 54 | 66 |
| 2008 | 39 | 73 |
| 2009 | 47 | 73 |
| 2010 | 65 | 61 |
| 2011 | 47 | 48 |
| 2012 | 70 | 40 |
| 2013 | 40 | 14 |
| 2014 | 38 | 15 |
| 2015 | 26 | 13 |
| 2016 | 18 | 16 |
| 2017 | 8 | 10 |
| 2018 | 15 | 10 |
| 2019 | 12 | 9 |
| 2020 | 12 | 6 |
| 2021 | 6 | 8 |
| 2022 | 7 | 6 |
| 2023 | 3 | 4 |
| 2024 | 9 | 6 |
| 2025 | 5 | 6 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Image forming apparatus25 Aug 2026US 12,717,258 B2Sharp Kabushiki Kaisha
- 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.
- Image forming apparatus having detection of stored toner amount18 Nov 2025US 12,474,652 B2Canon Kabushiki Kaisha
- Toner container having a shutter lock mechanism19 Aug 2025US 12,393,137 B2Lexmark International, Inc.
- Magnetic carrier, two-component developer, and developer for replenishment12 Aug 2025US 12,386,282 B2Canon Kabushiki Kaisha
- Toner cartridge16 Jul 2026US 2026/0202789 A1General Plastic Industrial Co., Ltd.
- Toner cartridge and image forming apparatus15 Jan 2026US 2026/0016773 A1Canon Kabushiki Kaisha
- Toner container having a shutter lock mechanism20 Nov 2025US 2025/0355383 A1Lexmark International, Inc.
- Developing cartridge having electrode6 Nov 2025US 2025/0341796 A1Brother Kogyo Kabushiki Kaisha
- Developing device and image forming apparatus12 Jun 2025US 2025/0189910 A1KYOCERA Document Solutions Inc.
Most cited
By later US patents
- Replaceable part with integral memory for usage, calibration and other data311US 5,835,817 AHewlett-Packard Company · 1998
- Arrangement for printer equipment for monitoring reservoirs that contain printing medium284US 5,365,312 AMannesmann Aktiengesellschaft · 1994
- Replaceable part with integral memory for usage, calibration and other data276US 5,699,091 AHewlett-Packard Company · 1997
- Password protected memory on replaceable components for printing devices182US 6,738,903 B1Hewlett-Packard Development Company, L. P. · 2004
- Process cartridge, unit, and electrophotographic image forming apparatus169US 6,912,365 B2Canon Kabushiki Kaisha · 2005