G01N 27/409
Oxygen concentration cells
G01N27/409 (Oxygen concentration cells) appears on 217 US grants and 307 published applications in this corpus.
Search patents in G01N- Granted patents
- 217
- Published applications
- 307
- Assignees
- 51
- Inventors
- 435
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 5 |
| 2013 | 0 | 5 |
| 2014 | 7 | 11 |
| 2015 | 3 | 22 |
| 2016 | 10 | 19 |
| 2017 | 16 | 21 |
| 2018 | 16 | 19 |
| 2019 | 22 | 41 |
| 2020 | 15 | 29 |
| 2021 | 27 | 37 |
| 2022 | 19 | 34 |
| 2023 | 17 | 27 |
| 2024 | 23 | 18 |
| 2025 | 23 | 9 |
| 2026 | 17 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gas sensor7 Jul 2026US 12,674,789 B2Niterra Co., Ltd.
- Gas sensor23 Jun 2026US 12,663,398 B2NGK Insulators, Ltd.
- Gas sensor16 Jun 2026US 12,656,300 B2NGK Insulators, Ltd.
- Gas concentration detecting apparatus16 Jun 2026US 12,656,301 B2Denso Corporation
- CO2 mass estimation system, exhaust gas composition ratio estimation method, and CO2 mass estimation method12 May 2026US 12,625,107 B2NGK Insulators, Ltd.
- Co2 mass estimation system, exhaust gas composition ratio estimation method, and co2 mass estimation method17 Sep 2026US 2026/0276581 A1NGK Insulators, Ltd.
- Sensor element, gas sensor, and sensor element manufacturing method10 Sep 2026US 2026/0266754 A1Niterra Co., Ltd.
- Sensor element and gas sensor2 Jul 2026US 2026/0185958 A1Niterra Co., Ltd.
- Sensor element, gas sensor, and sensor element manufacturing method25 Jun 2026US 2026/0177522 A1Niterra Co., Ltd.
- Gas sensor23 Apr 2026US 2026/0110661 A1NGK Insulators, Ltd.
Most cited
By later US patents
- Gas sensor control device12US 10,234,418 B2Denso Corporation · 2019
- Gas sensor control device11US 10,234,420 B2Denso Corporation · 2019
- Method and device for monitoring the capability of an exhaust-gas analyzer probe to measure rich gas11US 10,338,026 B2Robert Bosch GmbH · 2019
- Oxygen concentration detector8US 4,505,805 ANGK Insulators, Ltd. · 1985
- Particulate sensor and method for operating a particulate sensor8US 7,832,254 B2Robert Bosch GmbH · 2010