G01N 27/41
Oxygen pumping cells
G01N27/41 (Oxygen pumping cells) appears on 197 US grants and 293 published applications in this corpus.
Search patents in G01N- Granted patents
- 197
- Published applications
- 293
- Assignees
- 28
- Inventors
- 331
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 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 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 0 | 3 |
| 2014 | 4 | 6 |
| 2015 | 2 | 12 |
| 2016 | 2 | 22 |
| 2017 | 9 | 20 |
| 2018 | 16 | 37 |
| 2019 | 26 | 23 |
| 2020 | 23 | 25 |
| 2021 | 21 | 34 |
| 2022 | 17 | 29 |
| 2023 | 16 | 26 |
| 2024 | 18 | 22 |
| 2025 | 22 | 18 |
| 2026 | 20 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sensor element6 Oct 2026US 12,754,161 B2NGK Insulators, Ltd.
- Gas sensor29 Sep 2026US 12,748,070 B2NGK Insulators, Ltd.
- Gas sensor23 Jun 2026US 12,663,398 B2NGK Insulators, Ltd.
- Gas sensor element, gas sensor, and manufacturing method for gas sensor element16 Jun 2026US 12,656,298 B2Niterra Co., Ltd.
- Gas sensor element and gas sensor16 Jun 2026US 12,656,299 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.
- Gas sensor and control method of gas sensor10 Sep 2026US 2026/0266759 A1NGK Insulators, Ltd.
- Sensor element and gas sensor3 Sep 2026US 2026/0259170 A1NGK Insulators, Ltd.
- Sensor element, gas sensor, and sensor element manufacturing method25 Jun 2026US 2026/0177522 A1Niterra Co., Ltd.
- Gas sensor and sensor element18 Jun 2026US 2026/0168957 A1NGK Insulators, Ltd.
Most cited
By later US patents
- Apparatus and method for onboard performance monitoring of oxidation catalyst12US 8,783,019 B2GM Global Technology Operations LLC · 2014
- 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
- Diagnosis system of internal combustion engine11US 9,897,028 B2Toyota Jidosha Kabushiki Kaisha · 2018
- Air fuel ratio sensory5US 5,580,440 AHitachi, Ltd. · 1996