G01N 21/80
Indicating ph value
Official title: Indicating pH value
G01N21/80 (Indicating ph value) appears on 472 US grants and 578 published applications in this corpus.
Search patents in G01N- Granted patents
- 472
- Published applications
- 578
- Assignees
- 385
- Inventors
- 1,375
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 9 | 0 |
| 1990 | 8 | 0 |
| 1991 | 10 | 0 |
| 1992 | 15 | 0 |
| 1993 | 5 | 0 |
| 1994 | 12 | 0 |
| 1995 | 2 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 3 |
| 2003 | 3 | 7 |
| 2004 | 3 | 6 |
| 2005 | 1 | 9 |
| 2006 | 3 | 10 |
| 2007 | 4 | 11 |
| 2008 | 6 | 17 |
| 2009 | 3 | 13 |
| 2010 | 9 | 17 |
| 2011 | 11 | 18 |
| 2012 | 15 | 27 |
| 2013 | 10 | 20 |
| 2014 | 11 | 13 |
| 2015 | 21 | 35 |
| 2016 | 24 | 31 |
| 2017 | 26 | 35 |
| 2018 | 25 | 35 |
| 2019 | 32 | 31 |
| 2020 | 26 | 44 |
| 2021 | 17 | 49 |
| 2022 | 31 | 34 |
| 2023 | 31 | 39 |
| 2024 | 23 | 33 |
| 2025 | 23 | 24 |
| 2026 | 18 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydrogel coating composition for chemical sensor and chemical sensor fabricated using same1 Sep 2026US 12,723,159 B2Kookmin University Industry Academy Cooperation Foundation
- Chromium VI test1 Sep 2026US 12,723,987 B2Matinspired B.V.
- Water test paper and multifunctional detection test kit30 Jun 2026US 12,669,442 B2
- Device and process for analysing gas effects in samples28 Apr 2026US 12,613,230 B2Eurac Research
- Threshold-triggered tracer particles28 Apr 2026US 12,613,233 B2Patentpool Innovations Management GmbH
- Method for converting measurement value of saliva, information processing device, and program3 Sep 2026US 2026/0259199 A1ARKRAY, Inc.
- Indicators to indicate the degree of depolymerisation30 Jul 2026US 2026/0217908 A1B4Plastics
- Wearable optical analyte sensor23 Jul 2026US 2026/0210858 A1Solventum Intellectual Properties Company
- Chromic sensor for an intravenous catheter16 Jul 2026US 2026/0199632 A1CareFusion 303, Inc.
- Chewing ability measurement method, chewing ability confirmation system, and dedicated mount9 Jul 2026US 2026/0194391 A1Lotte Co., Ltd.
Most cited
By later US patents
- Fiber-optic physiological probes732US 4,925,268 AAbbott Laboratories · 1990
- Sensors for continuous monitoring of biochemicals and related method529US 6,256,522 B1University of Pittsburgh—Of the Commonwealth System of Higher Education · 2001
- Fiber optic pH probe338US 4,200,110 AUnited States of America · 1980
- Reservoir chemical sensors308US 5,116,759 AFiberChem Inc. · 1992
- Optical fiber distribution system for an optical fiber sensor292US 4,907,857 AAbbott Laboratories · 1990