G01N 21/81
Indicating humidity
G01N21/81 (Indicating humidity) appears on 153 US grants and 178 published applications in this corpus.
Search patents in G01N- Granted patents
- 153
- Published applications
- 178
- Assignees
- 146
- Inventors
- 468
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 3 |
| 2004 | 0 | 0 |
| 2005 | 1 | 7 |
| 2006 | 1 | 0 |
| 2007 | 0 | 5 |
| 2008 | 2 | 3 |
| 2009 | 1 | 7 |
| 2010 | 3 | 4 |
| 2011 | 0 | 5 |
| 2012 | 3 | 7 |
| 2013 | 3 | 5 |
| 2014 | 7 | 8 |
| 2015 | 6 | 7 |
| 2016 | 4 | 8 |
| 2017 | 7 | 12 |
| 2018 | 6 | 12 |
| 2019 | 9 | 6 |
| 2020 | 6 | 15 |
| 2021 | 7 | 18 |
| 2022 | 15 | 13 |
| 2023 | 11 | 8 |
| 2024 | 6 | 5 |
| 2025 | 6 | 11 |
| 2026 | 6 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Humidity-sensing structural color emitting laminate and structural color display device self-powered by triboelectricity including the same laminate8 Sep 2026US 12,730,075 B2University-Industry Foundation, Yonsei University
- Environmentally sensitive plant ID tag16 Jun 2026US 12,656,328 B2Zebra Technologies Corporation
- Method for identifying a state of a stream of refrigerant12 May 2026US 12,625,101 B2Carrier Corporation
- Porous fluid sensor21 Apr 2026US 12,607,549 B2Solventum Intellectual Properties Company
- Electronic package having humidity indicator14 Apr 2026US 12,601,689 B2Advanced Semiconductor Engineering, Inc.
- Method for identifying a state of a stream of refrigerant20 Aug 2026US 2026/0243716 A1Carrier Corporation
- Porous fluid sensor13 Aug 2026US 2026/0235488 A1Solventum Intellectual Properties Company
- Porous metal complex-containing film, detection element provided with same, and method of producing porous metal complex-containing film6 Aug 2026US 2026/0227331 A1Taiyo Nippon Sanso Corporation
- Structurally colored mxene layer-by-layer heterostructures25 Jun 2026US 2026/0177516 A1
- Activatable humidity and gas sensors18 Jun 2026US 2026/0168933 A1Zebra Technologies Corporation
Most cited
By later US patents
- Gas sensor141US 4,824,789 ACardiovascular Devices, Inc. · 1989
- Sensor element for determination of concentration of substances108US 5,157,262 AAVL Medical Instruments AG · 1992
- Method for making fluorescent polymers90US 5,700,897 AOptical Sensors Incorporated · 1997
- Surface-bound fluorescent polymers and related methods of synthesis and use76US 5,480,723 AOptical Sensors Incorporated · 1996
- Sensor with overcoating and process for making same72US 4,919,891 AMinnesota Mining and Manufacturing Company · 1990