G01N 31/229
For investigating time/temperature history
Official title: {for investigating time/temperature history}
G01N31/229 (For investigating time/temperature history) appears on 188 US grants and 206 published applications in this corpus.
Search patents in G01N- Granted patents
- 188
- Published applications
- 206
- Assignees
- 123
- Inventors
- 361
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 6 |
| 2003 | 6 | 6 |
| 2004 | 5 | 4 |
| 2005 | 3 | 5 |
| 2006 | 3 | 5 |
| 2007 | 1 | 9 |
| 2008 | 1 | 8 |
| 2009 | 4 | 13 |
| 2010 | 9 | 10 |
| 2011 | 5 | 10 |
| 2012 | 7 | 5 |
| 2013 | 5 | 10 |
| 2014 | 7 | 11 |
| 2015 | 6 | 11 |
| 2016 | 8 | 12 |
| 2017 | 12 | 12 |
| 2018 | 10 | 12 |
| 2019 | 9 | 11 |
| 2020 | 7 | 10 |
| 2021 | 7 | 11 |
| 2022 | 8 | 6 |
| 2023 | 10 | 5 |
| 2024 | 5 | 6 |
| 2025 | 6 | 3 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multifunctional thermal exposure indicator16 Dec 2025US 12,498,274 B2
- Activatable print medium23 Sep 2025US 12,422,418 B2Zebra Technologies Corporation
- Detecting impact and heat events on products and generating a diagnosis2 Sep 2025US 12,405,166 B2Lenovo (United States) Inc.
- Time-temperature indicator29 Apr 2025US 12,287,245 B2Eos GmbH
- Detection tool and detection method1 Apr 2025US 12,265,034 B2J. Morita Mfg. Corp.
- Activatable environmental exposure indicator with tailorable response conditions20 Aug 2026US 2026/0243610 A1Zebra Technologies Corporation
- Digitalization, automation and optimization of time-lapse geochemistry (tlg) workflow to optimize development plans for unconventional reservoirs having multiple production zones23 Jul 2026US 2026/0210920 A1ConocoPhillips Company
- Multifunctional thermal exposure indicator for objects26 Mar 2026US 2026/0085983 A1
- Anti-freeze solutions for visual indicators of biospecimen time-temperature exposure1 Jan 2026US 2026/0002918 A1Arizona Board of Regents on behalf of Arizona State University
- Method for quantitatively detecting hydroquinone6 Feb 2025US 2025/0044266 A1Anhui University
Most cited
By later US patents
- Color changing device for monitoring shelf-life of perishable products367US 5,053,339 AJ P Labs Inc. · 1991
- Activatable time-temperature indicator system192US 6,544,925 B1LifeLines Technology, Inc. · 2003
- Moving boundary device for monitoring shelf-life of a perishable product190US 5,045,283 AJP Labs, Inc. · 1991
- Time-temperature history indicators173US 3,999,946 AAllied Chemical Corporation · 1976
- Activatable time-temperature indicator147US 4,812,053 ALifeLines Technology, Inc. · 1989