B41M 3/142
Using chemical colour-formers or chemical reactions
Official title: {using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes}
B41M3/142 (Using chemical colour-formers or chemical reactions) appears on 163 US grants and 94 published applications in this corpus.
Search patents in B41M- Granted patents
- 163
- Published applications
- 94
- Assignees
- 89
- Inventors
- 280
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 9 | 0 |
| 1996 | 9 | 0 |
| 1997 | 12 | 0 |
| 1998 | 11 | 0 |
| 1999 | 7 | 0 |
| 2000 | 14 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 2 |
| 2003 | 4 | 5 |
| 2004 | 5 | 2 |
| 2005 | 3 | 4 |
| 2006 | 0 | 3 |
| 2007 | 0 | 3 |
| 2008 | 2 | 1 |
| 2009 | 1 | 2 |
| 2010 | 2 | 6 |
| 2011 | 1 | 1 |
| 2012 | 3 | 4 |
| 2013 | 2 | 6 |
| 2014 | 7 | 2 |
| 2015 | 7 | 7 |
| 2016 | 1 | 7 |
| 2017 | 4 | 5 |
| 2018 | 8 | 14 |
| 2019 | 8 | 4 |
| 2020 | 3 | 7 |
| 2021 | 3 | 2 |
| 2022 | 5 | 0 |
| 2023 | 1 | 2 |
| 2024 | 2 | 3 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Non-fungible anti-counterfeit photo-chromic nano-micro three-dimensional tags/labels12 Aug 2025US 12,387,625 B2
- Time-temperature indicator based on increased thermal reactivity of a diacetylene upon melt recrystallization22 Oct 2024US 12,123,858 B2JP Laboratories, Inc.
- Process for producing dichroic security features for securing value documents23 Jul 2024US 12,043,047 B2Sicpa Holding SA
- Method for producing water-insoluble quantum dot patterns5 Sep 2023US 11,745,529 B2Omya International AG
- Tamper-proof medium for thermal printing13 Dec 2022US 11,524,514 B2Omya International AG
- Systems and methods for implementing a micro-symbol-based security mark14 May 2026US 2026/0131589 A1Xerox Corporation
- Variable-appearance laser marking over printed layers24 Apr 2025US 2025/0130502 A1Thales Dis France SAS
- Time-temperature indicator based on increased thermal reactivity of a diacetylene upon melt recrystallization19 Dec 2024US 2024/0418691 A1JP Laboratories, Inc.
- Non-fungible anti-counterfeit photo-chromic nano-micro three-dimensional tags/labels17 Oct 2024US 2024/0346958 A1
- A method for numbering, QR coding and/or barcoding of banknotes using laser writing2 May 2024US 2024/0140126 A1Gleitsmann Security Inks GmbH
Most cited
By later US patents
- Negotiable document having enhanced security for deterring fraud by use of a thermochromatic fingerprint image246US 6,030,000 ADiamond Security, Inc. · 2000
- Marking of articles with photochromic compounds93US 4,927,180 APlessey Overseas Limited · 1990
- Business record having a multicolor imagable surface90US 5,524,934 AThe Standard Register Company · 1996
- Heat sensitive system and use thereof71US 5,427,415 AWallace Computer Services, Inc. · 1995
- Business record having a thermally imagable surface71US 5,984,363 AThe Standard Register Company · 1999