B41M 5/136
Organic colour formers
Official title: Organic colour formers, e.g. leuco dyes
B41M5/136 (Organic colour formers) appears on 455 US grants and 31 published applications in this corpus.
Search patents in B41M- Granted patents
- 455
- Published applications
- 31
- Assignees
- 79
- Inventors
- 373
- Latest grant
- 28 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 31 | 0 |
| 1977 | 23 | 0 |
| 1978 | 18 | 0 |
| 1979 | 10 | 0 |
| 1980 | 20 | 0 |
| 1981 | 30 | 0 |
| 1982 | 24 | 0 |
| 1983 | 14 | 0 |
| 1984 | 18 | 0 |
| 1985 | 19 | 0 |
| 1986 | 16 | 0 |
| 1987 | 30 | 0 |
| 1988 | 21 | 0 |
| 1989 | 29 | 0 |
| 1990 | 18 | 0 |
| 1991 | 23 | 0 |
| 1992 | 18 | 0 |
| 1993 | 21 | 0 |
| 1994 | 19 | 0 |
| 1995 | 10 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 0 |
| 2004 | 0 | 5 |
| 2005 | 1 | 1 |
| 2006 | 3 | 1 |
| 2007 | 5 | 2 |
| 2008 | 0 | 3 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 2 | 2 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 2 | 4 |
| 2016 | 1 | 2 |
| 2017 | 3 | 2 |
| 2018 | 1 | 1 |
| 2019 | 0 | 2 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Primers with improved reflective and thermally insulative properties for microcapsule imaging system28 Jan 2025US 12,210,282 B2Polaroid IP B. V.
- Recording material and recording sheet28 Jun 2022US 11,370,240 B2Nippon Soda Co., Ltd.
- Pressure sensitive coating for image forming26 Jun 2018US 10,005,304 B2Chromatic Technologies, Inc.
- Marking system17 Oct 2017US 9,790,383 B2Crayola LLC
- Colour-forming materials, contact recording devices and pressure recording devices28 Mar 2017US 9,604,485 B2Active Device Development Limited
- Primers with improved reflective and thermally insulative properties for microcapsule imaging system7 Dec 2023US 2023/0393460 A1Polaroid IP B. V.
- Recording material and recording sheet19 Dec 2019US 2019/0381820 A1Nippon Soda Co., Ltd.
- Pressure indicating devices30 May 2019US 2019/0160845 A1Active Device Developments Ltd.
- Pressure imaging and indicating materials and devices19 Apr 2018US 2018/0104973 A1
- Pressure Sensitive Coating For Image Forming6 Jul 2017US 2017/0190198 A1Chromatic Technologies, Inc.
Most cited
By later US patents
- Image recording members70US 4,390,616 AFuji Photo Film Co., Ltd. · 1983
- Recording material66US 5,372,917 AKanzaki Paper Manufacturing Co., Ltd. · 1994
- Recording material and process of using61US 5,196,297 APolaroid Corporation · 1993
- Recording material59US 4,985,345 ARicoh Company, Ltd. · 1991
- Method of quantitatively measuring an oxidative substance using triphenyl methane type leuco-pigment as a coloring substance45US 4,778,753 AWako Pure Chemical Industries, Ltd. · 1988