B41M 5/30
Using chemical colour formers
Official title: using chemical colour formers (B41M5/34 takes precedence)
B41M5/30 (Using chemical colour formers) appears on 1,898 US grants and 890 published applications in this corpus.
Search patents in B41M- Granted patents
- 1,898
- Published applications
- 890
- Assignees
- 336
- Inventors
- 2,208
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 23 | 0 |
| 1978 | 14 | 0 |
| 1979 | 16 | 0 |
| 1980 | 25 | 0 |
| 1981 | 35 | 0 |
| 1982 | 33 | 0 |
| 1983 | 27 | 0 |
| 1984 | 39 | 0 |
| 1985 | 69 | 0 |
| 1986 | 56 | 0 |
| 1987 | 47 | 0 |
| 1988 | 55 | 0 |
| 1989 | 77 | 0 |
| 1990 | 50 | 0 |
| 1991 | 69 | 0 |
| 1992 | 68 | 0 |
| 1993 | 62 | 0 |
| 1994 | 57 | 0 |
| 1995 | 73 | 0 |
| 1996 | 49 | 0 |
| 1997 | 48 | 0 |
| 1998 | 52 | 0 |
| 1999 | 53 | 0 |
| 2000 | 40 | 0 |
| 2001 | 49 | 17 |
| 2002 | 41 | 40 |
| 2003 | 35 | 57 |
| 2004 | 44 | 46 |
| 2005 | 32 | 61 |
| 2006 | 31 | 42 |
| 2007 | 32 | 66 |
| 2008 | 26 | 46 |
| 2009 | 33 | 42 |
| 2010 | 19 | 36 |
| 2011 | 28 | 36 |
| 2012 | 41 | 25 |
| 2013 | 38 | 30 |
| 2014 | 42 | 36 |
| 2015 | 19 | 27 |
| 2016 | 33 | 41 |
| 2017 | 40 | 30 |
| 2018 | 31 | 34 |
| 2019 | 26 | 17 |
| 2020 | 11 | 35 |
| 2021 | 15 | 29 |
| 2022 | 20 | 21 |
| 2023 | 11 | 22 |
| 2024 | 21 | 29 |
| 2025 | 16 | 18 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat-sensitive recording medium1 Sep 2026US 12,722,411 B2Osaka Sealing Printing Co., Ltd.
- Composition4 Aug 2026US 12,697,831 B2Datalase Ltd.
- Image forming method, image forming apparatus, and image forming system2 Jun 2026US 12,644,226 B2Konica Minolta, Inc.
- Thermosensitive recording layer forming liquid, thermosensitive recording medium and production method thereof, and image recording method12 May 2026US 12,623,478 B2Ricoh Company, Ltd.
- Direct thermal and thermal transfer label combination3 Mar 2026US 12,565,055 B2Iconex LLC
- Image forming method and image forming apparatus8 Oct 2026US 2026/0307414 A1Brother Kogyo Kabushiki Kaisha
- Composition20 Aug 2026US 2026/0241736 A1Datalase Ltd.
- Thermal recording material30 Apr 2026US 2026/0116113 A1Osaka Sealing Printing Co., Ltd.
- Reversibly thermochromic composition, reversibly thermochromic microcapsule pigment encapsulating reversibly thermochromic composition, and writing instrument using reversibly thermochromic microcapsule pigment5 Mar 2026US 2026/0062580 A1KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)
- Heat-sensitive recording medium1 Jan 2026US 2026/0001368 A1Osaka Sealing Printing Co., Ltd.
Most cited
By later US patents
- Optical storage identification card and read/write system234US 4,663,518 APolaroid Corporation · 1987
- Electronic microcopier apparatus189US 4,523,235 A1985
- Thermochromic materials183US 4,028,118 AThe Pilot Ink Co., Ltd. · 1977
- Thermal imaging method148US 4,602,263 APolaroid Corporation · 1986
- Reversible thermosensitive recording medium and image forming and erasing method using the recording medium123US 6,579,826 B2Ricoh Company, Ltd. · 2003