B41M 5/327
With a lactone or lactam ring
Official title: with a lactone or lactam ring
B41M5/327 (With a lactone or lactam ring) appears on 456 US grants and 209 published applications in this corpus.
Search patents in B41M- Granted patents
- 456
- Published applications
- 209
- Assignees
- 111
- Inventors
- 636
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 14 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 10 | 0 |
| 1981 | 12 | 0 |
| 1982 | 7 | 0 |
| 1983 | 5 | 0 |
| 1984 | 9 | 0 |
| 1985 | 16 | 0 |
| 1986 | 15 | 0 |
| 1987 | 22 | 0 |
| 1988 | 13 | 0 |
| 1989 | 27 | 0 |
| 1990 | 14 | 0 |
| 1991 | 23 | 0 |
| 1992 | 19 | 0 |
| 1993 | 19 | 0 |
| 1994 | 15 | 0 |
| 1995 | 14 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 10 | 0 |
| 2001 | 4 | 1 |
| 2002 | 5 | 2 |
| 2003 | 6 | 10 |
| 2004 | 4 | 16 |
| 2005 | 10 | 9 |
| 2006 | 8 | 8 |
| 2007 | 12 | 13 |
| 2008 | 2 | 13 |
| 2009 | 7 | 5 |
| 2010 | 2 | 5 |
| 2011 | 2 | 6 |
| 2012 | 2 | 3 |
| 2013 | 6 | 11 |
| 2014 | 14 | 12 |
| 2015 | 7 | 5 |
| 2016 | 8 | 8 |
| 2017 | 6 | 6 |
| 2018 | 10 | 9 |
| 2019 | 5 | 5 |
| 2020 | 1 | 14 |
| 2021 | 6 | 13 |
| 2022 | 7 | 7 |
| 2023 | 6 | 5 |
| 2024 | 8 | 10 |
| 2025 | 7 | 7 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Composition4 Aug 2026US 12,697,831 B2Datalase Ltd.
- Direct thermal recording media with diarylurea combinations for oil resistance10 Feb 2026US 12,545,045 B2Appvion, Inc.
- Drawing system and drawing method11 Nov 2025US 12,466,196 B2Sony Group Corporation
- Reversibly thermochromic composition, reversibly thermochromic microcapsule pigment encapsulating reversibly thermochromic composition, and writing instrument using reversibly thermochromic microcapsule pigment4 Nov 2025US 12,460,099 B2Kabushiki Kaisha Pilot Corporation
- Heat-sensitive recording material comprising phenol-free organic colour developers28 Oct 2025US 12,454,144 B2Mitsubishi HiTec Paper Europe GmbH
- 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.
- Heat sensitive recording medium1 Jan 2026US 2026/0002038 A1Osaka Sealing Printing Co., Ltd.
Most cited
By later US patents
- Image recording members70US 4,390,616 AFuji Photo Film Co., Ltd. · 1983
- Recording material and process of using61US 5,196,297 APolaroid Corporation · 1993
- Recording material59US 4,985,345 ARicoh Company, Ltd. · 1991
- Thermal imaging system59US 6,801,233 B2Polaroid Corporation · 2004
- Chromogenic fluoran derivatives and the preparation and use thereof44US 3,959,571 AShin Nisso Kako Co., Ltd. · 1976