A61K 2800/438
Thermochromatic
Official title: Thermochromatic; Photochromic; Phototropic
A61K2800/438 (Thermochromatic) appears on 91 US grants and 120 published applications in this corpus.
Search patents in A61K- Granted patents
- 91
- Published applications
- 120
- Assignees
- 60
- Inventors
- 204
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 0 |
| 2002 | 6 | 4 |
| 2003 | 5 | 10 |
| 2004 | 4 | 8 |
| 2005 | 1 | 5 |
| 2006 | 1 | 9 |
| 2007 | 4 | 5 |
| 2008 | 6 | 9 |
| 2009 | 0 | 4 |
| 2010 | 3 | 7 |
| 2011 | 1 | 2 |
| 2012 | 4 | 4 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 5 |
| 2017 | 7 | 2 |
| 2018 | 2 | 4 |
| 2019 | 0 | 3 |
| 2020 | 1 | 3 |
| 2021 | 0 | 5 |
| 2022 | 4 | 11 |
| 2023 | 4 | 6 |
| 2024 | 2 | 1 |
| 2025 | 5 | 4 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cosmetic and dermatological compositions6 Oct 2026US 12,751,904 B2Northeastern University
- Multifunctional facial patch product10 Mar 2026US 12,569,413 B1Aso LLC
- Cosmetic and dermatological compositions6 Jan 2026US 12,514,797 B2Northeastern University
- Transparent colored cosmetic ingredient for cosmetic products, possibly capable of automatically changing color when irradiated by ultraviolet light6 Jan 2026US 12,514,804 B2INTERCOS S. p. A.
- 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
- Fluorine-free diarylethene photochromic compound system for reversible hair coloration8 Oct 2026US 2026/0306383 A1School of Materials Science and Engineering, Nanyang Technological University
- Method of using color changing compounds in light based treatments8 Oct 2026US 2026/0306389 A1The Gillette Company
- Cosmetic and Dermatological Compositions30 Apr 2026US 2026/0115110 A1Northeastern University
- Xanthommatin as Color Additive for Food, Beverage and Drug Compositions2 Apr 2026US 2026/0090963 A1Northeastern University
- 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)
Most cited
By later US patents
- Multi-wavelength oral phototherapy applicator127US 7,422,598 B2Palomar Medical Technologies, Inc. · 2008
- Topical compositions with a reversible photochromic ingredient117US 6,531,118 B1Avon Products, Inc. · 2003
- Dental phototherapy methods and compositions117US 7,354,448 B2Palomar Medical Technologies, Inc. · 2008
- Light emitting toothbrush for oral phototherapy109US 7,223,270 B22007
- Permanent, removable tissue markings105US 6,800,122 B2Freedom-2, Inc. · 2004