A61K 2800/432
Direct dyes
A61K2800/432 (Direct dyes) appears on 541 US grants and 786 published applications in this corpus.
Search patents in A61K- Granted patents
- 541
- Published applications
- 786
- Assignees
- 136
- Inventors
- 1,009
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 3 |
| 2003 | 1 | 3 |
| 2004 | 1 | 8 |
| 2005 | 5 | 8 |
| 2006 | 1 | 2 |
| 2007 | 5 | 1 |
| 2008 | 1 | 4 |
| 2009 | 2 | 12 |
| 2010 | 9 | 16 |
| 2011 | 18 | 15 |
| 2012 | 17 | 15 |
| 2013 | 9 | 17 |
| 2014 | 15 | 19 |
| 2015 | 7 | 47 |
| 2016 | 27 | 75 |
| 2017 | 39 | 75 |
| 2018 | 49 | 40 |
| 2019 | 49 | 48 |
| 2020 | 38 | 70 |
| 2021 | 53 | 51 |
| 2022 | 49 | 85 |
| 2023 | 32 | 56 |
| 2024 | 31 | 50 |
| 2025 | 41 | 40 |
| 2026 | 16 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for dyeing keratinous material, in particular human hair6 Oct 2026US 12,751,907 B2Henkel AG & Co. KGaA
- Aqueous oxidative composition comprising xanthine derivatives8 Sep 2026US 12,728,082 B2Kao Corporation
- Process for producing hair treatment products by mixing organic C1-C6-alkoxysilanes and alkalizing agents in specific molar ratios28 Jul 2026US 12,691,049 B2Henkel AG & Co. KGaA
- Hair colorant compositions21 Jul 2026US 12,685,705 B2
- Hair treatment method30 Jun 2026US 12,667,536 B2Kao Corporation
- Dyeing product for keratin fibers comprising ammonium salts1 Oct 2026US 2026/0294754 A1Kao Corporation
- Method for demi-permanent hair coloring17 Sep 2026US 2026/0272800 A1BEAUTY & BUSINESS S.p.A.
- Process for removing the colour from previously dyed keratinous hair fibres27 Aug 2026US 2026/0248268 A1L'oreal
- Use of a composition comprising an alkyl or alkylene carbonate for removing the colour from previously dyed keratinous hair fibres without damaging the keratinous hair fibres27 Aug 2026US 2026/0248703 A1L'oreal
- Nutrient-based temporary tattoo ink composition6 Aug 2026US 2026/0224468 A1
Most cited
By later US patents
- Two-stage process for dyeing keratin fibres68US 4,425,132 AL'oreal · 1984
- Dyeing composition for dyeing keratinous fibers comprising at least one particular dicationic diazo dye65US 6,884,265 B2L'oreal · 2005
- System and method for on-site formulation of personalized color-maintaining shampoo products for individual users62US 5,643,341 AArtec Systems Group, Inc. · 1997
- Hair dye composition having a particular buffer capacity and containing an alkylene carbonate47US 6,248,314 B1Kao Corporation · 2001
- Process for the two-step direct dyeing of keratin fibres using basic direct dyes37US 6,045,591 AL'oreal · 2000