D06L 4/60
Optical bleaching or brightening
D06L4/60 (Optical bleaching or brightening) appears on 350 US grants and 106 published applications in this corpus.
Search patents in D06L- Granted patents
- 350
- Published applications
- 106
- Assignees
- 87
- Inventors
- 599
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 29 | 0 |
| 1977 | 27 | 0 |
| 1978 | 19 | 0 |
| 1979 | 13 | 0 |
| 1980 | 17 | 0 |
| 1981 | 14 | 0 |
| 1982 | 18 | 0 |
| 1983 | 14 | 0 |
| 1984 | 14 | 0 |
| 1985 | 12 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 8 | 0 |
| 1989 | 6 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 8 | 0 |
| 1996 | 3 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 12 | 0 |
| 2001 | 6 | 3 |
| 2002 | 6 | 4 |
| 2003 | 2 | 5 |
| 2004 | 5 | 10 |
| 2005 | 6 | 6 |
| 2006 | 3 | 10 |
| 2007 | 4 | 5 |
| 2008 | 0 | 7 |
| 2009 | 5 | 5 |
| 2010 | 5 | 5 |
| 2011 | 4 | 2 |
| 2012 | 2 | 2 |
| 2013 | 3 | 3 |
| 2014 | 4 | 6 |
| 2015 | 3 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 15 |
| 2019 | 3 | 1 |
| 2020 | 7 | 4 |
| 2021 | 2 | 5 |
| 2022 | 1 | 0 |
| 2023 | 1 | 2 |
| 2024 | 2 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- D06L 4/664Preparations of optical brighteners117
- D06L 4/614In aqueous solvents107
- D06L 4/65With mixtures of optical brighteners51
- D06L 4/657Combined with other treatments48
- D06L 4/686Fugitive optical brightening27
- D06L 4/671Optical brightening assistants25
- D06L 4/643Wherein the brightener is introduced in a gaseous environment or in solid8
- D06L 4/607In organic solvents7
All 9 subgroupsShow fewer
Recent patents
- Fabric and method for obtaining said fabric6 Oct 2026US 12,753,538 B2Siretessile S.R.L.
- Composition comprising hueing agent28 Jan 2025US 12,209,231 B2Milliken & Company
- Leuco colorants as bluing agents in laundry care compositions30 Jul 2024US 12,049,608 B2The Procter & Gamble Company
- Bleaching apparatus and bleaching method of clothes23 Apr 2024US 11,965,146 B2Kuwahara Co., Ltd
- Composition comprising hueing agent8 Aug 2023US 11,718,814 B2Milliken & Company
- A method of treating regenerated cellulose fiber for textile and non-woven applications20 Aug 2026US 2026/0243016 A1Asia Pacific Rayon Limited
- A process for decolouring textiles2 Jan 2025US 2025/0003144 A1Textile Change Aps
- Composition Comprising Hueing Agent28 Nov 2024US 2024/0392217 A1Milliken & Company
- Fabric and method for obtaining said fabric24 Oct 2024US 2024/0352637 A1Siretessile S.R.L.
- Composition Comprising Hueing Agent26 Oct 2023US 2023/0340371 A1Milliken & Company
Most cited
By later US patents
- Alkoxylated cationic detergency ingredients164US 6,136,769 AThe Procter & Gamble Company · 2000
- Foams for treating fabrics67US 4,099,913 AUnion Carbide Corporation · 1978
- Process for quenching or suppressing the fluorescence of substrates treated with fluorescent whitening agents63US 4,950,304 ACiba-Geigy Corporation · 1990
- Method for authenticating a textile product and a thread and a woven label usable therewith58US 6,086,966 ANocopi Technologies, Inc. · 2000
- Stable composition for treating textile substrates47US 4,460,374 ACiba-Geigy Corporation · 1984