C02F 2101/308
Dyes
Official title: {Dyes; Colorants; Fluorescent agents}
C02F2101/308 (Dyes) appears on 392 US grants and 529 published applications in this corpus.
Search patents in C02F- Granted patents
- 392
- Published applications
- 529
- Assignees
- 323
- Inventors
- 1,341
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 1 |
| 2003 | 2 | 4 |
| 2004 | 4 | 5 |
| 2005 | 1 | 4 |
| 2006 | 1 | 13 |
| 2007 | 2 | 4 |
| 2008 | 3 | 14 |
| 2009 | 6 | 12 |
| 2010 | 7 | 7 |
| 2011 | 8 | 12 |
| 2012 | 4 | 12 |
| 2013 | 3 | 7 |
| 2014 | 7 | 16 |
| 2015 | 7 | 21 |
| 2016 | 16 | 27 |
| 2017 | 14 | 21 |
| 2018 | 16 | 25 |
| 2019 | 14 | 40 |
| 2020 | 27 | 27 |
| 2021 | 40 | 44 |
| 2022 | 31 | 44 |
| 2023 | 42 | 56 |
| 2024 | 54 | 40 |
| 2025 | 51 | 38 |
| 2026 | 17 | 35 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filter cartridge and filter having same25 Aug 2026US 12,714,954 B2Solventum Intellectual Properties Company
- Water treatment and purification method25 Aug 2026US 12,715,781 B2Imam Abdulrahman Bin Faisal University
- Synthesis of nanophotocatalyst for sewage water treatment4 Aug 2026US 12,698,224 B2King Saud University
- Water purification method using biochar layered double hydroxide composite21 Jul 2026US 12,685,994 B2Imam Abdulrahman Bin Faisal University
- Method for dye degradation in aqueous solution14 Jul 2026US 12,678,772 B2Imam Abdulrahman Bin Faisal University
- Photothermal polymeric aerogels for wastewater detoxification and water recycling8 Oct 2026US 2026/0308020 A1University of Kentucky Research Foundation
- Method for Treating Phosphorus-Containing Wastewater Produced During Preparation of Sulfonamide Compound8 Oct 2026US 2026/0308035 A1Nanhai Beisha Pharmaceutical Co., Ltd.
- Process and system for degrading a chemical compound in a liquid stream1 Oct 2026US 2026/0296942 A1Aquasoil S.R.L.
- Method of preparing pore-adjustable carbon molecular sieve by heavy oil binary activation and application thereof27 Aug 2026US 2026/0250137 A1Southeast University
- A treatment method of at least one colloidal toc present in wastewater27 Aug 2026US 2026/0250163 A1Snf Group
Most cited
By later US patents
- Modified polysaccharides47US 7,727,945 B2Akzo Nobel N. V. · 2010
- Method for recovering and separating metals from waste streams29US 6,254,782 B12001
- Treating paint waste solids27US 4,100,066 ACarrier Drysys Limited · 1978
- Method and apparatus for treatment of contaminated liquid23US 7,981,301 B22011
- Structure of an electrode for use in an electrolytic cell20US 7,611,611 B2Oro AS · 2009