C09B 7/00
Indigoid dyes
C09B7/00 (Indigoid dyes) appears on 149 US grants and 97 published applications in this corpus.
Search patents in C09B- Granted patents
- 149
- Published applications
- 97
- Assignees
- 91
- Inventors
- 371
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 6 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 2 |
| 2002 | 5 | 2 |
| 2003 | 2 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 3 |
| 2006 | 1 | 0 |
| 2007 | 1 | 4 |
| 2008 | 2 | 3 |
| 2009 | 1 | 2 |
| 2010 | 0 | 2 |
| 2011 | 3 | 9 |
| 2012 | 4 | 11 |
| 2013 | 4 | 2 |
| 2014 | 6 | 1 |
| 2015 | 2 | 2 |
| 2016 | 2 | 2 |
| 2017 | 0 | 4 |
| 2018 | 2 | 3 |
| 2019 | 4 | 7 |
| 2020 | 5 | 10 |
| 2021 | 6 | 6 |
| 2022 | 4 | 6 |
| 2023 | 4 | 3 |
| 2024 | 5 | 3 |
| 2025 | 2 | 1 |
| 2026 | 1 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Use of encapsulated natural colors17 Mar 2026US 12,577,506 B2Sensient Colors UK Ltd
- Process for the preparation of Indigotindisulfonate sodium (indigo carmine)8 Apr 2025US 12,269,954 B2Provepharm Life Solutions
- Process and apparatus for dyeing textiles11 Mar 2025US 12,247,350 B2Rijksuniversiteit Groningen
- Protecting group chemistry for clean, reductant-free dyeing24 Sep 2024US 12,098,405 B2The Regents of the University of California
- Process for purifying leucoindigo salt solutions using an inert gas2 Jul 2024US 12,024,633 B2Bann Quimica Ltda.
- Novel indoline derivative and use thereof27 Aug 2026US 2026/0250247 A1Ck Regeon Inc.
- Biosynthesis of 3-indoxyl phosphate from 3-hydroxyindole using kinases and indigo dyeing method using the same13 Aug 2026US 2026/0234679 A1Seoul National University R&Db Foundation
- Dye dispersion, method for preparing the same, and dyeing method2 Jul 2026US 2026/0185299 A1Industrial Technology Research Institute
- Biosynthesis of indigo dyestuff with tunable color hue4 Jun 2026US 2026/0152772 A1Nano and Advanced Materials Institute Limited
- Genetically modified host cells producing violacein, analogues, and derivatives thereof2 Apr 2026US 2026/0092179 A1
Most cited
By later US patents
- Dichroic light polarizers162US 6,049,428 AOptiva, Inc. · 2000
- Method and materials for thermostable and lightfast dichroic light polarizers82US 5,739,296 ARussian Technology Group · 1998
- Method for thermostable and lightfast dichroic light polarizers54US 6,174,394 B1Optiva, Inc. · 2001
- Fluorescent carbamate-modified phthalocyanine pigments46US 5,811,543 ACiba Speciality Chemicals Corporation · 1998
- Pigment compositions41US 4,310,359 AToyo Ink Manufacturing Co., Ltd. · 1982