C09B 7/02
Bis-indole indigos
C09B7/02 (Bis-indole indigos) appears on 76 US grants and 46 published applications in this corpus.
Search patents in C09B- Granted patents
- 76
- Published applications
- 46
- Assignees
- 46
- Inventors
- 175
- Latest grant
- 8 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 6 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 2 |
| 2002 | 3 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 4 |
| 2018 | 0 | 2 |
| 2019 | 4 | 5 |
| 2020 | 4 | 8 |
| 2021 | 6 | 3 |
| 2022 | 4 | 2 |
| 2023 | 1 | 3 |
| 2024 | 3 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for the preparation of Indigotindisulfonate sodium (indigo carmine)8 Apr 2025US 12,269,954 B2Provepharm Life Solutions
- 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.
- Systems and methods for preparing deoxygenated dye compositions4 Jun 2024US 12,000,084 B2Indigo Mill Designs, Inc.
- Process for the preparation of indigotindisulfonate sodium (indigo carmine)19 Dec 2023US 11,845,867 B2Provepharm Life Solutions
- 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
- Fluorescent carbamate-modified phthalocyanine pigments46US 5,811,543 ACiba Speciality Chemicals Corporation · 1998
- Photoelectric material using organic photosensitising dyes and manufacturing method thereof41US 6,043,428 ASharp Kabushiki Kaisha · 2000
- Fluorescent quinacridone pigments31US 5,561,232 ACiba-Geigy Corporation · 1996
- Oxygen indicator adapted for printing or coating and oxygen-indicating device30US 4,349,509 AMitsubishi Gas Chemical Company, Inc. · 1982
- Microbial production of indigo28US 4,520,103 AAmgen Inc. · 1985