C09B 11/28
Pyronines
Official title: Pyronines {; Xanthon, thioxanthon, selenoxanthan, telluroxanthon dyes}
C09B11/28 (Pyronines) appears on 151 US grants and 161 published applications in this corpus.
Search patents in C09B- Granted patents
- 151
- Published applications
- 161
- Assignees
- 93
- Inventors
- 469
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 1 | 2 |
| 2005 | 2 | 2 |
| 2006 | 2 | 4 |
| 2007 | 0 | 2 |
| 2008 | 1 | 5 |
| 2009 | 4 | 1 |
| 2010 | 3 | 7 |
| 2011 | 1 | 5 |
| 2012 | 5 | 0 |
| 2013 | 3 | 4 |
| 2014 | 6 | 9 |
| 2015 | 4 | 11 |
| 2016 | 8 | 10 |
| 2017 | 11 | 9 |
| 2018 | 10 | 14 |
| 2019 | 13 | 12 |
| 2020 | 5 | 11 |
| 2021 | 7 | 9 |
| 2022 | 3 | 5 |
| 2023 | 3 | 8 |
| 2024 | 9 | 11 |
| 2025 | 6 | 10 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Near infrared dyes for biological imaging and optoelectronic devices15 Sep 2026US 12,735,573 B2Mississippi State University
- Methods of forming an object in a volume of a photohardenable composition, photohardenable compositions, and photoinitiators25 Aug 2026US 12,715,998 B2Quadratic 3D, Inc.
- Photoactive fluorescent compounds and use thereof for labeling of proteins14 Jul 2026US 12,681,018 B2Eikon Therapeutics, Inc.
- Dicationic fluorescent dyes23 Jun 2026US 12,662,626 B2Roche Molecular Systems, Inc.
- Deuterated fluorophores17 Feb 2026US 12,552,938 B2Howard Hughes Medical Institute
- Aza[3.2.1]bridged ring substituted fluorescent dye and preparation method and use thereof3 Sep 2026US 2026/0258295 A1Nanjing Genvivo Biotech Co., Ltd.
- Photoactive fluorescent compounds and use thereof for labeling of proteins3 Sep 2026US 2026/0259217 A1Eikon Therapeutics, Inc.
- Photoactive fluorescent compounds and use thereof for labeling of proteins13 Aug 2026US 2026/0234403 A1
- Silicon-substituted rhodamine dyes and dye conjugates30 Jul 2026US 2026/0217981 A1Life Technologies Corporation
- Dynamic Covalent Chemistry of Spiropyrans for Synthesis of Photoswitchable Photoinitiators and Uses Thereof, and Process for Locally Polymerizing a Starting Material by Dual Color Photopolymerization16 Apr 2026US 2026/0102962 A1xolo GmbH
Most cited
By later US patents
- Methods of using dyes in association with nucleic acid staining or detection and associated technology187US 7,803,943 B2Biotium, Inc. · 2010
- Methods of using dyes in association with nucleic acid staining or detection and associated technology184US 7,601,498 B2Biotium, Inc. · 2009
- Xanthene dyes that emit to the red of fluorescein136US 5,066,580 ABecton, Dickinson and Company · 1991
- Xanthene dyes having a fused (C) benzo ring128US 4,945,171 AMolecular Probes, Inc. · 1990
- Fluorone and pyronin y derivatives126US 5,451,343 ASpectra Group Limited, Inc. · 1995