C09B 11/08
Phthaleins
Official title: Phthaleins; {Phenolphthaleins; Fluorescein}
C09B11/08 (Phthaleins) appears on 128 US grants and 137 published applications in this corpus.
Search patents in C09B- Granted patents
- 128
- Published applications
- 137
- Assignees
- 99
- Inventors
- 336
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 4 | 5 |
| 2003 | 4 | 3 |
| 2004 | 0 | 6 |
| 2005 | 5 | 11 |
| 2006 | 3 | 8 |
| 2007 | 4 | 5 |
| 2008 | 1 | 8 |
| 2009 | 3 | 5 |
| 2010 | 3 | 5 |
| 2011 | 6 | 5 |
| 2012 | 2 | 5 |
| 2013 | 3 | 4 |
| 2014 | 5 | 5 |
| 2015 | 4 | 4 |
| 2016 | 5 | 10 |
| 2017 | 10 | 8 |
| 2018 | 5 | 7 |
| 2019 | 4 | 7 |
| 2020 | 5 | 5 |
| 2021 | 4 | 3 |
| 2022 | 1 | 6 |
| 2023 | 4 | 7 |
| 2024 | 3 | 2 |
| 2025 | 2 | 3 |
| 2026 | 4 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Chemiluminescent compounds for multiplexing1 Sep 2026US 12,724,033 B2Abbott Laboratories
- Fluorescent dye molecules for tracer applications in subterranean formations19 May 2026US 12,631,612 B2Saudi Arabian Oil Company
- Activity-based probes with unnatural amino acids to monitor proteasome activity5 May 2026US 12,618,847 B2Purdue Research Foundation
- Excitonic quantum computing via aggregate-aggregate coupling10 Feb 2026US 12,545,700 B2Boise State University
- Expansion microscopy compatible anchorable HandE staining for histopathology18 Feb 2025US 12,228,481 B2Expansion Technologies
- Compositions for Conjugating a Sulfonephthalein Dye to a Substrate10 Jul 2025US 2025/0224384 A1Waterguru Inc.
- Organic dye composition, and spray agent comprising same15 May 2025US 2025/0154358 A1Panasonic Intellectual Property Management Co., Ltd.
- Colorimetric radiation detector2 Jan 2025US 2025/0002780 A1National Technology & Engineering Solutions of Sandia, LLC
- Method of manipulating hydrophilicity and hydrophobicity of conventional dye molecules for tracer applications15 Aug 2024US 2024/0270970 A1Saudi Arabian Oil Company
- N-(2-aminoethyl)morpholine-based rna analogs, method for the preparation and use thereof6 Jun 2024US 2024/0182512 A1Uniwersytet Warszawski
Most cited
By later US patents
- 4,7-dichlorofluorescein dyes as molecular probes318US 5,188,934 AApplied Biosystems, LLC · 1993
- Energy transfer dyes with enchanced fluorescence280US 5,800,996 AThe Perkin-Elmer Corporation · 1998
- Aromatic-substituted xanthene dyes236US 6,008,379 AThe Perkin-Elmer Corporation · 1999
- Sulfonated xanthene derivatives204US 6,130,101 AMolecular Probes, Inc. · 2000
- Dye labeled imidazoquinoline compounds201US 6,376,669 B13M Innovative Properties Company · 2002