C09B 11/24
Phthaleins containing amino groups
Official title: Phthaleins containing amino groups {; Phthalanes; Fluoranes; Phthalides; Rhodamine dyes; Phthaleins having heterocyclic aryl rings; Lactone or lactame forms of triarylmethane dyes}
C09B11/24 (Phthaleins containing amino groups) appears on 605 US grants and 643 published applications in this corpus.
Search patents in C09B- Granted patents
- 605
- Published applications
- 643
- Assignees
- 299
- Inventors
- 1,326
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 12 | 0 |
| 1982 | 8 | 0 |
| 1983 | 8 | 0 |
| 1984 | 4 | 0 |
| 1985 | 10 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 9 | 0 |
| 1995 | 7 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 8 | 0 |
| 2001 | 9 | 6 |
| 2002 | 7 | 6 |
| 2003 | 6 | 10 |
| 2004 | 4 | 16 |
| 2005 | 8 | 21 |
| 2006 | 14 | 26 |
| 2007 | 14 | 23 |
| 2008 | 17 | 26 |
| 2009 | 13 | 25 |
| 2010 | 13 | 17 |
| 2011 | 13 | 30 |
| 2012 | 13 | 20 |
| 2013 | 23 | 31 |
| 2014 | 27 | 38 |
| 2015 | 25 | 32 |
| 2016 | 30 | 47 |
| 2017 | 37 | 47 |
| 2018 | 34 | 49 |
| 2019 | 48 | 30 |
| 2020 | 23 | 25 |
| 2021 | 24 | 23 |
| 2022 | 11 | 19 |
| 2023 | 16 | 22 |
| 2024 | 19 | 22 |
| 2025 | 15 | 22 |
| 2026 | 5 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Single cell selection and isolation21 Jul 2026US 12,687,495 B2Erasmus University Medical Center Rotterdam
- Photoactive fluorescent compounds and use thereof for labeling of proteins14 Jul 2026US 12,681,018 B2Eikon Therapeutics, Inc.
- Compound, photosensitive resin composition comprising same, photosensitive resin film, color filter and CMOS image sensor7 Jul 2026US 12,674,058 B2Samsung SDI.Co., Ltd.
- Fluorescent dye molecules for tracer applications in subterranean formations19 May 2026US 12,631,612 B2Saudi Arabian Oil Company
- Deuterated fluorophores17 Feb 2026US 12,552,938 B2Howard Hughes Medical Institute
- 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
- Sulfonate-Containing Water-Solubilizing Peptides11 Jun 2026US 2026/0160758 A1
- Additive composition for lubricants and method of use thereof9 Apr 2026US 2026/0098226 A1SYENSQO SPECIALTY POLYMERS ITALY S.p.A.
- Dyes with pH-dependent absorption and fluorescence19 Mar 2026US 2026/0078258 A1ATTO-TEC GmbH
Most cited
By later US patents
- Energy transfer dyes with enchanced fluorescence280US 5,800,996 AThe Perkin-Elmer Corporation · 1998
- 4, 7-Dichlororhodamine dyes239US 5,847,162 AThe Perkin-Elmer Corporation · 1998
- Spectrally resolvable rhodamine dyes for nucleic acid sequence determination238US 5,366,860 AApplied Biosystems, LLC · 1994
- Energy transfer dyes with enhanced fluorescence209US 5,945,526 AThe Perkin-Elmer Corporation · 1999
- Sulfonated xanthene derivatives204US 6,130,101 AMolecular Probes, Inc. · 2000