C12Q 2326/40
Triphenylmethane dye chromogens
Official title: Triphenylmethane dye chromogens, e.g. fluorescein derivatives
C12Q2326/40 (Triphenylmethane dye chromogens) appears on 9 US grants and 1 published applications in this corpus.
Search patents in C12Q- Granted patents
- 9
- Published applications
- 1
- Assignees
- 7
- Inventors
- 19
- Latest grant
- 7 May 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Chromogen layering for color generation7 May 2019US 10,280,445 B2Diagnostic BioSystems
- Enzyme controlled processes and products1 Mar 1994US 5,290,682 APolaroid Corporation
- Method for detecting hydrogen peroxide employing triaryl- and trihetarylmethane derivatives as redox indicators29 Jan 1991US 4,988,616 ABayer Aktiengesellschaft
- Method and test composition for determination of hydrogen peroxide7 Mar 1989US 4,810,642 AKyowa Medex Co., Ltd.
- Method of quantitatively measuring an oxidative substance using triphenyl methane type leuco-pigment as a coloring substance18 Oct 1988US 4,778,753 AWako Pure Chemical Industries, Ltd.
Most cited
By later US patents
- Method of quantitatively measuring an oxidative substance using triphenyl methane type leuco-pigment as a coloring substance45US 4,778,753 AWako Pure Chemical Industries, Ltd. · 1988
- Assay of peroxidatively active materials30US 4,269,938 AEastman Kodak Company · 1981
- Compositions and elements containing triarylmethane leuco dyes and methods using same17US 4,670,385 AEastman Kodak Company · 1987
- Triphenyl methane derivatives and method of quantitatively measuring an oxidative substance15US 4,673,635 AWako Pure Chemical Industries, Ltd. · 1987
- Triphenyl methane derivatives and method of quantitatively measuring an oxidative substance9US 4,613,465 AWako Pure Chemical Industries, Ltd. · 1986