C07D 307/885
3,3-diphenylphthalides
Official title: 3,3-Diphenylphthalides
C07D307/885 (3,3-diphenylphthalides) appears on 38 US grants and 9 published applications in this corpus.
Search patents in C07D- Granted patents
- 38
- Published applications
- 9
- Assignees
- 26
- Inventors
- 68
- Latest grant
- 24 Dec 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 2 | 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 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Floor coating compositions and related methods24 Dec 2019US 10,513,633 B2Red Alert Wax, LLC
- Catalytic method for producing phenolphthalein compounds29 Mar 2011US 7,915,430 B2SABIC Innovative Plastics IP B. V.
- Method for producing phenolphthalein using a heteropolyacid catalyst11 Jan 2011US 7,868,190 B2SABIC Innovative Plastics IP B. V.
- Apparatus for three-dimensional optical data storage and retrieval16 Oct 2007US 7,282,320 B2The Trustees of Boston College
- Monomers containing at least one biaryl unit and polymers and derivatives prepared therefrom24 Oct 2006US 7,125,951 B2South Dakota School of Mines and Technology
- Compound, polymerizable composition, hologram recording medium, polymer, optical material, and optical component29 Jan 2026US 2026/0028312 A1Mitsubishi Chemical Corporation
- Fluorescent sensors18 Jan 2024US 2024/0019450 A1The University of Sydney
- Floor coating compositions and related methods22 Mar 2018US 2018/0079932 A1Red Alert Wax, LLC
- Catalytic method for producing phenolphthalein compounds1 Apr 2010US 2010/0081828 A1SABIC Innovative Plastics IP B. V.
- Method for producing phenolphthalein using a heteropolyacid catalyst1 Apr 2010US 2010/0081829 A1SABIC Innovative Plastics IP B. V.
Most cited
By later US patents
- Immobilization of PH-sensitive dyes to solid supports24US 5,384,411 AHewlett-Packard Company · 1995
- Process for preparing phthalide and naphthalide indicator dyes11US 3,931,228 APolaroid Corporation · 1976
- Process for preparing triarylmethane derivatives9US 4,045,458 AKanzaki Paper Manufacturing Co., Ltd. · 1977
- Process for manufacturing crystal violet lactone7US 4,076,728 AAmerican Cyanamid Company · 1978
- Process for preparing benzophenone derivatives7US 4,323,700 AKanzaki Paper Manufacturing Co., Ltd. · 1982