C07F 9/48
Phosphonous acids [rp2] including [rhp]
Official title: Phosphonous acids [RP(OH)2] {including [RHP(=O)(OH)]}; Thiophosphonous acids {including [RP(SH)2], [RHP(=S)(SH)]; Derivatives thereof}
C07F9/48 (Phosphonous acids [rp2] including [rhp]) appears on 289 US grants and 157 published applications in this corpus.
Search patents in C07F- Granted patents
- 289
- Published applications
- 157
- Assignees
- 123
- Inventors
- 532
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 15 | 0 |
| 1985 | 10 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 9 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 0 |
| 2002 | 8 | 5 |
| 2003 | 8 | 5 |
| 2004 | 8 | 13 |
| 2005 | 6 | 11 |
| 2006 | 10 | 4 |
| 2007 | 5 | 4 |
| 2008 | 4 | 7 |
| 2009 | 6 | 4 |
| 2010 | 5 | 7 |
| 2011 | 5 | 16 |
| 2012 | 3 | 7 |
| 2013 | 3 | 9 |
| 2014 | 11 | 7 |
| 2015 | 16 | 9 |
| 2016 | 4 | 10 |
| 2017 | 8 | 8 |
| 2018 | 7 | 8 |
| 2019 | 6 | 7 |
| 2020 | 4 | 1 |
| 2021 | 3 | 5 |
| 2022 | 2 | 3 |
| 2023 | 3 | 5 |
| 2024 | 2 | 1 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for continuously producing diethyl methylphosphonite30 Dec 2025US 12,509,478 B2Tsinghua University
- Ligands for production of 1-octene in chromium assisted ethylene oligomerization process14 Oct 2025US 12,440,830 B2Sabic Global Technologies B.V.
- Method for producing phosphorus chemicals from wet process phosphate28 May 2024US 11,993,623 B2Massachusetts Institute of Technology
- Method for preparing glufosinate or analogue thereof19 Mar 2024US 11,932,662 B2Lier Chemical Co., Ltd.
- Preparation method for glufosinate20 Jun 2023US 11,680,077 B2Guangan Lier Chemical Co., Ltd
- Metal extractant, separation recovery method of metal ions using metal extractant, and compound15 Jan 2026US 2026/0015371 A1FUJIFILM Corporation
- Bis-aminophosphines as catalysts for the dimerization of alkyl acrylates5 Dec 2024US 2024/0400593 A1Specialty Operations France
- Method for Preparing L-Glufosinate14 Dec 2023US 2023/0399348 A1Guangan Lier Chemical Co., Ltd
- Preparation method for glufosinate31 Aug 2023US 2023/0271985 A1Guangan Lier Chemical Co., Ltd
- Method for Preparing Glufosinate or Analogue Thereof24 Aug 2023US 2023/0265115 A1Lier Chemical Co., Ltd.
Most cited
By later US patents
- Ligands for metals and improved metal-catalyzed processes based thereon143US 6,307,087 B1Massachusetts Institute of Technology · 2001
- Acylphosphine oxide compounds their preparation and use115US 4,298,738 ABASF SE · 1981
- Acylphosphine oxide compounds113US 4,324,744 ABASF SE · 1982
- Phosphinylalkanoyl prolines104US 4,168,267 AE. R. Squibb & Sons, Inc. · 1979
- Ligands for metals and improved metal-catalyzed processes based thereon100US 6,395,916 B1Massachusetts Institute of Technology · 2002