C07F 9/3895
Pyrophosphonic acids
Official title: {Pyrophosphonic acids; phosphonic acid anhydrides}
C07F9/3895 (Pyrophosphonic acids) appears on 37 US grants and 24 published applications in this corpus.
Search patents in C07F- Granted patents
- 37
- Published applications
- 24
- Assignees
- 24
- Inventors
- 80
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 3 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 2 | 1 |
| 2010 | 1 | 1 |
| 2011 | 2 | 5 |
| 2012 | 2 | 0 |
| 2013 | 0 | 1 |
| 2014 | 3 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 4 |
| 2020 | 0 | 0 |
| 2021 | 4 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Extended- and multimodal-release compositions25 Aug 2026US 12,715,801 B2Finoric, LLC
- Preparation method of glufosinate or derivatives thereof27 May 2025US 12,312,372 B2Lier Chemical Co., Ltd.
- Oral care compositions comprising phosphono-phosphate and anionic group containing polymers28 Jun 2022US 11,370,863 B2The Procter & Gamble Company
- Oral care compositions comprising phosphono-phosphate and anionic group containing polymers14 Dec 2021US 11,198,763 B2The Procter & Gamble Company
- Phosphono-phosphate containing compounds and polymers29 Jun 2021US 11,046,798 B2The Procter & Gamble Company
- Functional material, passivation film, solar cell, photovoltaic module, and photovoltaic system27 Nov 2025US 2025/0366298 A1Contemporary Amperex Technology Co., Limited
- Extended- and Multimodal-Release Compositions1 May 2025US 2025/0136488 A1Finoric, LLC
- Preparation method of glufosinate or derivatives thereof4 Jul 2024US 2024/0217996 A1Lier Chemical Co., Ltd.
- Method of preparing phosphorus-containing flame retardants and their use in polymer compositions11 Apr 2024US 2024/0117252 A1LANXESS Corporation
- Oral care compositions comprising phosphono-phosphate and anionic group containing polymers18 Feb 2021US 2021/0047475 A1The Procter & Gamble Company
Most cited
By later US patents
- Method for the production of cyclic phosphonic acid anhydrides20US 7,473,794 B2Archimica GmbH · 2009
- Method for the production of cyclic phosphonic acid anhydrides17US 7,829,736 B2Archimica GmbH · 2010
- Process for the preparation of carboxylic acid amides and peptides16US 4,331,592 AHoechst Aktiengesellschaft · 1982
- Process for the manufacture of phosphinic and phosphonic acid anhydrides11US 4,267,125 AHoechst Aktiengesellschaft · 1981
- Process for the manufacture of vinyl phosphonic acid derivatives11US 4,388,252 AHoechst Aktiengesellschaft · 1983