C23F 11/1676
Phosphonic acids
Official title: {Phosphonic acids}
C23F11/1676 (Phosphonic acids) appears on 147 US grants and 76 published applications in this corpus.
Search patents in C23F- Granted patents
- 147
- Published applications
- 76
- Assignees
- 88
- Inventors
- 292
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 13 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 4 |
| 2004 | 1 | 1 |
| 2005 | 1 | 4 |
| 2006 | 1 | 3 |
| 2007 | 1 | 3 |
| 2008 | 2 | 2 |
| 2009 | 2 | 6 |
| 2010 | 1 | 3 |
| 2011 | 3 | 2 |
| 2012 | 1 | 0 |
| 2013 | 3 | 1 |
| 2014 | 0 | 2 |
| 2015 | 1 | 1 |
| 2016 | 1 | 4 |
| 2017 | 0 | 5 |
| 2018 | 4 | 6 |
| 2019 | 6 | 3 |
| 2020 | 2 | 4 |
| 2021 | 4 | 6 |
| 2022 | 4 | 3 |
| 2023 | 5 | 5 |
| 2024 | 2 | 5 |
| 2025 | 3 | 1 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Coolant with low electrical conductivity4 Aug 2026US 12,698,430 B2BASF SE
- Methods and compositions to reduce azoles and AOX corrosion inhibitors9 Jun 2026US 12,649,675 B2Bl Technologies, Inc.
- Corrosion control compositions and methods of mitigating corrosion24 Mar 2026US 12,584,227 B2Ecolab USA Inc.
- Method for applying a conversion coating with an aquous pickling composition comprising an aminophosphonic acid and a polymer24 Mar 2026US 12,584,229 B2Chemetall GmbH
- Polishing compositions and methods of use thereof26 Aug 2025US 12,398,291 B2Fujifilm Electronic Materials U.S.A., Inc.
- Method for preventing corrosion of metal component1 Oct 2026US 2026/0297757 A1Kurita Water Industries Ltd.
- Composition for protecting copper surface, and method for producing semiconductor intermediate and semiconductor using same26 Jun 2025US 2025/0207265 A1Mitsubishi Gas Chemical Company, Inc.
- Nonferrous metal corrosion inhibitors and methods of using same7 Nov 2024US 2024/0368769 A1Solugen, Inc.
- Novel coolant with low electrical conductivity24 Oct 2024US 2024/0352300 A1BASF SE
- Novel coolant with low electrical conductivity19 Sep 2024US 2024/0309257 A1BASF SE
Most cited
By later US patents
- Method of providing corrosion protection75US 5,853,797 ALucent Technologies Inc. · 1998
- 1-Hydroxy-3-amino-alkane-1,1-diphosphonic acids and salts68US 4,054,598 AHenkel & Cie G.m.b.H. · 1977
- Durability of adhesively bonded aluminum structures and method for inhibiting the conversion of aluminum oxide to aluminum hydroxide50US 4,308,079 AMartin Marietta Corporation · 1981
- Phosphino derivatives46US 6,071,434 AAlbright & Wilson UK Limited · 2000
- Corrosion inhibitors40US 4,052,160 ACiba-Geigy Corporation · 1977