C22B 3/38
Containing phosphorus
Official title: containing phosphorus
C22B3/38 (Containing phosphorus) appears on 354 US grants and 238 published applications in this corpus.
Search patents in C22B- Granted patents
- 354
- Published applications
- 238
- Assignees
- 270
- Inventors
- 966
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 11 | 0 |
| 1978 | 7 | 0 |
| 1979 | 6 | 0 |
| 1980 | 13 | 0 |
| 1981 | 10 | 0 |
| 1982 | 10 | 0 |
| 1983 | 17 | 0 |
| 1984 | 11 | 0 |
| 1985 | 12 | 0 |
| 1986 | 15 | 0 |
| 1987 | 9 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 8 | 0 |
| 1991 | 9 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 10 | 0 |
| 2000 | 2 | 0 |
| 2001 | 8 | 2 |
| 2002 | 3 | 2 |
| 2003 | 1 | 3 |
| 2004 | 4 | 7 |
| 2005 | 0 | 2 |
| 2006 | 1 | 4 |
| 2007 | 2 | 3 |
| 2008 | 1 | 3 |
| 2009 | 2 | 0 |
| 2010 | 8 | 7 |
| 2011 | 0 | 7 |
| 2012 | 4 | 3 |
| 2013 | 3 | 5 |
| 2014 | 5 | 1 |
| 2015 | 4 | 4 |
| 2016 | 3 | 3 |
| 2017 | 2 | 5 |
| 2018 | 7 | 4 |
| 2019 | 4 | 11 |
| 2020 | 3 | 8 |
| 2021 | 5 | 15 |
| 2022 | 6 | 15 |
| 2023 | 9 | 38 |
| 2024 | 19 | 27 |
| 2025 | 21 | 35 |
| 2026 | 15 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C22B 3/384Pentavalent phosphorus oxyacids, esters thereof250
- C22B 3/382Phosphine chalcogenides39
- C22B 3/385Thiophosphoric acids, or esters thereof35
- C22B 3/386Polyphosphoric oxyacids, or derivatives thereof32
- C22B 3/387Cyclic or polycyclic compounds23
- C22B 3/381Phosphines20
- C22B 3/383Tervalent phosphorus oxyacids, esters thereof15
Recent patents
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Most cited
By later US patents
- Extraction of metals using supercritical fluid and chelate forming legand71US 5,730,874 AIdaho Research Foundation, Inc. · 1998
- Aqueous solutions for obtaining metals by reductive deposition60US 6,183,545 B2Daiwa Fine Chemicals Co., Ltd. · 2001
- Recovery of gold from aqueous solutions51US 4,913,730 ACanadian Patents and Development Limited · 1990
- Method for separating metal constituents from ocean floor nodules46US 4,042,664 ADeepsea Ventures, Inc. · 1977
- Method for extracting lanthanides and actinides from acid solutions45US 4,548,790 AThe United States of America as represented by the United States Department of Energy · 1985