C22B 3/3846
Phosphoric acid
Official title: {Phosphoric acid, e.g. (O)P(OH)3}
C22B3/3846 (Phosphoric acid) appears on 155 US grants and 136 published applications in this corpus.
Search patents in C22B- Granted patents
- 155
- Published applications
- 136
- Assignees
- 159
- Inventors
- 508
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 9 | 0 |
| 1978 | 5 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 8 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 2 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 4 |
| 2011 | 0 | 2 |
| 2012 | 2 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 2 | 5 |
| 2020 | 2 | 5 |
| 2021 | 3 | 9 |
| 2022 | 2 | 12 |
| 2023 | 6 | 26 |
| 2024 | 9 | 19 |
| 2025 | 18 | 25 |
| 2026 | 9 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gas-Assisted Microflow Extraction (GAME) system patent6 Oct 2026US 12,753,463 B2Phinix, LLC
- Production method for cobalt sulfate26 May 2026US 12,637,361 B2Sumitomo Metal Mining Co., Ltd.
- Hydrometallurgical recovery method for nickel sulfate26 May 2026US 12,637,736 B2Ecopro Materials Co., Ltd.
- Solvent extraction method using two-stage extraction for separation and recovery of nickel, cobalt, and manganese28 Apr 2026US 12,612,678 B2Ecopro Materials Co., Ltd.
- Method for recycling nickel, cobalt and manganese from feed liquid containing nickel, cobalt and manganese28 Apr 2026US 12,612,681 B2Suzhou Botree Cycling Sci & Tech Co., Ltd
- Short-flow nickel-cobalt-manganese co-extraction process for laterite nickel ore hydrometallurgy20 Aug 2026US 2026/0242894 A1Gem Co., Ltd.
- Process for producing high purity aluminium materials13 Aug 2026US 2026/0234015 A1HiPurA Pty Ltd
- Method for removing the actinium contained in a rare earth solution with an organophosphorus solvent and rare earth compositions obtained by this method30 Jul 2026US 2026/0218335 A1Carester
- Method of extracting metal ions16 Jul 2026US 2026/0201497 A1FUJIFILM Corporation
- Method for the optimisation of feed for downstream processing16 Jul 2026US 2026/0201502 A1iGo, Inc.
Most cited
By later US patents
- Extraction of metals using supercritical fluid and chelate forming legand71US 5,730,874 AIdaho Research Foundation, Inc. · 1998
- 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 of recovering metal from metalliferous waste37US 3,966,569 AMX Processor Reinhardt & Co. AB · 1976
- Metal sulphide extraction36US 4,378,275 ASaudi-Sudanese Red Sea Joint Commission · 1983