C01B 25/00
Phosphorus
Official title: Phosphorus; Compounds thereof ({C01B6/00} , C01B21/00, C01B23/00 take precedence; perphosphates C01B15/16)
C01B25/00 (Phosphorus) appears on 3,088 US grants and 3,143 published applications in this corpus.
Search patents in C01B- Granted patents
- 3,088
- Published applications
- 3,143
- Assignees
- 1,591
- Inventors
- 7,711
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 74 | 0 |
| 1977 | 70 | 0 |
| 1978 | 56 | 0 |
| 1979 | 56 | 0 |
| 1980 | 67 | 0 |
| 1981 | 92 | 0 |
| 1982 | 75 | 0 |
| 1983 | 80 | 0 |
| 1984 | 57 | 0 |
| 1985 | 62 | 0 |
| 1986 | 44 | 0 |
| 1987 | 68 | 0 |
| 1988 | 54 | 0 |
| 1989 | 56 | 0 |
| 1990 | 36 | 0 |
| 1991 | 44 | 0 |
| 1992 | 38 | 0 |
| 1993 | 30 | 0 |
| 1994 | 30 | 0 |
| 1995 | 28 | 0 |
| 1996 | 33 | 0 |
| 1997 | 22 | 0 |
| 1998 | 16 | 0 |
| 1999 | 26 | 0 |
| 2000 | 27 | 0 |
| 2001 | 28 | 6 |
| 2002 | 25 | 33 |
| 2003 | 26 | 36 |
| 2004 | 22 | 43 |
| 2005 | 23 | 47 |
| 2006 | 23 | 45 |
| 2007 | 25 | 46 |
| 2008 | 27 | 47 |
| 2009 | 25 | 65 |
| 2010 | 37 | 114 |
| 2011 | 40 | 110 |
| 2012 | 64 | 132 |
| 2013 | 71 | 111 |
| 2014 | 81 | 131 |
| 2015 | 108 | 152 |
| 2016 | 89 | 134 |
| 2017 | 124 | 133 |
| 2018 | 109 | 134 |
| 2019 | 136 | 133 |
| 2020 | 102 | 157 |
| 2021 | 97 | 173 |
| 2022 | 92 | 172 |
| 2023 | 116 | 225 |
| 2024 | 127 | 278 |
| 2025 | 132 | 276 |
| 2026 | 98 | 210 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01B 25/16Oxyacids of phosphorus2,447
- C01B 25/08Phosphorus: other phosphides175
- C01B 25/14Sulfur, selenium, or tellurium compounds of phosphorus152
- C01B 25/02Preparation of phosphorus125
- C01B 25/003Phosphorus76
- C01B 25/01Treating phosphate ores or other raw phosphate materials to obtain phosphorus or74
- C01B 25/10Halides or oxyhalides of phosphorus64
- C01B 25/06Hydrogen phosphides61
All 10 subgroupsShow fewer
Recent patents
- Method for preparing lithium manganese iron phosphate, cathode material, and lithium-ion battery6 Oct 2026US 12,753,077 B2Phylion Battery Co., Ltd.
- Preparation method for iron phosphate powder by microporous filtration and concentration and preparation device thereof6 Oct 2026US 12,753,078 B2Zhejiang Dong'ou Filtering Machinery Manufacturing Co., Ltd.
- Rechargeable lithium battery with an improved ε-VOPO4 cathode, and applications thereof6 Oct 2026US 12,755,970 B2The Research Foundation for The State University of New York
- Heterogeneous catalyst for transesterification and method of preparing same6 Oct 2026US RE51,051 E1Crystaphase Products, Inc.
- Circular carbon process29 Sep 2026US 12,747,159 B2BASF SE
- Lithium iron phosphate precursor, lithium iron phosphate cathode material with high compaction density, and manufacturing method thereof8 Oct 2026US 2026/0307993 A1Advanced Lithium Electrochemistry Co., Ltd.
- Melt process for preparing alkali metal phosphate cathode materials from variable composition sources8 Oct 2026US 2026/0307994 A1Ignis Lithium Inc.
- Manufacturing method for lithium phosphate1 Oct 2026US 2026/0296888 A1Posco Holdings Inc.
- Methods for Preparing Ferromanganese Oxide, Lithium Manganese Iron Phosphate Material, and Cathode Plate1 Oct 2026US 2026/0296889 A1Hubei Hongrun High-Tech New Materials Co., Ltd.
- Process for producing phosphate products and sulfate products1 Oct 2026US 2026/0296906 A1Susphos B.V.
Most cited
By later US patents
- Cathode materials for secondary (rechargeable) lithium batteries408US 5,910,382 ABoard of Regents, The University of Texas Systems · 1999
- Preparation of III-V semiconductor nanocrystals369US 5,505,928 AThe Regents of the University of California · 1996
- Bioresorbable ceramic composites294US 6,027,742 AEtex Corporation · 2000
- Bioresorbable ceramic composites284US 6,331,312 B1Etex Corporation · 2001
- Nanocrystalline apatites and composites, prostheses incorporating them, and method for their production242US 6,013,591 AMassachusetts Institute of Technology · 2000