C01B 25/02
Preparation of phosphorus
C01B25/02 (Preparation of phosphorus) appears on 125 US grants and 48 published applications in this corpus.
Search patents in C01B- Granted patents
- 125
- Published applications
- 48
- Assignees
- 69
- Inventors
- 292
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 12 | 0 |
| 1990 | 7 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 5 |
| 2013 | 0 | 1 |
| 2014 | 3 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 0 | 2 |
| 2019 | 3 | 4 |
| 2020 | 4 | 5 |
| 2021 | 5 | 5 |
| 2022 | 0 | 4 |
| 2023 | 5 | 6 |
| 2024 | 2 | 5 |
| 2025 | 2 | 0 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Circular carbon process29 Sep 2026US 12,747,159 B2BASF SE
- Phosphorus production methods and systems and methods for producing a reduction product28 Jul 2026US 12,692,157 B2Novaphos Phosphate Technology LLC
- Method and device for producing phosphorus24 Feb 2026US 12,559,372 B2Tohoku University
- Black phosphorus nanosheet, preparation method therefor, and application thereof6 May 2025US 12,291,449 B2Sinosteel Nanjing Advanced Materials Research Institute Co., Ltd.
- Metal-free few-layer phosphorous nanomaterial: method for its preparation and use thereof4 Feb 2025US 12,214,336 B2Institut National De La Recherche Scientifique
- Method and device for producing phosphorus14 May 2026US 2026/0132027 A1Tohoku University
- Method of preparing black phosphorus crystals26 Feb 2026US 2026/0054985 A1Hubei Xingfa Chemicals Group Co, Ltd
- Metal-free few-layer phosphorous nanomaterial: method for its preparation and use thereof19 Sep 2024US 2024/0307857 A1Institut National De La Recherche Scientifique
- Black Phosphorus Anode Electrodes, Methods For Preparing The Same, And Lithium Ion Batteries11 Jul 2024US 2024/0234704 A1Shenzhen Hanke New Material Technology Co., Ltd.
- Method for removing elemental phosphorus from iron oxide-containing and phosphate-containing substances18 Apr 2024US 2024/0124997 A1Radmat AG
Most cited
By later US patents
- Vertical shaft melting furnace and method of melting65US 4,877,449 AInstitute of Gas Technology · 1989
- Production of chemical compounds29US 9,084,978 B22015
- Processes and equipment for production of elemental phosphorus and thermal phosphoric acid27US 4,919,906 AJames C. Barber and Associates, Inc. · 1990
- Permanent magnet manufacture from very low coercivity crystalline rare earth-transition metal-boron alloy23US 4,921,551 AGeneral Motors Corporation · 1990
- Method of recovering phosphate for reuse as a fertilizer20US 7,588,744 B1Layne Christensen Company · 2009