C01B 25/12
Oxides of phosphorus
C01B25/12 (Oxides of phosphorus) appears on 43 US grants and 30 published applications in this corpus.
Search patents in C01B- Granted patents
- 43
- Published applications
- 30
- Assignees
- 32
- Inventors
- 116
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 2 | 3 |
| 2012 | 1 | 0 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 3 |
| 2018 | 1 | 2 |
| 2019 | 2 | 2 |
| 2020 | 2 | 2 |
| 2021 | 0 | 2 |
| 2022 | 1 | 2 |
| 2023 | 2 | 1 |
| 2024 | 1 | 2 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Phosphorus oxide and phosphoric acid production processes14 Oct 2025US 12,441,616 B2Monsanto Technology LLC
- Total heat energy recovery system for furnace-process phosphoric acid26 Aug 2025US 12,398,039 B2Kunming University of Science and Technology
- Phosphorus production methods and systems and methods for producing a reduction product2 Jan 2024US 11,858,811 B2Novaphos Inc.
- Method for producing lithium difluorophosphate29 Aug 2023US 11,738,998 B2Mitsui Chemicals, Inc.
- Flotation reagents from acidic olive oil2 May 2023US 11,638,923 B1King Saud University
- Phosphorus oxide and phosphoric acid production processes1 Jan 2026US 2026/0001763 A1Monsanto Technology LLC
- Binary substituted vanadium phosphate electrode material1 Aug 2024US 2024/0258519 A1Hindustan Petroleum Corporation Limited
- Phosphorus Production Methods and Systems and Methods for Producing a Reduction Product14 Mar 2024US 2024/0083749 A1Novaphos Phosphate Technology LLC
- Process and device for recovering phosphorus from sewage sludge8 Jun 2023US 2023/0174379 A1Grenzebach Bsh GmbH
- Total Heat Energy Recovery System For Furnace-Process Phosphoric Acid8 Sep 2022US 2022/0281747 A1Kunming University of Science and Technology
Most cited
By later US patents
- Process for making phosphorus pentoxide and optionally phosphoric acid with utilization of the reaction heat15US 4,603,039 AHoechst Aktiengesellschaft · 1986
- Process for reducing phosphate ore14US 4,351,809 AOccidental Research Corporation · 1982
- Conversion of calcium compounds into solid and gaseous compounds13US 4,774,064 AMississippi Chemical Corporation · 1988
- Process for reducing phosphate ore11US 4,389,384 AOccidental Research Corporation · 1983
- Apparatus for the production of hexagonal phosphorus pentoxide10US 4,219,533 AHoechst Aktiengesellschaft · 1980