C01B 25/40
Polyphosphates
C01B25/40 (Polyphosphates) appears on 143 US grants and 43 published applications in this corpus.
Search patents in C01B- Granted patents
- 143
- Published applications
- 43
- Assignees
- 81
- Inventors
- 283
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 12 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 7 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 10 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 3 |
| 2011 | 2 | 1 |
| 2012 | 0 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 3 | 2 |
| 2016 | 2 | 9 |
| 2017 | 2 | 4 |
| 2018 | 1 | 4 |
| 2019 | 7 | 1 |
| 2020 | 0 | 1 |
| 2021 | 2 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 2 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods for the continuous polymerization of phosphate compounds to form polyphosphate compositions14 Oct 2025US 12,441,848 B2J. M. Huber Corporation
- Methods for the continuous polymerization of phosphate compounds to form polyphosphate compositions26 Mar 2024US 11,939,430 B2J. M. Huber Corporation
- Mixtures of ammonium polyphosphate and at least one soluble ionic compound containing sulfate and/or is capable of releasing sulfate ions18 Apr 2023US 11,628,589 B2Clariant International Ltd.
- Assay for quantifying polyphosphates6 Dec 2022US 11,519,917 B2The Board of Trustees of the University of Illinois
- Renewable magnesium removing agent and its use in preparation of low-magnesium lithium-rich brine23 Nov 2021US 11,180,369 B2Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
- Zinc polyphosphate and method for producing same6 Aug 2026US 2026/0225890 A1Kamui Pharma, Inc.
- Polyphosphate materials28 Nov 2024US 2024/0391775 A1
- Methods for the continuous polymerization of phosphate compounds to form polyphosphate compositions13 Jun 2024US 2024/0191039 A1J. M. Huber Corporation
- Heat stabilizer for polymer processing using phosphate with suppressed crystallinity, and method for preparing the same14 Dec 2023US 2023/0399489 A1Industry-Academic Cooperation Foundation, Yeungnam University
- Positive electrode material, preparation method therefor and use thereof7 Dec 2023US 2023/0395775 A1Hengdian Group Dmegc Magnetics Co., Ltd
Most cited
By later US patents
- Crystallization of poly ammonium phosphate in particular organic material and uses thereof44US 9,249,021 B22016
- Poly(arylether-sulfone) semipermeable membrane comprising substituted halomethyl and/or quaternary nitrogen groups42US 4,029,582 ADaicel Corporation · 1977
- Production of aluminum polyphosphate24US 4,147,758 AHoechst Aktiengesellschaft · 1979
- Surface treated silica22US 4,029,513 APhiladephia Quartz Company · 1977
- Removal of fluorine from phosphatic solutions20US 4,053,561 AStauffer Chemical Company · 1977