C01B 25/42
Pyrophosphates
C01B25/42 (Pyrophosphates) appears on 64 US grants and 49 published applications in this corpus.
Search patents in C01B- Granted patents
- 64
- Published applications
- 49
- Assignees
- 63
- Inventors
- 197
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 3 |
| 2011 | 0 | 2 |
| 2012 | 1 | 5 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 3 | 5 |
| 2016 | 2 | 4 |
| 2017 | 2 | 2 |
| 2018 | 6 | 3 |
| 2019 | 3 | 3 |
| 2020 | 2 | 3 |
| 2021 | 4 | 2 |
| 2022 | 0 | 0 |
| 2023 | 2 | 2 |
| 2024 | 1 | 4 |
| 2025 | 1 | 7 |
By publication year. Applications have been published since 2001.
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
- Positive electrode material for secondary battery, method for manufacturing the same, and lithium-ion secondary battery6 Jun 2023US 11,670,773 B2Fujitsu Limited
- Positive electrode for lithium ion battery, lithium ion battery and method of producing positive electrode for lithium ion battery30 May 2023US 11,664,490 B2Honda Motor Co., Ltd.
- Anti-scaling composition for water systems28 Sep 2021US 11,130,691 B2Cabot Corporation
- Sodium iron phosphate pyrophosphate positive-electrode material and preparation method thereof, battery, and energy storage device25 Dec 2025US 2025/0391860 A1Xiamen Hithium Energy Storage Technology Co., Ltd.
- Synthesis of nanostructured zirconium phosphate27 Nov 2025US 2025/0361145 A1Evonik Operations GmbH
- Effective calcium phosphate radiative cooling materials20 Nov 2025US 2025/0353747 A1Northeastern University
- Positive electrode active material and preparation method therefor, secondary battery, battery module, battery pack and electric device11 Sep 2025US 2025/0286064 A1Contemporary Amperex Technology (Hong Kong) Limited
- Positive electrode active material and preparation method therefor, secondary battery and electric device28 Aug 2025US 2025/0273674 A1Contemporary Amperex Technology (Honk Kong) Limited
Most cited
By later US patents
- Mesoporous crystalline composition with a high surface area of a tetravalent metal which can be used as catalyst26US 5,993,768 AEniricerche S. p. A. · 1999
- Calcium phosphates13US 4,721,615 AMonsanto Company · 1988
- Method for producing calcium phosphate-based material13US 5,089,195 AAsahi Kogaku Kogyo Kabushiki Kaisha · 1992
- Process for compacting a calcium phosphate composition12US 5,066,441 ARhone-Poulenc Basic Chemicals Co. · 1991
- Electrode materials for magnesium batteries12US 9,077,032 B2Pellon Technologies, Inc. · 2015