C01B 25/168
Pyrophosphorous acid
Official title: Pyrophosphorous acid; Salts thereof
C01B25/168 (Pyrophosphorous acid) appears on 7 US grants and 7 published applications in this corpus.
Search patents in C01B- Granted patents
- 7
- Published applications
- 7
- Assignees
- 10
- Inventors
- 26
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
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| 2005 | 0 | 0 |
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| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cathode active material, cathode and lithium secondary battery comprising same, and preparation method therefor29 Sep 2026US 12,749,680 B2Samsung Electronics Co., Ltd.
- Near-infrared absorbing white material and preparation method thereof23 Feb 2021US 10,926,354 B2Buseong Polycom Co., Ltd.
- Pyrophosphate type material, process for preparing such a material and use for bone repair13 Aug 2019US 10,376,612 B2Centre National De La Recherche Scientifique
- Salts of pyrophosphonic acid as flame retardants31 Jul 2018US 10,035,896 B2LANXESS Solutions US Inc.
- Process for preparing monobasic pyrophosphate materials7 Jan 2014US 8,623,310 B2Innophos, Inc.
- Synthesis of nanostructured zirconium phosphate27 Nov 2025US 2025/0361145 A1Evonik Operations GmbH
- Cathode active material, cathode and lithium secondary battery comprising same, and preparation method therefor4 Jan 2024US 2024/0006605 A1Samsung Electronics Co., Ltd.
- Near-infrared absorbing white material and preparation method thereof25 Apr 2019US 2019/0118294 A1Buseong Polycom Co., Ltd.
- Pyrophosphate type material, process for preparing such a material and use for bone repair26 Oct 2017US 2017/0304493 A1Centre National De La Recherche Scientifique
- Salts of pyrophosphonic acid as flame retardants4 Feb 2016US 2016/0032076 A1Chemtura Corporation
Most cited
By later US patents