C01B 25/165
Hypophosphorous acid
Official title: Hypophosphorous acid; Salts thereof
C01B25/165 (Hypophosphorous acid) appears on 30 US grants and 18 published applications in this corpus.
Search patents in C01B- Granted patents
- 30
- Published applications
- 18
- Assignees
- 21
- Inventors
- 69
- Latest grant
- 29 May 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 2 | 2 |
| 2015 | 2 | 3 |
| 2016 | 2 | 3 |
| 2017 | 3 | 1 |
| 2018 | 3 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Abrasive particles having a unique morphology29 May 2018US 9,982,176 B2Diamond Innovations, Inc.
- Process for the production of hypophosphite salts22 May 2018US 9,976,010 B2Rhodia Operations
- Polyolefin-based flame retardant resin composition and molded product2 Jan 2018US 9,856,420 B2LG Chem.Ltd.
- Abrasive particles having a unique morphology19 Dec 2017US 9,845,417 B2Diamond Innovations, Inc.
- Low-corrosion fire-resistant thermoplastic resin composition21 Nov 2017US 9,822,239 B2Shanghai Huihai Chemical Technology Co., Ltd.
- Method for producing a compound and apparatus for producing a compound27 Aug 2026US 2026/0250131 A1Helander Holding Oy
- Organic compound, perovskite precursor solution, perovskite film, perovskite cell, and electric apparatus18 Dec 2025US 2025/0386725 A1Contemporary Amperex Technology Co., Limited
- Wet-chemically prepared polymeric lithium phosphorus oxyni-tride (lipon), method for the preparation thereof, uses thereof, and battery7 Jul 2022US 2022/0216506 A1Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- Abrasive particles having a unique morphology21 Dec 2017US 2017/0362481 A9Diamond Innovations, Inc.
- Polyolefin-based flame retardant resin composition and molded product20 Oct 2016US 2016/0304785 A1LG Chem.Ltd.
Most cited
By later US patents
- Production of anticorrosive pigments containing phosphorus34US 4,294,808 AHoechst Aktiengesellschaft · 1981
- Process for the production of alkali metal hypophosphites9US 5,225,052 ARinkagaku Kogyo Co., Ltd. · 1993
- Process for producing hypophosphorous acid (H.sub.3 PO.sub.2) and non-transition metal hypophosphites5US 4,265,866 AStauffer Chemical Company · 1981
- Mixtures of aluminum hydrogenphosphites with aluminum salts, process for the production thereof and the use thereof5US 9,505,904 B2Clariant International Ltd. · 2016
- Method for manufacturing salts of metals4US 5,716,512 A1998