C01B 21/0935
Imidodisulfonic acid
Official title: {Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof}
C01B21/0935 (Imidodisulfonic acid) appears on 30 US grants and 52 published applications in this corpus.
Search patents in C01B- Granted patents
- 30
- Published applications
- 52
- Assignees
- 24
- Inventors
- 100
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 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 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 2 | 2 |
| 2016 | 0 | 2 |
| 2017 | 2 | 1 |
| 2018 | 3 | 1 |
| 2019 | 0 | 3 |
| 2020 | 1 | 2 |
| 2021 | 2 | 4 |
| 2022 | 0 | 5 |
| 2023 | 2 | 4 |
| 2024 | 2 | 9 |
| 2025 | 2 | 6 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for recovering raw and auxiliary materials in the production of lithium bis(fluorosulfonyl)imide9 Jun 2026US 12,649,659 B2Catl-Sicong Novel Materials Co., Ltd
- Method for drying and purifying LiFSI19 May 2026US 12,630,425 B2Arkema France
- Bis(fluorosulfonyl)imide impurity removal and purification system and bis(fluorosulfonyl)imide impurity removal and purification method25 Nov 2025US 12,479,725 B2Morimatsu (Jiangsu) Heavy Industry Co., Ltd.
- Process for preparing bis(fluorosulfonyl) imide2 Sep 2025US 12,404,175 B2Arkema France
- Method for recovering lithium bis(fluorosulfonyl)imide8 Oct 2024US 12,110,227 B2Catl-Sicong Novel Materials Co., Ltd
- Method of removing one or more target impurities from crude fluorosulfonylimide compound3 Sep 2026US 2026/0257916 A1Specialty Operations France
- Process for purifying bis(fluoro sulfonyl)imide salts23 Jul 2026US 2026/0209041 A1Specialty Operations France
- Water removal and recovery system and method for lithium bis(fluorosulfonyl)imide23 Apr 2026US 2026/0108825 A1Morimatsu (Jiangsu) Heavy Industry Co., Ltd.
- Method for manufacturing bis(halogeno sulfonyl)imide9 Apr 2026US 2026/0097960 A1Specialty Operations France
- Method for preparing lithium bis(fluorosulfonyl)imide26 Mar 2026US 2026/0084964 A1Lanzhou Chemspec New Energy Technology Corporation
Most cited
By later US patents
- Ionic conducting material having good anticorrosive properties35US 5,916,475 ACentre National De La Recherche Scientifique · 1999
- Synthesis of bis(fluorosulfonyl)imide15US 8,377,406 B1Boulder Ionics Corporation · 2013
- Synthesis of hydrogen bis(fluorosulfonyl)imide15US 8,722,005 B1Boulder Ionics Corporation · 2014
- Ionic conducting material having good anticorrosive properties14US 6,254,797 B1Centre National De La Recherche Scientifique · 2001
- Ionic conducting material having good anticorrosive properties13US 6,682,855 B2Centre National De La Recherche Scientifique · 2004