C01B 15/0135
Purification by solid ion-exchangers or solid chelating agents
Official title: {Purification by solid ion-exchangers or solid chelating agents}
C01B15/0135 (Purification by solid ion-exchangers or solid chelating agents) appears on 41 US grants and 26 published applications in this corpus.
Search patents in C01B- Granted patents
- 41
- Published applications
- 26
- Assignees
- 24
- Inventors
- 93
- Latest grant
- 25 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 0 | 4 |
| 2003 | 4 | 5 |
| 2004 | 1 | 1 |
| 2005 | 4 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 2 |
| 2022 | 1 | 0 |
| 2023 | 0 | 2 |
| 2024 | 0 | 0 |
| 2025 | 1 | 3 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for purifying hydrogen peroxide25 Mar 2025US 12,258,268 B2Oci Company Ltd.
- Aqueous hydrogen peroxide purification method and purification system13 Dec 2022US 11,524,896 B2Kurita Water Industries Ltd.
- Methods and systems for purifying hydrogen peroxide solutions8 Sep 2020US 10,766,771 B2RASIRC, Inc.
- Method for producing of ultra-clean and high-purity aqueous hydrogen peroxide solution6 May 2014US 8,715,613 B2Shanghai Chemical Reagent Research Institute
- Process for the purification of aqueous peroxygen solutions, solutions obtainable thereby and their use6 Jan 2009US 7,473,412 B2Solvay (Societe Anonyme)
- Regenerating method of electrodeionization system and method for purifying hydrogen peroxide by using same23 Jul 2026US 2026/0208116 A1
- Method for purifying hydrogen peroxide23 Jul 2026US 2026/0209040 A1
- Process for the Purification of Hydrogen Peroxide25 Dec 2025US 2025/0388466 A1Solvay SA
- Purification method and system for aqueous hydrogen peroxide solution6 Feb 2025US 2025/0042737 A1Dongwoo Fine-Chem Co., Ltd.
- Purification method and apparatus for aqueous hydrogen peroxide solution6 Feb 2025US 2025/0042738 A1Dongwoo Fine-Chem Co., Ltd.
Most cited
By later US patents
- Method for purifying impure aqueous hydrogen peroxide solution24US 4,999,179 AMitsubishi Gas Chemical Company, Inc. · 1991
- Process for producing a purified aqueous hydrogen peroxide solution18US 5,733,521 AMitsubishi Gas Chemical Company, Inc. · 1998
- Purification of hydrogen peroxide16US 5,397,475 AInterox Chemicals Limited · 1995
- Process for the preparation of an ultra pure hydrogen peroxide solution by ionic exchange in beds having defined H/D ratios15US 5,932,187 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1999
- Process for preparing high purity hydrogen peroxide14US 5,055,286 ATokai Denka Kogyo Kabushiki Kaisha · 1991