B01J 38/74
Utilising ion-exchange
Official title: utilising ion-exchange
B01J38/74 (Utilising ion-exchange) appears on 37 US grants and 21 published applications in this corpus.
Search patents in B01J- Granted patents
- 37
- Published applications
- 21
- Assignees
- 25
- Inventors
- 76
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 17 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 0 |
| 2004 | 0 | 3 |
| 2005 | 2 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 2 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 3 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 2 | 2 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Processes for making ethylene glycol and/or propylene glycol from aldose- and/or ketose-yielding carbohydrates with integrated tungsten catalyst recovery13 May 2025US 12,297,166 B2T. EN Process Technology, Inc.
- Hydrogenated nitrile rubber with reduced catalyst impurity7 May 2024US 11,976,181 B2Zeon Chemicals L.P.
- Processes for making ethylene glycol and/or propylene glycol from aldose- and/or ketose-yielding carbohydrates with integrated tungsten catalyst recovery16 Apr 2024US 11,958,794 B2T. EN Process Technology, Inc.
- Catalyst recycle methods6 Jun 2023US 11,667,617 B2Novomer, Inc.
- Catalyst recycle methods8 Dec 2020US 10,858,329 B2Novomer, Inc.
- Processes for making ethylene glycol and/or propylene glycol from aldose- and/or ketose-yielding carbohydrates with integrated tungsten catalyst recovery8 Aug 2024US 2024/0262769 A1T. EN Process Technology, Inc.
- Hydrogenated nitrile rubber with reduced catalyst impurity11 Jul 2024US 2024/0228757 A1Zeon Chemicals L.P.
- Processes for making ethylene glycol and/or propylene glycol from aldose- and/or ketose-yielding carbohydrates with integrated tungsten catalyst recovery20 Jul 2023US 2023/0227386 A1T. EN Process Technology, Inc.
- Hydrogenated nitrile rubber with reduced catalyst impurity14 Jul 2022US 2022/0220289 A1Zeon Chemicals L.P.
- Catalyst Recycle Methods22 Oct 2020US 2020/0331877 A1Novomer, Inc.
Most cited
By later US patents
- Process for improving productivity of a carbonylation catalyst solution by removing corrosion metals77US 5,731,252 AHoechst Celanese Corporation · 1998
- Recovery process for oxidation catalyst in the manufacture of aromatic carboxylic acids53US 5,955,394 AMobile Process Technology, Co. · 1999
- Process for manufacture of bisphenol31US 5,783,733 AGeneral Electric Company · 1998
- Metal-ligand complex catalyzed processes27US 5,731,472 AUnion Carbide Chemicals & Plastics Technology Corporation · 1998
- Hydroformaylation processes25US 5,741,944 AUnion Carbide Chemicals & Plastics Technology Corporation · 1998