C01B 7/198
By solid ion-exchangers
Official title: {by solid ion-exchangers}
C01B7/198 (By solid ion-exchangers) appears on 19 US grants and 10 published applications in this corpus.
Search patents in C01B- Granted patents
- 19
- Published applications
- 10
- Assignees
- 11
- Inventors
- 41
- Latest grant
- 14 Dec 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 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 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 3 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 3 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for producing diluted hydrofluoric acid14 Dec 2021US 11,198,609 B2Condias GmbH
- Process to recover hydrogen fluoride from hydrogen fluoride-polymer compositions7 May 2019US 10,280,082 B2Honeywell International Inc.
- Azeotrope-like composition of hexafluoropropane, hexafluoropropene and hydrogen fluoride18 Feb 2014US 8,653,311 B2Honeywell International Inc.
- Azeotrope-like composition of hexafluoropropane, hexafluoropropene and hydrogen fluoride7 May 2013US 8,436,218 B2Honeywell International Inc.
- Hydrofluoric acid wastewater treatment method and device25 Dec 2007US 7,311,799 B2Sasakura Engineering Co., Ltd.
- Method for producing diluted hydrofluoric acid31 May 2018US 2018/0148332 A1Condias GmbH
- Aqueous hydrogen fluoride compositions5 Apr 2018US 2018/0093890 A1Honeywell International Inc.
- Process to recover hydrogen fluoride from hydrogen fluoride-polymer compositions5 Apr 2018US 2018/0093891 A1Honeywell International Inc.
- Azeotrope-Like Composition of Hexafluoropropane, Hexafluoropropene and Hydrogen Fluoride22 Aug 2013US 2013/0217929 A1Honeywell International Inc.
- Azeotrope-Like Composition of Hexafluoropropane, Hexafluoropropene and Hydrogen Fluoride1 Dec 2011US 2011/0295045 A1Honeywell International Inc.
Most cited
By later US patents
- Method and apparatus for purifying hydrogen fluoride62US 4,952,386 AAthens Corporation · 1990
- Point-of-use ammonia purification for electronic component manufacture28US 5,496,778 AStartec Ventures, Inc. · 1996
- On-site generation of ultra-high-purity buffered-HF for semiconductor processing28US 5,722,442 AStartec Ventures, Inc. · 1998
- Purification of hydrofluoric acid etching solutions with weak anion exchange resins21US 4,125,594 ACorning Glass Works · 1978
- On-site manufacture of ultra-high-purity hydrofluoric acid for semiconductor processing18US 5,785,820 AStartec Ventures, Inc. · 1998