C01C 3/0295
Purification
Official title: {Purification}
C01C3/0295 (Purification) appears on 6 US grants and 7 published applications in this corpus.
Search patents in C01C- Granted patents
- 6
- Published applications
- 7
- Assignees
- 5
- Inventors
- 30
- Latest grant
- 26 Mar 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 0 |
| 2020 | 2 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for the purification of hydrogen cyanide26 Mar 2024US 11,939,281 B2Evonik Operations GmbH
- High purity HCN from acrylonitrile co-production12 May 2020US 10,647,663 B2Invista North America S A R L
- Method for removing nitriles from hydrogen cyanide18 Feb 2020US 10,562,782 B2The Chemours Company Fc, LLC
- Method for purifying hydrocyanic acid9 Dec 2008US 7,462,263 B2
- Method for removing ammonia from a gas comprising hydrogen cyanide, ammonia and water29 Mar 2005US 6,872,296 B2Invista North America S A R L
- Process for the purification of hydrogen cyanide2 Sep 2021US 2021/0269396 A1Evonik Operations GmbH
- High purity hcn from acrylonitrile co-production26 Jul 2018US 2018/0208548 A1Invista North America S A R L
- Method for removing nitriles from hydrogen cyanide12 Jul 2018US 2018/0194640 A1The Chemours Company Fc, LLC
- Hydrogen cyanide manufacturing process with second waste heat boiler16 Jun 2016US 2016/0167975 A1
- Process for heat recovery from ammonia stripper in andrussow process10 Mar 2016US 2016/0068404 A1Invista North America S A R L
Most cited
By later US patents
- Method for removing ammonia from a gas comprising hydrogen cyanide, ammonia and water9US 6,872,296 B2Invista North America S A R L · 2005
- Method for purifying hydrocyanic acid9US 7,462,263 B22008
- Method for the adsorptive extraction of hydrocarbons from aqueous solutions of hydrocyanic acid1US 6,123,852 ASKW Trostberg Aktiengesellschaft · 2000