B01D 2257/408
Cyanides
Official title: Cyanides, e.g. hydrogen cyanide (HCH)
B01D2257/408 (Cyanides) appears on 130 US grants and 171 published applications in this corpus.
Search patents in B01D- Granted patents
- 130
- Published applications
- 171
- Assignees
- 112
- Inventors
- 462
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 8 |
| 2008 | 3 | 4 |
| 2009 | 2 | 3 |
| 2010 | 1 | 16 |
| 2011 | 6 | 9 |
| 2012 | 5 | 9 |
| 2013 | 12 | 10 |
| 2014 | 9 | 12 |
| 2015 | 6 | 6 |
| 2016 | 4 | 8 |
| 2017 | 6 | 5 |
| 2018 | 10 | 18 |
| 2019 | 8 | 14 |
| 2020 | 6 | 10 |
| 2021 | 9 | 12 |
| 2022 | 7 | 5 |
| 2023 | 7 | 3 |
| 2024 | 5 | 4 |
| 2025 | 3 | 8 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Steel mill offgas separation and purification18 Aug 2026US 12,708,874 B2Air Products and Chemicals, Inc.
- Process for removal of acid gases from a fluid stream30 Sep 2025US 12,427,472 B2BASF SE
- Catalytic system and method for the removal of HCN from off-gases of a fluid cracking unit using same, and FCC unit assembly including the catalytic system15 Apr 2025US 12,274,980 B2Umicore AG & Co. KG
- Hydrolysis reaction device for dechlorination and decyanation of blast furnace gas18 Mar 2025US 12,251,660 B2Institute of Process Engineering, Chinese Academy of Sciences
- Zeolite membrane composite, method of producing zeolite membrane composite, and separation method26 Nov 2024US 12,151,216 B2NGK Insulators, Ltd.
- Gas recovery system8 Jan 2026US 2026/0008004 A1Nitto Denko Corporation
- Processes to Clean Tail Gas from Carbon Black Production and System and Facility for Same4 Dec 2025US 2025/0367600 A1Cabot Corporation
- Process for reducing fossil co2 emissions17 Jul 2025US 2025/0229224 A1Paul Wurth S. A.
- Acidic gas recovery system and recovery method5 Jun 2025US 2025/0177912 A1Nitto Denko Corporation
- Method of producing liquid hydrocarbons from a syngas5 Jun 2025US 2025/0178985 A1Johnson Matthey Davy Technologies Limited
Most cited
By later US patents
- Surgery plume filter device and method of filtering123US 5,522,808 AEnviroSurgical, Inc. · 1996
- Process for production of elemental iron82US 7,931,731 B2Shell Oil Company · 2011
- Heaterless adsorption system for combined purification and fractionation of air52US 4,950,311 A1990
- Surgery plume filter device50US 5,288,469 AEnviroSurgical, Inc. · 1994
- Process for the removal of HCN from gas mixtures50US 5,660,807 AHuls Aktiengesellschaft · 1997