A62D 3/20
Processes for making harmful chemical substances harmless or less harmful, by effecting
Official title: by hydropyrolysis or destructive steam gasification, e.g. using water and heat or supercritical water, to effect chemical change
A62D3/20 (Processes for making harmful chemical substances harmless or less harmful, by effecting) appears on 51 US grants and 35 published applications in this corpus.
Search patents in A62D- Granted patents
- 51
- Published applications
- 35
- Assignees
- 43
- Inventors
- 130
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 7 | 0 |
| 1999 | 2 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 1 |
| 2002 | 2 | 1 |
| 2003 | 1 | 2 |
| 2004 | 0 | 5 |
| 2005 | 4 | 3 |
| 2006 | 0 | 4 |
| 2007 | 1 | 1 |
| 2008 | 2 | 2 |
| 2009 | 1 | 0 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 2 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Applying chemical oxygen demand and heating value diagnostics to enhance performance of a SCWO process5 May 2026US 12,617,705 B2374Water Inc.
- Installation and method for destroying pyrotechnic waste30 Dec 2025US 12,508,634 B2Roxel France
- Hydrothermal technology for decontamination and mineralization of perfluoro- and polyfluoroalkyl substance (PFAS) in wastes, concentrate solutions, and chemical stockpiles14 Feb 2023US 11,577,111 B2Colorado School of Mines
- Process for the destruction of matrix material by cavitation and acid-based chemical reaction22 Sep 2020US 10,780,306 B2
- Process for the disposal of acid wastes combining them with asbestos containing materials and/or concrete20 Aug 2019US 10,384,089 B2
- Method for extracting a solid energetic material from contaminated soil1 Oct 2026US 2026/0295646 A1
- Applying chemical oxygen demand and heating value diagnostics to enhance performance of a scwo process16 Jul 2026US 2026/0200782 A1374Water Inc.
- Method for decomposing polyfluorocarboxylic acids7 Mar 2024US 2024/0076254 A1AGC Inc.
- Applying chemical oxygen demand and heating value diagnostics to enhance performance of a scwo process1 Jun 2023US 2023/0166997 A1374Water Inc.
- Installation and method for destroying pyrotechnic waste13 Apr 2023US 2023/0111663 A1Roxel France
Most cited
By later US patents
- Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans from paper mill sludge44US 5,075,017 AKimberly-Clark Corporation · 1991
- Conversion of hazardous materials using supercritical water oxidation36US 5,133,877 AThe United States of America as represented by the United States Department of Energy · 1992
- Method of treating fluoride contaminated wastes26US 4,735,784 AMorrison-Knudsen Company, Inc. · 1988
- Waste processing method and waste processing apparatus23US 6,090,291 AKabushiki Kaisha Toshiba · 2000
- Integrated effluent treatment process for nitroaromatic manufacture19US 6,288,289 B1Noram Engineering and Constructors Ltd. · 2001