A62D 3/40
Processes for making harmful chemical substances harmless or less harmful, by effecting
Official title: by heating to effect chemical change, e.g. pyrolysis
A62D3/40 (Processes for making harmful chemical substances harmless or less harmful, by effecting) appears on 99 US grants and 70 published applications in this corpus.
Search patents in A62D- Granted patents
- 99
- Published applications
- 70
- Assignees
- 86
- Inventors
- 263
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 3 |
| 2003 | 2 | 3 |
| 2004 | 1 | 1 |
| 2005 | 2 | 3 |
| 2006 | 2 | 3 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 2 | 0 |
| 2010 | 0 | 3 |
| 2011 | 0 | 0 |
| 2012 | 0 | 4 |
| 2013 | 1 | 1 |
| 2014 | 2 | 1 |
| 2015 | 2 | 6 |
| 2016 | 3 | 2 |
| 2017 | 2 | 0 |
| 2018 | 2 | 1 |
| 2019 | 0 | 1 |
| 2020 | 0 | 2 |
| 2021 | 1 | 4 |
| 2022 | 3 | 5 |
| 2023 | 3 | 7 |
| 2024 | 2 | 6 |
| 2025 | 4 | 6 |
| 2026 | 1 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus and method for denaturing asbestos18 Aug 2026US 12,708,935 B2Thermachange Ltd
- Installation and method for destroying pyrotechnic waste30 Dec 2025US 12,508,634 B2Roxel France
- Composition and method for capture and degradation of PFAS3 Jun 2025US 12,319,594 B2Battelle Memorial Institute
- Systems and methods for treating contaminated solid material28 Jan 2025US 12,208,297 B2Chevron U.S.A.Inc.
- Process for debromination of novel brominated flame retardants using Zn-based additives21 Jan 2025US 12,202,780 B1United Arab Emirates University
- Hydrothermal treatment of polymers containing perfluroalkyl and/or halogenated compounds8 Oct 2026US 2026/0308349 A1
- Method for removing pfas comprised in waste10 Sep 2026US 2026/0263857 A1Sarp Industries
- Method and system for degradation of perfluorooctane sulfonate27 Aug 2026US 2026/0249125 A1Beijing Jiaotong University
- Pfas chemical destruction process by alkoxides in water20 Aug 2026US 2026/0242266 A1Perma-Fix Environmental Services, Inc.
- Thermal destruction reservoir system9 Apr 2026US 2026/0097250 A1
Most cited
By later US patents
- Plasma arc decomposition of hazardous wastes into vitrified solids and non-hazardous gasses68US 5,451,738 AItex Enterprises Services, Inc. · 1995
- Plasma arc decomposition of hazardous wastes into vitrified solids and non-hazardous gasses66US 5,541,386 AIrm LLC · 1996
- Plasma arc decomposition of hazardous wastes into vitrified solids and non-hazardous gasses61US 5,319,176 A1994
- Apparatus for rendering PCB virulence-free38US 4,481,891 AKabushiki Kaisah Kitamuragokin Seisakusho · 1984
- Process for the pyrolysis of waste materials37US 4,303,477 ABabcock Krauss-Maffei Industrieanlagen GmbH · 1981