B01D 2257/20
Halogens or halogen compounds
B01D2257/20 (Halogens or halogen compounds) appears on 1,168 US grants and 1,473 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,168
- Published applications
- 1,473
- Assignees
- 827
- Inventors
- 3,496
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 7 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 12 | 0 |
| 1997 | 15 | 0 |
| 1998 | 25 | 0 |
| 1999 | 19 | 0 |
| 2000 | 17 | 0 |
| 2001 | 31 | 11 |
| 2002 | 26 | 33 |
| 2003 | 25 | 32 |
| 2004 | 24 | 41 |
| 2005 | 17 | 37 |
| 2006 | 24 | 29 |
| 2007 | 23 | 30 |
| 2008 | 17 | 44 |
| 2009 | 19 | 66 |
| 2010 | 35 | 62 |
| 2011 | 30 | 47 |
| 2012 | 37 | 55 |
| 2013 | 45 | 65 |
| 2014 | 51 | 62 |
| 2015 | 50 | 66 |
| 2016 | 55 | 82 |
| 2017 | 55 | 60 |
| 2018 | 57 | 88 |
| 2019 | 72 | 80 |
| 2020 | 59 | 75 |
| 2021 | 43 | 56 |
| 2022 | 55 | 76 |
| 2023 | 41 | 64 |
| 2024 | 52 | 75 |
| 2025 | 43 | 74 |
| 2026 | 35 | 63 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for removing HCL in chlorination reaction29 Sep 2026US 12,746,484 B2Hanwha Solutions Corporation
- Treatment method and device for waste plastic18 Aug 2026US 12,709,713 B2PetroChina Company Limited
- Method for the separation of phosphorus pentafluoride from hydrogen chloride11 Aug 2026US 12,702,948 B2Mexichem Fluor S.A. De C.V.
- Process for treating a gas stream from plastic pyrolisis and/or biomass pyrolisis, and installation for integration into a steam cracker11 Aug 2026US 12,703,671 B2Technip Energies France
- High efficiency trap for particle collection in a vacuum foreline21 Jul 2026US 12,689,010 B2APPLIED Materials.Inc.
- Gas processing device and gas production method8 Oct 2026US 2026/0307003 A1Hirata Corporation
- Abatement of effluent containing ammonium chloride8 Oct 2026US 2026/0307006 A1APPLIED Materials.Inc.
- Method for purifying bromine gas1 Oct 2026US 2026/0295496 A1Resonac Corporation
- Method for removing hydrogen fluoride24 Sep 2026US 2026/0284570 A1Resonac Corporation
- Air contactor24 Sep 2026US 2026/0284592 A1
Most cited
By later US patents
- Device for removal of contaminants from fluid streams235US 5,750,026 ACorning Incorporated · 1998
- Fluorine abatement using steam injection in oxidation treatment of semiconductor manufacturing effluent gases210US 6,423,284 B1Advanced Technology Materials, Inc. · 2002
- Environmental control unit, and air handling systems and methods using same100US 6,796,896 B22004
- Organic amine impregnated activated carbon91US 5,462,908 AHer Majesty the Queen in right of Canada, as represented by the Minister of National Defence · 1995
- Parallel plate apparatus for in-situ vacuum line cleaning for substrate processing equipment90US 6,193,802 B1APPLIED Materials.Inc. · 2001