B01D 3/36
Azeotropic distillation
B01D3/36 (Azeotropic distillation) appears on 226 US grants and 244 published applications in this corpus.
Search patents in B01D- Granted patents
- 226
- Published applications
- 244
- Assignees
- 173
- Inventors
- 635
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 7 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 6 |
| 2003 | 1 | 7 |
| 2004 | 3 | 3 |
| 2005 | 2 | 2 |
| 2006 | 4 | 3 |
| 2007 | 3 | 5 |
| 2008 | 6 | 2 |
| 2009 | 1 | 4 |
| 2010 | 4 | 8 |
| 2011 | 4 | 13 |
| 2012 | 1 | 4 |
| 2013 | 9 | 9 |
| 2014 | 7 | 6 |
| 2015 | 11 | 12 |
| 2016 | 2 | 8 |
| 2017 | 2 | 13 |
| 2018 | 14 | 19 |
| 2019 | 29 | 22 |
| 2020 | 18 | 16 |
| 2021 | 11 | 9 |
| 2022 | 9 | 17 |
| 2023 | 4 | 12 |
| 2024 | 8 | 14 |
| 2025 | 7 | 18 |
| 2026 | 5 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Recovering mono-ethylene glycol8 Sep 2026US 12,729,173 B2Changchun Meihe Science and Technology Development Co., Ltd.
- Methods for removal of sulfur dioxide (SO2) from trifluoroacetyl chloride (TFAC)14 Jul 2026US 12,679,800 B2Solstice Advanced Materials US, Inc.
- Method for producing radioactive labeled substance, device for producing radioactive labeled substance, and method for evaporatively concentrating radioactive metal nuclide7 Jul 2026US 12,673,906 B2National Institutes for Quantum Science and Technology
- Direct rectification of molecular sieve regenerant and method of using the same7 Jul 2026US 12,674,122 B2IntegroEnergy Technologies LLC
- Production system, production method and application of general-purpose high-purity chemicals3 Feb 2026US 12,539,471 B2Beijing University of Chemical Technology
- Azeotropic compositions comprising hydrogen fluoride8 Oct 2026US 2026/0308089 A1The Chemours Company Fc, LLC
- Methods for removal of sulfur dioxide (so2) from trifluoroacetyl chloride (tfac)3 Sep 2026US 2026/0257984 A1Solstice Advanced Materials US, Inc.
- Azeotrope or azeotrope-like compositions of trifluoroiodomethane (cf3i) and water13 Aug 2026US 2026/0233046 A1Honeywell International Inc.
- Dimethyl ether (dme) synthesis13 Aug 2026US 2026/0234086 A1Lummus Technology Inc.
- Method for purifying isopropyl alcohol13 Aug 2026US 2026/0234087 A1LG Chem.Ltd.
Most cited
By later US patents
- Process for washing semiconductor substrate with organic solvent82US 4,788,043 ATokuyama Soda Kabushiki Kaisha · 1988
- Process for azeotropic distillation63US 4,204,915 AMitsui Petrochemical Industries, Ltd. · 1980
- Process for transportation and distillation of petroleum with methanol55US 4,243,493 AMannesmannrohren-Werke AG · 1981
- Recovery of 1,1-dihydroheptafluorobutanol from water by distillation49US 4,224,112 APhillips Petroleum Company · 1980
- Recovery of methyl heptafluorobutyrate from methanol by distillation46US 4,229,263 APhillips Petroleum Company · 1980