B01D 3/4227
Head- and bottom stream
Official title: {Head- and bottom stream}
B01D3/4227 (Head- and bottom stream) appears on 27 US grants and 18 published applications in this corpus.
Search patents in B01D- Granted patents
- 27
- Published applications
- 18
- Assignees
- 15
- Inventors
- 77
- Latest grant
- 26 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 3 |
| 2023 | 3 | 2 |
| 2024 | 2 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stable isotope concentration method26 Nov 2024US 12,151,208 B2Taiyo Nippon Sanso Corporation
- Process for de-polymerization of styrenic monomer-containing polymers and for retrieval of styrenic monomers4 Jun 2024US 11,999,686 B2Ineos Styrolution Group GmbH
- Ethylene oxide purification15 Aug 2023US 11,724,976 B2Petron Scientech, Inc.
- Bioderived heat transfer fluids and methods of making the same15 Aug 2023US 11,725,093 B2Alliance for Sustainable Energy, LLC
- Ethylene oxide purification21 Mar 2023US 11,608,305 B2Petron Scientech, Inc.
- Distillation device and distillation method11 Jun 2026US 2026/0158411 A1Taiyo Nippon Sanso Corporation
- Reactive monomer separation device26 Mar 2026US 2026/0084075 A1LG Chem.Ltd.
- Ethylene oxide purification25 May 2023US 2023/0159419 A1Petron Scientech, Inc.
- Stable isotope concentration method6 Apr 2023US 2023/0104429 A1Taiyo Nippon Sanso Corporation
- Ethylene oxide purification3 Nov 2022US 2022/0348528 A1Petron Scientech, Inc.
Most cited
By later US patents
- Extractive distillation43US 4,371,427 APhillips Petroleum Company · 1983
- Fractionating column control apparatus and methods11US 5,047,125 AConoco Inc. · 1991
- Refrigerant separation system11US 5,749,245 AClimate Supply (Atlantic) Inc. · 1998
- Control of a fractional distillation process10US 4,377,443 APhillips Petroleum Company · 1983
- Reid Vapor Pressure determination and control in fractional distillation10US 4,578,151 APhillips Petroleum Company · 1986