B01D 2252/20442
Containing a piperidine-ring
Official title: containing a piperidine-ring
B01D2252/20442 (Containing a piperidine-ring) appears on 43 US grants and 72 published applications in this corpus.
Search patents in B01D- Granted patents
- 43
- Published applications
- 72
- Assignees
- 41
- Inventors
- 197
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2011 | 0 | 5 |
| 2012 | 0 | 6 |
| 2013 | 3 | 6 |
| 2014 | 5 | 6 |
| 2015 | 1 | 3 |
| 2016 | 3 | 7 |
| 2017 | 4 | 4 |
| 2018 | 3 | 6 |
| 2019 | 5 | 6 |
| 2020 | 5 | 5 |
| 2021 | 4 | 3 |
| 2022 | 2 | 3 |
| 2023 | 0 | 0 |
| 2024 | 3 | 5 |
| 2025 | 3 | 3 |
| 2026 | 2 | 4 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Solvent systems for carbon dioxide capture and methods of making and using said systems14 Jul 2026US 12,678,729 B2Schlumberger Technology Corporation
- Amine solvent-based carbon capture compositions10 Feb 2026US 12,544,708 B2International Business Machines Corporation
- Compositions and methods for carbon dioxide capture4 Nov 2025US 12,458,920 B2The Board of Trustees of the University of Illinois
- Absorption medium and method for removing carbon dioxide from combustion exhaust gas10 Jun 2025US 12,325,005 B1EOG Resources, Inc.
- Simulation of unit operations of a chemical plant for acid gas removal22 Apr 2025US 12,282,722 B2BASF SE
- Non-aqueous solvent formulations for acid gas capture18 Jun 2026US 2026/0166475 A1Research Triangle Institute
- Carbon dioxide absorbent containing ionic material containing cyclic ammonium cation and hydroxide anion, and carbon dioxide separation method using the same23 Apr 2026US 2026/0108843 A1SK Innovation Co., Ltd.
- Electrochemical systems for capture of acid gases12 Feb 2026US 2026/0042063 A1
- Carbon dioxide absorbent containing ionic material containing spiro ammonium cation and hydroxide anion, and carbon dioxide separation method using the same1 Jan 2026US 2026/0001056 A1SK Innovation Co., Ltd.
- Solvent systems for carbon dioxide capture and methods of making and using said systems22 May 2025US 2025/0161867 A1Schlumberger Technology Corporation
Most cited
By later US patents
- CO2 absorption from gas mixtures using an aqueous solution of 4-amino-2,2,6,6-tetramethylpiperidine15US 8,500,892 B2Evonik Degussa GmbH · 2013
- CO2 absorption from gas mixtures using an aqueous solution of 4-amino-2,2,6,6-tetramethylpiperidine13US 8,500,867 B2Evonik Degussa GmbH · 2013
- CO2 absorption from gas mixtures using an aqueous solution of 4-amino-2,2,6,6-tetramethyl piperidine12US 8,623,123 B2Evonik Degussa GmbH · 2014
- Amine-containing absorption medium, process and apparatus for absorption of acidic gases from gas mixtures10US 8,784,537 B2Evonik Degussa GmbH · 2014
- Method and device for separating acid gases from a gas mixture10US 9,221,007 B2Evonik Degussa GmbH · 2015