Y02P 20/30
Improvements relating to adipic acid or caprolactam production
Y02P20/30 (Improvements relating to adipic acid or caprolactam production) appears on 14 US grants and 11 published applications in this corpus.
Search patents in Y02P- Granted patents
- 14
- Published applications
- 11
- Assignees
- 17
- Inventors
- 56
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 2 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 2 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for preparing linear hydrocarbon double acid with cyclic hydrocarbon oxidation catalyst24 Mar 2026US 12,583,811 B2Hanwha Solutions Corporation
- Method for producing adipic acid20 Jan 2026US 12,528,757 B2Toray Industries, Inc.
- Carbon-coated nickel-aluminum nanocomposite, preparation method therefor and application thereof11 Nov 2025US 12,467,622 B2China Petroleum & Chemical Corporation
- Process for preparation of nitrogen oxides and nitric acid from nitrous oxide17 May 2022US 11,332,370 B2Ascend Performance Materials Operations LLC
- Process for preparation of nitrogen oxides and nitric acid from nitrous oxide28 Jul 2020US 10,723,624 B2Ascend Performance Materials Operations LLC
- Method for preparing linear hydrocarbon double acid with cyclic hydrocarbon oxidation catalyst17 Oct 2024US 2024/0343668 A1Hanwha Solutions Corporation
- Method for producing adipic acid and cyclohexanone oxime from cyclohexane9 May 2024US 2024/0150274 A1Xiangtan University
- Carbon-coated Nickel-aluminum Nanocomposite, Preparation Method Therefor and Application Thereof24 Nov 2022US 2022/0370989 A1China Petroleum & Chemical Corporation
- Method for producing adipic acid10 Nov 2022US 2022/0356140 A1Toray Industries, Inc.
- Process for preparation of nitrogen oxides and nitric acid from nitrous oxide1 Oct 2020US 2020/0307999 A1Ascend Performance Materials Operations LLC
Most cited
By later US patents
- Nitrous oxide purification by pressure swing adsorption25US 6,080,226 AUop LLC · 2000
- Process for the catalytic decomposition of dinitrogen monoxide in a gas stream11US 5,587,135 ABASF SE · 1996
- Removal of nitrous oxide from gaseous effluents comprised thereof10US 5,582,810 AGrande-Paroisse S.A. · 1996
- Method and apparatus for decomposing N2O7US 6,500,398 B1Asahi Kasei Kabushiki Kaisha · 2002
- Process and installation for the recovery and/or purification of the nitrous oxide contained in a waste gas2US 6,348,083 B1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 2002