C07D 201/12
By depolymerising polyamides
Official title: by depolymerising polyamides
C07D201/12 (By depolymerising polyamides) appears on 56 US grants and 29 published applications in this corpus.
Search patents in C07D- Granted patents
- 56
- Published applications
- 29
- Assignees
- 26
- Inventors
- 138
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 0 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 1 |
| 2002 | 3 | 2 |
| 2003 | 1 | 2 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 2 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 4 | 14 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for the recovery of epsilon-caprolactam from nylon 6-containing multi-component material18 Nov 2025US 12,473,255 B2HSCC Sustainable Venturing B.V.
- Process for the recovery of epsilon-caprolactam from polyamide 6 comprising fishing nets28 Oct 2025US 12,454,508 B2Cap III B. V.
- Process for the recovery of epsilon-caprolactam from nylon 6 comprising fishing nets7 Oct 2025US 12,435,041 B2Cap III B. V.
- Process for the recovery of epsilon-caprolactam from nylon 6-containing multi-component material29 Jul 2025US 12,371,407 B2Cap III B. V.
- Compositions and methods of preparation thereof28 Nov 2023US 11,827,591 B2Apeel Technology, Inc.
- Method for manufacturing cyclic lactam and device for manufacturing cyclic lactam13 Aug 2026US 2026/0234105 A1Mitsubishi Gas Chemical Company, Inc.
- High-yield production of epsilon-caprolactam from nylon 6 plastic waste via ammonia-assisted depolymerization11 Dec 2025US 2025/0376442 A1Alliance for Sustainable Energy, LLC
- Method of producing thermoplastic resin11 Sep 2025US 2025/0282925 A1Toray Industries, Inc.
- Process for the recovery of epsilon-caprolactam from nylon 6-containing multi-component material21 Aug 2025US 2025/0263369 A1Cap III B. V.
- Method of collecting e-caprolactam and polyamide 6 oligomer, and method of producing polyamide 614 Aug 2025US 2025/0257037 A1Toray Industries, Inc.
Most cited
By later US patents
- Reclaiming .epsilon.-caprolactam from nylon 6 carpet62US 5,169,870 ABASF SE · 1992
- Depolymerization of condensation polymers52US 4,605,762 ACelanese Mexicana S.A. · 1986
- Process for the preparation of ε-caprolactam49US 6,660,857 B2Dsm N. V. · 2003
- Monomer recovery from multi-component materials38US 5,656,757 AAlliedSignal Inc. · 1997
- Method of recovering caprolactam from mixed waste37US 5,241,066 ABASF SE · 1993