C08G 69/24
Pyrrolidones or piperidones
C08G69/24 (Pyrrolidones or piperidones) appears on 60 US grants and 31 published applications in this corpus.
Search patents in C08G- Granted patents
- 60
- Published applications
- 31
- Assignees
- 26
- Inventors
- 103
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 11 | 0 |
| 1979 | 8 | 0 |
| 1980 | 6 | 0 |
| 1981 | 9 | 0 |
| 1982 | 5 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 3 |
| 2015 | 1 | 0 |
| 2016 | 1 | 5 |
| 2017 | 2 | 0 |
| 2018 | 1 | 1 |
| 2019 | 3 | 3 |
| 2020 | 0 | 3 |
| 2021 | 1 | 4 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 1 | 1 |
| 2025 | 0 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Polyamide fine particles and method of producing the same24 Feb 2026US 12,559,597 B2Toray Industries, Inc.
- Cationic polymer with alkyl side chains and use for biomolecule delivery15 Oct 2024US 12,116,458 B2GenEdit Inc.
- Cellulose ether-lactam hybrid polymers, compositions, and methods for preparing and using the hybrid polymers12 Sep 2023US 11,753,484 B2Hercules Incorporated
- Method of producing polyamide fine particles, and polyamide fine particles27 Jun 2023US 11,685,813 B2Toray Industries, Inc.
- Method for detecting and quantifying additives used in the enhanced recovery of oil and shale gas26 Apr 2022US 11,313,800 B2Centre National De La Recherche Scientifique
- Polyamide resin, polyamide resin composition, molded body and method for producing polyamide resin18 Dec 2025US 2025/0382415 A1Kureha Corporation
- Ester-amide multi-block copolymer amd method for producing ester-amide multi-block copolymer, and ester-amide copolymer and method for producing ester-amide copolymer27 Nov 2025US 2025/0361361 A1National Institute of Advanced Industrial Science and Technology
- Nylon compositions12 Jun 2025US 2025/0188220 A1Sci-Lume Labs, Inc.
- Polyamide fine particles and method of producing the same25 Jan 2024US 2024/0026090 A1Toray Industries, Inc.
- Polyamide resin composition, molded polyamide resin article, and production method therefor22 Jun 2023US 2023/0192989 A1Kureha Corporation
Most cited
By later US patents
- Piperidino pyrrolidinones11US 4,309,546 ACiba-Geigy Corporation · 1982
- Quaternary ammonium catalyst system for the polymerization of 2-pyrrolidone8US 4,098,774 AChevron Research Company · 1978
- Phosphonium catalyst system for the polymerization of 2-pyrrolidone7US 4,192,939 AChevron Research Company · 1980
- Process for polymerization of 2-pyrrolidone6US 4,017,465 AChevron Research Company · 1977
- Photohalogenation of lactams and certain products thereof4US 3,945,897 AChevron Research Company · 1976