C08G 69/16
Preparatory processes
C08G69/16 (Preparatory processes) appears on 431 US grants and 284 published applications in this corpus.
Search patents in C08G- Granted patents
- 431
- Published applications
- 284
- Assignees
- 198
- Inventors
- 1,006
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 8 | 0 |
| 1978 | 11 | 0 |
| 1979 | 6 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 7 | 0 |
| 1984 | 12 | 0 |
| 1985 | 12 | 0 |
| 1986 | 26 | 0 |
| 1987 | 14 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 10 | 0 |
| 1991 | 11 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 12 | 0 |
| 1999 | 11 | 0 |
| 2000 | 9 | 0 |
| 2001 | 15 | 2 |
| 2002 | 11 | 13 |
| 2003 | 13 | 16 |
| 2004 | 14 | 8 |
| 2005 | 9 | 7 |
| 2006 | 3 | 7 |
| 2007 | 1 | 4 |
| 2008 | 3 | 4 |
| 2009 | 2 | 8 |
| 2010 | 2 | 9 |
| 2011 | 2 | 9 |
| 2012 | 2 | 11 |
| 2013 | 4 | 12 |
| 2014 | 11 | 18 |
| 2015 | 13 | 12 |
| 2016 | 8 | 18 |
| 2017 | 12 | 11 |
| 2018 | 9 | 13 |
| 2019 | 9 | 22 |
| 2020 | 9 | 20 |
| 2021 | 13 | 14 |
| 2022 | 8 | 14 |
| 2023 | 11 | 16 |
| 2024 | 4 | 11 |
| 2025 | 11 | 4 |
| 2026 | 6 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Purification method for laurolactam6 Oct 2026US 12,753,280 B2Hanwha Solutions Corporation
- Flame retardant polyamide11 Aug 2026US 12,703,772 B2BASF SE
- Polyamides having cyclic terpenoid substructures10 Mar 2026US 12,570,800 B2Evonik Operations GmbH
- Method and device for the production of polyamide 6 pellets24 Feb 2026US 12,558,815 B2T.En Zimmer GmbH
- Polyamide fine particles and method of producing the same24 Feb 2026US 12,559,597 B2Toray Industries, Inc.
- Method for producing polyamide powder for 3d printing23 Jul 2026US 2026/0209436 A1Arkema France
- Polyamide resin, polyamide resin composition, molded body and method for producing polyamide resin18 Dec 2025US 2025/0382415 A1Kureha Corporation
- Branched, terminated polyamide compositions4 Dec 2025US 2025/0368779 A1AdvanSix Resins & Chemicals LLC
- High flow, dual-terminated polyamide polymers6 Nov 2025US 2025/0340700 A1AdvanSix Resins & Chemicals LLC
- Method of producing epsilon-caprolactam and method of producing polyamide 616 Jan 2025US 2025/0019516 A1Toray Industries, Inc.
Most cited
By later US patents
- Macromonomers having reactive side groups60US 5,869,592 AMaxdem Incorporated · 1999
- Process for separating low molecular weight compounds from an impure thermoplastic polymer or mixture53US 5,459,168 AFried. Krupp AG Hoesch-Krupp · 1995
- Pultrusion process for long fiber-reinforced nylon composites48US 5,424,388 AIndustrial Technology Research Institute · 1995
- Process for preparing polyamides44US 6,069,228 AE. I. Du Pont de Nemours and Company · 2000
- Manufacture of polylactams with initial pressures above vapor pressures of starting materials37US 4,049,638 ABASF SE · 1977