C08G 2/18
Copolymerisation of aldehydes or ketones
C08G2/18 (Copolymerisation of aldehydes or ketones) appears on 139 US grants and 84 published applications in this corpus.
Search patents in C08G- Granted patents
- 139
- Published applications
- 84
- Assignees
- 56
- Inventors
- 324
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 6 | 0 |
| 1981 | 1 | 0 |
| 1982 | 8 | 0 |
| 1983 | 5 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 3 |
| 2003 | 3 | 2 |
| 2004 | 3 | 5 |
| 2005 | 1 | 2 |
| 2006 | 3 | 1 |
| 2007 | 1 | 2 |
| 2008 | 2 | 3 |
| 2009 | 0 | 3 |
| 2010 | 1 | 2 |
| 2011 | 3 | 0 |
| 2012 | 2 | 2 |
| 2013 | 1 | 1 |
| 2014 | 2 | 1 |
| 2015 | 2 | 1 |
| 2016 | 1 | 12 |
| 2017 | 7 | 2 |
| 2018 | 2 | 4 |
| 2019 | 2 | 4 |
| 2020 | 2 | 6 |
| 2021 | 4 | 2 |
| 2022 | 0 | 6 |
| 2023 | 2 | 6 |
| 2024 | 5 | 7 |
| 2025 | 0 | 5 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing polyoxymethylene polyoxyalkylene copolymers9 Jun 2026US 12,649,813 B2Power2Polymers GmbH
- Composition for use in sintered molded bodies and sintered molded body10 Mar 2026US 12,569,911 B2Asahi Kasei Kabushiki Kaisha
- Method for producing polyoxymethylene polyoxyalkylene block copolymers17 Sep 2024US 12,091,492 B2Covestro Intellectual Property GmbH & Co.KG
- Polyoxymethylene and method of producing same14 May 2024US 11,981,772 B2Asahi Kasei Kabushiki Kaisha
- Oxymethylene-copolymer manufacturing method23 Apr 2024US 11,965,058 B2Mitsubishi Gas Chemical Company, Inc.
- Method for the deactivation of an acid catalyst during the production process of a polyoxymethylene copolymer23 Jul 2026US 2026/0209432 A1Base SE
- Secondary battery9 Apr 2026US 2026/0100368 A1Daikin Industries, Ltd.
- Separator, battery cell, battery, and electric device13 Nov 2025US 2025/0349981 A1Contemporary Amperex Technology Co., Limited
- Polymer, electrode plate and associated battery cell, battery and electrical device31 Jul 2025US 2025/0246630 A1Contemporary Amperex Technology (Hong Kong) Limited
- Methods and formulations for sacrificial bracing, surface protection, and queue-time management using stimulus responsive polymers24 Apr 2025US 2025/0132195 A1Lam Research Corporation
Most cited
By later US patents
- Polymeric acetal carboxylates116US 4,144,226 AMonsanto Company · 1979
- Detergent compositions comprising polyacetal carboxylates67US 4,146,495 AMonsanto Company · 1979
- Polyoxymethylene fibrids, a process for their production and their use36US 4,493,751 AHoechst Aktiengesellschaft · 1985
- Process for continuously polymerizing trioxane22US 4,343,929 AMitsubishi Gas Chemical Company, Inc. · 1982
- Process for the preparation of polyacetal copolymers21US 5,587,449 AHoechst Aktiengesellschaft · 1996