C08F 22/04
Anhydrides
Official title: Anhydrides, e.g. cyclic anhydrides
C08F22/04 (Anhydrides) appears on 70 US grants and 59 published applications in this corpus.
Search patents in C08F- Granted patents
- 70
- Published applications
- 59
- Assignees
- 59
- Inventors
- 180
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 4 |
| 2014 | 3 | 4 |
| 2015 | 2 | 6 |
| 2016 | 1 | 6 |
| 2017 | 5 | 5 |
| 2018 | 3 | 7 |
| 2019 | 8 | 2 |
| 2020 | 7 | 7 |
| 2021 | 3 | 5 |
| 2022 | 9 | 0 |
| 2023 | 5 | 7 |
| 2024 | 1 | 0 |
| 2025 | 5 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for the production of biodegradable superabsorbent polymer with high absorbency under load based on styrene maleic acid copolymers and biopolymer15 Sep 2026US 12,734,270 B2Polygreen Ltd
- Metal-crosslinkable polymer composition, metal-crosslinked polymeric material, metal component, and wiring harness7 Oct 2025US 12,435,202 B2Autonetworks Technologies, Ltd.
- Method for setting polymerization condition and method for manufacturing optical material12 Aug 2025US 12,384,870 B2Mitsui Chemicals, Inc.
- Alternating copolymers of selected unsymmetrically substituted stilbenes and maleic anhydride or N-substituted maleimides15 Jul 2025US 12,359,008 B2Virginia Tech Intellectual Properties, Inc.
- Green, safe and environmentally-friendly process and production equipment for industrialized continuous large-scale production of formaldehyde-free water-based adhesive24 Jun 2025US 12,338,372 B2New Era Chemical Shan Dong Co., Ltd.
- Process for the production of biodegradable superabsorbent polymer with high absorbency under load based on styrene maleic acid copolymers and biopolymer23 Jan 2025US 2025/0025597 A1Polygreen Ltd
- Curable compound product23 Nov 2023US 2023/0373916 A1Daicel Corporation
- Surface-eroding photo-curable acrylated and methacrylated anhydride based resins21 Sep 2023US 2023/0295456 A1South Dakota Board of Regents
- Modified liquid diene rubbers, rubber compositions, and sealing materials31 Aug 2023US 2023/0272125 A1Kuraray Co., Ltd.
- Metal-crosslinkable polymer composition, metal-crosslinked polymeric material, metal component, and wiring harness24 Aug 2023US 2023/0265263 A1Autonetworks Technologies, Ltd.
Most cited
By later US patents
- Treatment of water37US 4,126,549 ACiba Geigy (UK) Limited · 1978
- Yarn sizes, sizing treatments and resulting sized yarns29US 3,981,836 ADan River Inc. · 1976
- Anhydride containing polymers derived from alkenyl succinic anhydride22US 4,374,235 AAshland Oil, Inc. · 1983
- Magnesium salt copolymers of unsaturated dicarboxylic acid anhydride and unsaturated monomer having a lipophile chain13US 3,936,427 ASociete Anonyme dite: L'Oreal · 1976
- Solidification matrix using a maleic-containing terpolymer binding agent12US 8,530,403 B2Ecolab USA Inc. · 2013