C08F 220/56
Acrylamide
Official title: Acrylamide; Methacrylamide
C08F220/56 (Acrylamide) appears on 1,055 US grants and 1,285 published applications in this corpus.
Search patents in C08F- Granted patents
- 1,055
- Published applications
- 1,285
- Assignees
- 639
- Inventors
- 3,382
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 8 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 13 | 0 |
| 1985 | 14 | 0 |
| 1986 | 8 | 0 |
| 1987 | 10 | 0 |
| 1988 | 14 | 0 |
| 1989 | 7 | 0 |
| 1990 | 10 | 0 |
| 1991 | 17 | 0 |
| 1992 | 9 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 11 | 0 |
| 2000 | 8 | 0 |
| 2001 | 13 | 4 |
| 2002 | 15 | 5 |
| 2003 | 11 | 10 |
| 2004 | 4 | 13 |
| 2005 | 10 | 15 |
| 2006 | 5 | 26 |
| 2007 | 11 | 25 |
| 2008 | 12 | 24 |
| 2009 | 8 | 40 |
| 2010 | 10 | 35 |
| 2011 | 25 | 39 |
| 2012 | 22 | 46 |
| 2013 | 20 | 47 |
| 2014 | 38 | 49 |
| 2015 | 35 | 49 |
| 2016 | 47 | 60 |
| 2017 | 40 | 59 |
| 2018 | 49 | 80 |
| 2019 | 56 | 99 |
| 2020 | 60 | 114 |
| 2021 | 78 | 109 |
| 2022 | 63 | 85 |
| 2023 | 88 | 78 |
| 2024 | 61 | 79 |
| 2025 | 63 | 62 |
| 2026 | 23 | 33 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Uncharged clay blocking agent6 Oct 2026US 12,753,119 B2BASF SE
- Acrylic rubber, rubber composition and rubber crosslinked product6 Oct 2026US 12,753,258 B2Zeon Corporation
- Method of preparing aldehyde-functionalized polymers29 Sep 2026US 12,747,307 B2Ecolab USA Inc.
- Binder composition for non-aqueous secondary battery electrode, slurry composition for non-aqueous secondary battery electrode, electrode for non-aqueous secondary battery, and non-aqueous secondary battery15 Sep 2026US 12,738,501 B2Zeon Corporation
- Liquid compositions, uses and method of making the same25 Aug 2026US 12,714,981 B1Stewart Superabsorbents, LLC
- The method of obtaining polyacrylamide hydrogels through continuous frontal polymerization8 Oct 2026US 2026/0307050 A1Green Evolution Technologies, Inc.
- Crystallization-driven self-strengthening polymers and associated compositions and methods24 Sep 2026US 2026/0286030 A1The Regents of the University of Colorado, a body corporate
- Method of using inverse emulsion polymer17 Sep 2026US 2026/0275003 A1TouGas Holding GmbH
- Materials showing asymetric response to mechanical force3 Sep 2026US 2026/0258223 A1Riken
- Fast-dissolving polyacrylamide for offshore oil displacement and preparation method thereof3 Sep 2026US 2026/0258294 A1Henan Zhengjia Green Energy Co., Ltd.
Most cited
By later US patents
- Hydrogels having enhanced elasticity and mechanical strength properties280US 6,960,617 B2Purdue Research Foundation · 2005
- Compositions, methods, and systems for bead formation using improved polymers188US 10,590,244 B210x Genomics, Inc. · 2020
- Acrylamide-dialkylaminoacrylate-dialkylaminomethacrylate cationic polyelectrolytes and their production187US 4,628,078 AAllied Colloids Limited · 1986
- Solubilizable polyacrylamide gels containing disulfide cross-linkages166US 4,124,638 A1978
- Compositions and methods for selective modification of subterranean formation permeability166US 6,228,812 B1BJ Services Company · 2001