C08F 220/04
Acids
Official title: Acids; Metal salts or ammonium salts thereof
C08F220/04 (Acids) appears on 2,177 US grants and 2,588 published applications in this corpus.
Search patents in C08F- Granted patents
- 2,177
- Published applications
- 2,588
- Assignees
- 878
- Inventors
- 6,300
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 11 | 0 |
| 1978 | 7 | 0 |
| 1979 | 11 | 0 |
| 1980 | 8 | 0 |
| 1981 | 9 | 0 |
| 1982 | 12 | 0 |
| 1983 | 8 | 0 |
| 1984 | 12 | 0 |
| 1985 | 19 | 0 |
| 1986 | 10 | 0 |
| 1987 | 19 | 0 |
| 1988 | 12 | 0 |
| 1989 | 12 | 0 |
| 1990 | 24 | 0 |
| 1991 | 20 | 0 |
| 1992 | 20 | 0 |
| 1993 | 19 | 0 |
| 1994 | 17 | 0 |
| 1995 | 25 | 0 |
| 1996 | 20 | 0 |
| 1997 | 27 | 0 |
| 1998 | 24 | 0 |
| 1999 | 12 | 0 |
| 2000 | 23 | 0 |
| 2001 | 31 | 6 |
| 2002 | 26 | 23 |
| 2003 | 17 | 25 |
| 2004 | 14 | 32 |
| 2005 | 23 | 30 |
| 2006 | 20 | 47 |
| 2007 | 23 | 91 |
| 2008 | 29 | 73 |
| 2009 | 20 | 90 |
| 2010 | 54 | 122 |
| 2011 | 64 | 142 |
| 2012 | 72 | 128 |
| 2013 | 94 | 111 |
| 2014 | 116 | 115 |
| 2015 | 82 | 104 |
| 2016 | 91 | 110 |
| 2017 | 89 | 112 |
| 2018 | 90 | 117 |
| 2019 | 79 | 139 |
| 2020 | 110 | 184 |
| 2021 | 115 | 194 |
| 2022 | 113 | 173 |
| 2023 | 110 | 150 |
| 2024 | 132 | 119 |
| 2025 | 100 | 88 |
| 2026 | 70 | 63 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Super absorbent polymer and preparation method thereof6 Oct 2026US 12,752,254 B2LG Chem.Ltd.
- Preparation method of superabsorbent polymer6 Oct 2026US 12,752,255 B2LG Chem.Ltd.
- Super absorbent polymer29 Sep 2026US 12,746,530 B2LG Chem.Ltd.
- Resin composition comprising thermoplastic plastomer and hollow resin particles and molded product thereof22 Sep 2026US 12,742,070 B2Zeon Corporation
- Preparation method for superabsorbent polymer8 Sep 2026US 12,728,402 B2LG Chem.Ltd.
- Hydroxyl-modified binder and preparation method thereof, and secondary battery8 Oct 2026US 2026/0312057 A1Ningde Amperex Technology Limited
- Polymer, electrolyte composition, and battery1 Oct 2026US 2026/0297231 A1Kyoto University
- Method for manufacturing crosslinked polymer or salt thereof1 Oct 2026US 2026/0297232 A1Toagosei Co., Ltd.
- Binder for non-aqueous electrolyte secondary battery electrodes1 Oct 2026US 2026/0302241 A1Panasonic Energy Co., Ltd.
- Method of making water-soluble polymers for use as shale encapsulators for drilling fluids24 Sep 2026US 2026/0286026 A1BASF SE
Most cited
By later US patents
- Water-swellable copolymers and articles and coatings made therefrom1,443US 7,935,773 B2Tyco Healthcare Group LP · 2011
- Photoresist cross-linker and photoresist composition comprising the same474US 6,368,773 B1Hyundai Electronics Industries Co., Ltd. · 2002
- Water thickening agents consisting of copolymers of crosslinked acrylic acids and esters386US 4,509,949 AThe B. F. Goodrich Company · 1985
- Absorbent resin composition and process for producing same358US 4,286,082 ANippon Shokubai Kagaku Kogyo Co., Ltd. · 1981
- Aqueous-liquid and blood-absorbing powdery reticulated polymers, process for producing the same and their use as absorbents in sanitary articles299US 5,409,771 AChemische Fabrik Stockhausen GmbH · 1995