C08K 5/521
Esters of phosphoric acids
Official title: Esters of phosphoric acids, e.g. of H3PO4
C08K5/521 (Esters of phosphoric acids) appears on 1,552 US grants and 1,958 published applications in this corpus.
Search patents in C08K- Granted patents
- 1,552
- Published applications
- 1,958
- Assignees
- 758
- Inventors
- 4,634
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 14 | 0 |
| 1978 | 16 | 0 |
| 1979 | 7 | 0 |
| 1980 | 14 | 0 |
| 1981 | 20 | 0 |
| 1982 | 5 | 0 |
| 1983 | 9 | 0 |
| 1984 | 10 | 0 |
| 1985 | 14 | 0 |
| 1986 | 15 | 0 |
| 1987 | 18 | 0 |
| 1988 | 13 | 0 |
| 1989 | 17 | 0 |
| 1990 | 12 | 0 |
| 1991 | 22 | 0 |
| 1992 | 20 | 0 |
| 1993 | 16 | 0 |
| 1994 | 11 | 0 |
| 1995 | 13 | 0 |
| 1996 | 6 | 0 |
| 1997 | 23 | 0 |
| 1998 | 12 | 0 |
| 1999 | 15 | 0 |
| 2000 | 20 | 0 |
| 2001 | 23 | 7 |
| 2002 | 26 | 37 |
| 2003 | 30 | 39 |
| 2004 | 38 | 52 |
| 2005 | 22 | 34 |
| 2006 | 22 | 95 |
| 2007 | 17 | 59 |
| 2008 | 22 | 45 |
| 2009 | 39 | 56 |
| 2010 | 42 | 74 |
| 2011 | 49 | 63 |
| 2012 | 35 | 67 |
| 2013 | 44 | 89 |
| 2014 | 59 | 101 |
| 2015 | 51 | 99 |
| 2016 | 59 | 107 |
| 2017 | 76 | 96 |
| 2018 | 72 | 113 |
| 2019 | 74 | 110 |
| 2020 | 75 | 106 |
| 2021 | 73 | 113 |
| 2022 | 60 | 101 |
| 2023 | 47 | 84 |
| 2024 | 66 | 80 |
| 2025 | 43 | 72 |
| 2026 | 26 | 59 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Copolyetherester1 Sep 2026US 12,723,153 B2Celanese Polymers Holding, Inc.
- Diaphragm for miniature sound-generating device, and miniature sound-generating device25 Aug 2026US 12,720,262 B2Goertek Inc.
- Compound18 Aug 2026US 12,709,627 B2Sumitomo Chemical Company, Limited
- Flame retardant polyamide11 Aug 2026US 12,703,772 B2BASF SE
- Glass-fiber-containing flame-retardant polycarbonate resin composition and molded object4 Aug 2026US 12,698,378 B1Adeka Corporation
- Foamable Polyurethane Composition Comprising a Fatty Amide8 Oct 2026US 2026/0308307 A1Henkel AG & Co. KGaA
- Polycarbonate-based resin composition and molded article8 Oct 2026US 2026/0308318 A1Idemitsu Kosan Co., Ltd.
- Treatment agent for acrylic fibers and use of the same8 Oct 2026US 2026/0308815 A1Matsumoto Yushi-Seiyaku Co., Ltd.
- Flame retardant, composition, and molded article1 Oct 2026US 2026/0297296 A1Adeka Corporation
- Thermoplastic elastomer composition and elastomer material for tire using same1 Oct 2026US 2026/0297297 A1ENEOS Materials Corporation
Most cited
By later US patents
- Polymer mixture having aromatic polycarbonate, styrene I containing copolymer and/or graft polymer and a flame-retardant, articles formed therefrom120US 5,204,394 AGeneral Electric Company · 1993
- Reduced density article119US 10,087,556 B2Sabic Global Technologies B.V. · 2018
- Flame-retardant, high-impact polycarbonate molding compounds102US 5,061,745 ABayer Aktiengesellschaft · 1991
- Flame resistant polycarbonate/ABS moulding compounds resistant to stress cracking95US 5,672,645 ABayer Aktiengesellschaft · 1997
- Method of manufacture of cellulose ester film92US 5,219,510 AEastman Kodak Company · 1993