C04B 2235/449
Organic acids
Official title: Organic acids, e.g. EDTA, citrate, acetate, oxalate
C04B2235/449 (Organic acids) appears on 534 US grants and 695 published applications in this corpus.
Search patents in C04B- Granted patents
- 534
- Published applications
- 695
- Assignees
- 387
- Inventors
- 1,670
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 6 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 10 | 3 |
| 2002 | 12 | 10 |
| 2003 | 16 | 27 |
| 2004 | 21 | 43 |
| 2005 | 10 | 40 |
| 2006 | 19 | 40 |
| 2007 | 25 | 40 |
| 2008 | 19 | 34 |
| 2009 | 23 | 32 |
| 2010 | 24 | 58 |
| 2011 | 34 | 39 |
| 2012 | 20 | 34 |
| 2013 | 23 | 28 |
| 2014 | 30 | 33 |
| 2015 | 25 | 32 |
| 2016 | 26 | 29 |
| 2017 | 23 | 25 |
| 2018 | 18 | 31 |
| 2019 | 19 | 23 |
| 2020 | 28 | 21 |
| 2021 | 11 | 20 |
| 2022 | 19 | 16 |
| 2023 | 12 | 18 |
| 2024 | 8 | 10 |
| 2025 | 8 | 6 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ceramic article, semiconductor apparatus for manufacturing a semiconductor structure and method of manufacturing a ceramic article25 Aug 2026US 12,715,816 B2Taiwan Semiconductor Manufacturing Company.Ltd
- High filtration efficiency particulate filters having bimodal pore size distribution made from beads with open porosity11 Aug 2026US 12,702,946 B2Corning Incorporated
- Preparation method and use of high-entropy alloy (HEA)@carbon fiber composite nanomaterial28 Jul 2026US 12,692,198 B2Yangtze University
- Inorganic structure and method for producing same2 Jun 2026US 12,643,827 B2Panasonic Intellectual Property Management Co., Ltd.
- Ferroelectric-piezoelectric ceramic energy storage materials, hybrid process preparation methods, and use thereof5 May 2026US 12,620,529 B1Tongji University
- High-Entropy Alloy Sulfide/Two-Dimensional Nano Composite Material, Preparation Method Therefor, and Application Thereof27 Aug 2026US 2026/0250204 A1C-Star (Guangzhou) Nano Materials Co., Ltd
- Ceramic articles made from ceramic beads with open porosity2 Jul 2026US 2026/0184643 A1Corning Incorporated
- Unshaped refractory material, method of producing a moist unshaped refractory material and method of making a refractory lining12 Mar 2026US 2026/0070847 A1Refractory Intellectual Property GmbH & Co.KG
- Preparation method and use of high-entropy alloy (hea)@carbon fiber composite nanomaterial2 Oct 2025US 2025/0304503 A1Yangtze University
- Lithium iron phosphate/carbon/lithium-rich lithium iron oxide composite cathode material and preparation method and application thereof25 Sep 2025US 2025/0300169 A1Yinzhu (Ningbo) Technology Limited
Most cited
By later US patents
- Polycrystalline translucent alumina-based ceramic material, uses, and methods166US 6,878,456 B23M Innovative Properties Company · 2005
- Very high purity fine powders and methods to produce such powders142US 6,569,397 B12003
- Non-frangible alumina-silica fibers117US 4,047,965 AMinnesota Mining and Manufacturing Company · 1977
- High purity fine metal powders and methods to produce such powder117US 6,786,950 B2NanoProducts Corporation · 2004
- Mixed-metal oxide particles by liquid feed flame spray pyrolysis of oxide precursors in oxygenated solvents114US 7,220,398 B2TAL Materials & The Regents of the University of Michigan · 2007