A01C 23/023
For liquid or gas fertilisers
Official title: {for liquid or gas fertilisers}
A01C23/023 (For liquid or gas fertilisers) appears on 415 US grants and 314 published applications in this corpus.
Search patents in A01C- Granted patents
- 415
- Published applications
- 314
- Assignees
- 146
- Inventors
- 542
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 2 | 0 |
| 1986 | 13 | 0 |
| 1987 | 10 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 7 | 1 |
| 2002 | 7 | 11 |
| 2003 | 4 | 6 |
| 2004 | 6 | 10 |
| 2005 | 7 | 8 |
| 2006 | 9 | 3 |
| 2007 | 4 | 10 |
| 2008 | 4 | 4 |
| 2009 | 7 | 9 |
| 2010 | 9 | 10 |
| 2011 | 6 | 6 |
| 2012 | 7 | 10 |
| 2013 | 3 | 9 |
| 2014 | 9 | 13 |
| 2015 | 11 | 12 |
| 2016 | 13 | 18 |
| 2017 | 15 | 25 |
| 2018 | 26 | 26 |
| 2019 | 19 | 34 |
| 2020 | 24 | 12 |
| 2021 | 11 | 11 |
| 2022 | 9 | 14 |
| 2023 | 15 | 16 |
| 2024 | 8 | 14 |
| 2025 | 27 | 20 |
| 2026 | 7 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Aeration type variable-rate fertilization scarifier for tea garden25 Aug 2026US 12,714,008 B2
- Y-drop attachment for an agricultural applicator23 Jun 2026US 12,660,745 B1
- Plunger mixer device12 May 2026US 12,623,192 B2Sub-Mergent Technologies, Inc.
- Air-material mixing and spraying actuator with an application method thereof5 May 2026US 12,616,084 B2Chengdu Worang Zhichuang Technology Partnership (Limited Partnership)
- Device for shaping a furrow profile, sensing soil properties and dosing fluids17 Feb 2026US 12,550,808 B2Plantium S.A.
- System and method for determining flow rates of liquid fertilizers18 Jun 2026US 2026/0165234 A1Precision Planting LLC
- Implements and application units for placement of applications with respect to agricultural plants of agricultural fields12 Mar 2026US 2026/0068810 A1Precision Planting LLC
- Devices, systems, and methods for machinery monitoring and reporting4 Dec 2025US 2025/0367695 A1Ag Leader Technology
- Methods of Operating a Pulse Width Modulation Valve, and Related Agricultural Machines and Monitoring Systems27 Nov 2025US 2025/0359504 A1
- Nutrient injection assembly27 Nov 2025US 2025/0359506 A1
Most cited
By later US patents
- Liquid dispenser for seed planter188US 5,730,074 AFarmer Fabrications, Inc. · 1998
- High pressure liquid containment joint for hydraulic aerator149US 5,291,842 AThe Toro Company · 1994
- Liquid dispenser for seed planter128US 5,852,982 AFarmer Fabrications, Inc. · 1998
- Liquid distribution apparatus for distributing liquid into a seed furrow123US 6,453,832 B12002
- System and process for applying ammonia to soil119US 5,967,066 ACapstan Ag Systems, Inc. · 1999