A01C 23/021
Sludge injectors, i.e. liquid manure injectors
Official title: {Sludge injectors, i.e. liquid manure injectors}
A01C23/021 (Sludge injectors, i.e. liquid manure injectors) appears on 66 US grants and 48 published applications in this corpus.
Search patents in A01C- Granted patents
- 66
- Published applications
- 48
- Assignees
- 42
- Inventors
- 76
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 1 |
| 2004 | 2 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 3 |
| 2009 | 1 | 1 |
| 2010 | 4 | 3 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 2 | 1 |
| 2014 | 4 | 4 |
| 2015 | 1 | 3 |
| 2016 | 1 | 1 |
| 2017 | 2 | 3 |
| 2018 | 2 | 4 |
| 2019 | 4 | 3 |
| 2020 | 3 | 2 |
| 2021 | 2 | 2 |
| 2022 | 3 | 2 |
| 2023 | 1 | 3 |
| 2024 | 2 | 1 |
| 2025 | 2 | 3 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus for injecting manure into the ground11 Aug 2026US 12,702,082 B2
- Systems, methods and apparatuses for liquid manure spreading14 Jul 2026US 12,677,731 B2
- Systems and methods for handling fluid for application to agricultural fields23 Jun 2026US 12,660,744 B2Capstan Ag Systems, Inc.
- Macerator24 Mar 2026US 12,582,995 B2Mastek Limited
- Systems and methods for biochar-based soil carbon sequestration1 Jul 2025US 12,342,747 B2Climate LLC
- Systems and methods for handling fluid for application to agricultural fields1 Oct 2026US 2026/0293796 A1Capstan Ag Systems, Inc.
- Pipe bridge for liquid transport30 Oct 2025US 2025/0334205 A1
- Systems and methods for biochar-based soil carbon sequestration10 Apr 2025US 2025/0113767 A1Climate LLC
- Method of field preparation for planting using ripper, and tractor with injector for deep application and mixing of amendment with soil20 Mar 2025US 2025/0089601 A1Monterey Pacific Inc.
- Apparatus for injecting manure into the ground18 Jul 2024US 2024/0237571 A1
Most cited
By later US patents
- Farming applicator81US 6,701,856 B1Winske, Inc. · 2004
- Side dressing fertilizer coulter65US 8,910,581 B2Dawn Equipment Company · 2014
- Liquid manure system32US 4,014,271 AThe Calumet Co., Inc. · 1977
- Fertilizer distribution head and dispensing chute29US 5,271,567 AAg-Chem Equipment Co., Inc. · 1993
- Turf injector with ground slitting knives28US 6,038,989 AThe Toro Company · 2000