A01C 23/042
Adding fertiliser to watering systems
Official title: {Adding fertiliser to watering systems}
A01C23/042 (Adding fertiliser to watering systems) appears on 309 US grants and 300 published applications in this corpus.
Search patents in A01C- Granted patents
- 309
- Published applications
- 300
- Assignees
- 170
- Inventors
- 683
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 10 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 10 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 4 | 0 |
| 2000 | 8 | 0 |
| 2001 | 4 | 1 |
| 2002 | 2 | 9 |
| 2003 | 5 | 3 |
| 2004 | 5 | 7 |
| 2005 | 4 | 5 |
| 2006 | 5 | 10 |
| 2007 | 4 | 10 |
| 2008 | 1 | 5 |
| 2009 | 2 | 5 |
| 2010 | 5 | 11 |
| 2011 | 4 | 9 |
| 2012 | 3 | 7 |
| 2013 | 6 | 2 |
| 2014 | 8 | 10 |
| 2015 | 14 | 5 |
| 2016 | 9 | 15 |
| 2017 | 3 | 11 |
| 2018 | 10 | 18 |
| 2019 | 16 | 15 |
| 2020 | 15 | 22 |
| 2021 | 9 | 15 |
| 2022 | 12 | 24 |
| 2023 | 10 | 27 |
| 2024 | 19 | 18 |
| 2025 | 19 | 22 |
| 2026 | 10 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Liquid additive controller system and method for horticultural watering systems22 Sep 2026US 12,740,518 B2
- Sub-surface soil irrigation8 Sep 2026US 12,727,556 B2Irrovate (Pty) Ltd
- Device for diluting and mixing concentrated aqueous solutions21 Jul 2026US 12,685,250 B2Yara International Asa
- Methods of increasing irrigation water and fertilizer delivery to soil using formic acid and formate salts, making a formate salt from carbon dioxide, and generating a carbon credit21 Jul 2026US 12,686,652 B2Deerpoint Group, Inc.
- Device and method for combined generation and fertigation of nitrogen fertilizer7 Jul 2026US 12,672,602 B2Nitricity Inc.
- Method for reducing nitrogen and phosphorus emission in strawberry cultivation to mitigate continuous cropping obstacles in greenhouse8 Oct 2026US 2026/0305524 A1Shandong Academy of Agricultural Sciences
- On-Boom Sectional Recirculating Injection System8 Oct 2026US 2026/0305596 A1Latitude Limited
- Agricultural applicator10 Sep 2026US 2026/0262566 A1
- Hydrogel materials16 Jul 2026US 2026/0198409 A1Khalifa University of Science and Technology
- Plant nutrient preparation and delivery system2 Jul 2026US 2026/0182511 A1
Most cited
By later US patents
- Self-contained apparatus for admixing a plurality of liquids81US 4,790,454 AS. C. Johnson & Son, Inc. · 1988
- Methods, systems and apparatuses for automated irrigation and chemical treatment69US 7,264,177 B2Intelligent Lawn Systems, L.P. · 2007
- Automatic controller for injection of additives into irrigation water67US 4,917,304 AAvanti Manufacturing Co. · 1990
- Computer controlled fertigation system and method59US 7,809,475 B2FW Enviro, LLC · 2010
- Hose-end sprayer57US 4,349,157 AAcme Burgess, Inc. · 1982