Process for preparing a sulphur-containing soil improver
US-2017327430-A1 · Nov 16, 2017 · US
Other inorganic fertilisers
Other inorganic fertilisers · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C05D9/00 |
| Official title | Other inorganic fertilisers |
| Display label | Other inorganic fertilisers |
| Total patents | 289 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 19 |
| 2016 | 23 |
| 2017 | 30 |
| 2018 | 27 |
| 2019 | 35 |
| 2020 | 33 |
| 2021 | 38 |
| 2022 | 20 |
| 2023 | 20 |
| 2024 | 26 |
| 2025 | 14 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Enhanced Biochar
US-9809502-B2 · Nov 7, 2017 · US
Biochar extracts and method for capturing material extracted from biochar
US-2017304791-A1 · Oct 26, 2017 · US
Gypsum fertilizer for blueberries and method for suppressing blueberry abscission
US-2017297964-A1 · Oct 19, 2017 · US
Conditioning agent for a particulate fertilizer for reducing hygroscopicity and dust formation
US-2017283339-A1 · Oct 5, 2017 · US
Biochars for use in composting
US-2017217848-A1 · Aug 3, 2017 · US
Fertilizer compositions and methods of making the same
US-9718738-B2 · Aug 1, 2017 · US
Additive infused biochar
US-2017210677-A1 · Jul 27, 2017 · US
Biochars and biochar treatment processes
US-2017204017-A1 · Jul 20, 2017 · US
Biochar aggregate particles
US-2017197192-A1 · Jul 13, 2017 · US
Biochar as a microbial carrier
US-2017174578-A1 · Jun 22, 2017 · US
Syngas biomethanation process and anaerobic digestion system
US-2017166930-A1 · Jun 15, 2017 · US
Method for enhancing soil growth using bio-char
US-2017152194-A1 · Jun 1, 2017 · US
Enhancing biochar performance using pyrolysis acid stream
US-2017152440-A1 · Jun 1, 2017 · US
Fuel compositions containing lignocellulosic biomass fermentation process syrup
US-2017145444-A1 · May 25, 2017 · US
Biochar suspended solution
US-2017137332-A1 · May 18, 2017 · US
Methods for application of biochar
US-2017096375-A1 · Apr 6, 2017 · US
Acid treatment for fertilizers to increase zinc solubility and availability
US-2017044078-A1 · Feb 16, 2017 · US
Enhancing biochar performance using pyrolysis acid stream
US-9527780-B2 · Dec 27, 2016 · US
Enhanced biochar
US-2016368831-A1 · Dec 22, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C05D9/00?
- CPC C05D9/00 is the Cooperative Patent Classification code for “Other inorganic fertilisers.”
- How many patents are filed under CPC C05D9/00 (Other inorganic fertilisers)?
- Our database includes 289 publications tagged with this CPC code.
- Is patent activity under CPC C05D9/00 growing?
- Publication counts under this code: 26 in 2024 vs 14 in 2025 (latest complete years).