Reducing the environmental impact of farming using biochar
US-2025213483-A1 · Jul 3, 2025 · US
Biological compost
Biological compost · 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 | C05F9/04 |
| Official title | Biological compost |
| Display label | Biological compost |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 8 |
| 2017 | 6 |
| 2018 | 2 |
| 2019 | 2 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 5 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multistage recycling method of magnesium modified carbon-based phosphorus adsorbent waste
US-2025187997-A1 · Jun 12, 2025 · US
Reducing the environmental impact of farming using biochar
US-12178910-B2 · Dec 31, 2024 · US
Composter
US-2024317652-A1 · Sep 26, 2024 · US
In-site composting system for community kitchen waste
US-2024318126-A1 · Sep 26, 2024 · US
Under-sink waste composter appliance
US-2024109818-A1 · Apr 4, 2024 · US
Apparatus method and composition for soil treatment
US-2024043746-A1 · Feb 8, 2024 · US
Reducing the environmental impact of farming using biochar
US-2023125341-A1 · Apr 27, 2023 · US
Organics recovery from dry fraction
US-11613484-B2 · Mar 28, 2023 · US
Reducing the environmental impact of farming using biochar
US-11426350-B1 · Aug 30, 2022 · US
Methods for Liberating Phosphorus from Organic Matter
US-2021161981-A1 · Jun 3, 2021 · US
Biochars for use in composting
US-10472297-B2 · Nov 12, 2019 · US
Method for the bioactivation of biochar for use as a soil amendment
US-10273195-B2 · Apr 30, 2019 · US
Method for making sequesterable biochar
US-9963650-B2 · May 8, 2018 · US
Production of biogas from organic materials
US-9879285-B2 · Jan 30, 2018 · US
Method for the bioactivation of biochar for use as a soil amendment
US-2017362134-A9 · Dec 21, 2017 · US
Method for preparing solid trichoderma seed from direct fermentation of crop straws with trichoderma, and product prepared by using the same
US-2017267599-A1 · Sep 21, 2017 · US
Biochars for use in composting
US-2017217848-A1 · Aug 3, 2017 · US
Method for the bioactivation of biochar for use as a soil amendment
US-2017190633-A1 · Jul 6, 2017 · US
Plant growth media
US-2017175394-A1 · Jun 22, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C05F9/04?
- CPC C05F9/04 is the Cooperative Patent Classification code for “Biological compost.”
- How many patents are filed under CPC C05F9/04 (Biological compost)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC C05F9/04 growing?
- Publication counts under this code: 5 in 2024 vs 2 in 2025 (latest complete years).