System and method for recovering nutrients from a high nitrogenous liquid waste
US-2024083791-A1 · Mar 14, 2024 · US
Anaerobic digestion processes
Anaerobic digestion processes · 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 | C02F3/28 |
| Official title | Anaerobic digestion processes |
| Display label | Anaerobic digestion processes |
| Total patents | 214 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 24 |
| 2016 | 15 |
| 2017 | 22 |
| 2018 | 15 |
| 2019 | 15 |
| 2020 | 16 |
| 2021 | 24 |
| 2022 | 26 |
| 2023 | 14 |
| 2024 | 20 |
| 2025 | 15 |
| 2026 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Treatment of municipal wastewater with anaerobic digestion
US-9845260-B2 · Dec 19, 2017 · US
Ammonia Stripper
US-2017334739-A1 · Nov 23, 2017 · US
Treatment of waste products with anaerobic digestion
US-9809481-B2 · Nov 7, 2017 · US
Electrode, fuel cell and water treatment device
US-2017309942-A1 · Oct 26, 2017 · US
Anaerobic reactor for wastewater treatment
US-9758408-B2 · Sep 12, 2017 · US
Municipal Mixing with Reciprocating Motion Disk
US-2017253512-A1 · Sep 7, 2017 · US
Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars
US-2017247722-A1 · Aug 31, 2017 · US
Method for improving production of bio-hydrogen from waste water containing protein
US-9732360-B2 · Aug 15, 2017 · US
Apparatus and method for reduction in ammoniacal nitrogen from waste waters
US-9725338-B2 · Aug 8, 2017 · US
Water walls for life support
US-9714183-B1 · Jul 25, 2017 · US
Syngas biomethanation process and anaerobic digestion system
US-2017166930-A1 · Jun 15, 2017 · US
Bacterial cytochrome p450 protein variant and method of reducing concentration of fluorinated methane in sample using the same
US-2017159030-A1 · Jun 8, 2017 · US
Process for recovering elemental selenium from wastewater
US-2017158535-A1 · Jun 8, 2017 · US
System and method for converting organic waste into methane and other useful products
US-2017158539-A1 · Jun 8, 2017 · US
Method for treating a waste stream using a bioreactor and a membrane filter
US-9656895-B2 · May 23, 2017 · US
Sonicated biological hydrogen reactor
US-2017101616-A1 · Apr 13, 2017 · US
Method and apparatus for cleaning a rotating belt sieve
US-2017072345-A1 · Mar 16, 2017 · US
Highly effective sewage treatment based on regulation and control of directed electron flow and apparatus thereof
US-2017066668-A1 · Mar 9, 2017 · US
Syngas biomethanation process and anaerobic digestion system
US-9567247-B2 · Feb 14, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F3/28?
- CPC C02F3/28 is the Cooperative Patent Classification code for “Anaerobic digestion processes.”
- How many patents are filed under CPC C02F3/28 (Anaerobic digestion processes)?
- Our database includes 214 publications tagged with this CPC code.
- Is patent activity under CPC C02F3/28 growing?
- Publication counts under this code: 20 in 2024 vs 15 in 2025 (latest complete years).