C12M 21/04
Bioreactors or fermenters specially adapted for specific uses: for producing gas
Official title: {for producing gas, e.g. biogas (digesters for manure with production of biogas A01C3/028, biological treatment of water, waste water or sewage C02F3/00, C02F11/02, preparation of natural gas or syngas C10L3/06, C10L3/10)}
C12M21/04 (Bioreactors or fermenters specially adapted for specific uses: for producing gas) appears on 850 US grants and 1,104 published applications in this corpus.
Search patents in C12M- Granted patents
- 850
- Published applications
- 1,104
- Assignees
- 742
- Inventors
- 2,186
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 11 | 0 |
| 1981 | 12 | 0 |
| 1982 | 13 | 0 |
| 1983 | 10 | 0 |
| 1984 | 11 | 0 |
| 1985 | 9 | 0 |
| 1986 | 16 | 0 |
| 1987 | 11 | 0 |
| 1988 | 8 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 10 | 0 |
| 1994 | 5 | 0 |
| 1995 | 10 | 0 |
| 1996 | 13 | 0 |
| 1997 | 7 | 0 |
| 1998 | 12 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 11 | 1 |
| 2002 | 17 | 12 |
| 2003 | 6 | 16 |
| 2004 | 10 | 26 |
| 2005 | 16 | 14 |
| 2006 | 11 | 34 |
| 2007 | 10 | 32 |
| 2008 | 12 | 42 |
| 2009 | 18 | 53 |
| 2010 | 26 | 67 |
| 2011 | 28 | 72 |
| 2012 | 42 | 67 |
| 2013 | 32 | 71 |
| 2014 | 47 | 55 |
| 2015 | 34 | 55 |
| 2016 | 33 | 48 |
| 2017 | 31 | 57 |
| 2018 | 33 | 34 |
| 2019 | 35 | 38 |
| 2020 | 31 | 33 |
| 2021 | 33 | 54 |
| 2022 | 26 | 48 |
| 2023 | 20 | 57 |
| 2024 | 28 | 40 |
| 2025 | 35 | 47 |
| 2026 | 20 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods and systems for producing cellulosic ethanol by biomass saccharification and fermentation8 Sep 2026US 12,729,388 B2Zhejiang Huakang Pharmaceutical Co., Ltd.
- Reduced-headspace digester1 Sep 2026US 12,722,994 B2Suez International
- Apparatus, system and method for automated food waste processing1 Sep 2026US 12,723,008 B2Ecotone Renewables PBC
- Approach for biogas generation18 Aug 2026US 12,709,762 B2Sixring Inc.
- Integrated system and method for methane production using off gas recycling to anaerobic digester from a gas separation membrane unit14 Jul 2026US 12,680,060 B2L' Air Liquide, Societe Anonyme pour I' Etude et I'Exploitation des Procedes Georges Claude
- Method for controlling biogas production processes and digester for biogas production1 Oct 2026US 2026/0297480 A1
- Biotechnological production of acetone1 Oct 2026US 2026/0297634 A1Evonik Operations GmbH
- Method of producing biogas10 Sep 2026US 2026/0265650 A1Verdalia Bioenergy Spain, S.L.
- Detection device and method for measuring anaerobic ammonium oxidation activity10 Sep 2026US 2026/0265669 A1China Three Gorges Corporation
- Biogas feed for carbon monoxide production27 Aug 2026US 2026/0250588 A1Topsoe A/S
Most cited
By later US patents
- Bioconversion of waste biomass to useful products285US 5,821,111 ABioengineering Resources, Inc. · 1998
- Processing biomass176US 7,932,065 B2Xyleco, Inc. · 2011
- Biological production of ethanol from waste gases with Clostridium ljungdahlii159US 6,136,577 ABioengineering Resources, Inc. · 2000
- Anaerobic digester system158US 6,299,774 B12001
- Methods for increasing the production of ethanol from microbial fermentation151US 7,285,402 B2Emmaus Foundation, Inc. · 2007