C01B 21/0461
Carbon based materials
Official title: {Carbon based materials}
C01B21/0461 (Carbon based materials) appears on 24 US grants and 16 published applications in this corpus.
Search patents in C01B- Granted patents
- 24
- Published applications
- 16
- Assignees
- 15
- Inventors
- 69
- Latest grant
- 25 May 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 4 |
| 2011 | 0 | 0 |
| 2012 | 2 | 2 |
| 2013 | 2 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 2 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 3 |
| 2020 | 0 | 1 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Nitrogen service supply system25 May 2021US 11,014,039 B2Praxair Technology, Inc.
- Refrigerator6 Apr 2021US 10,966,442 B2Qingdao Haier Joint Stock Co., Ltd.
- Refrigerating and freezing device12 Jan 2021US 10,890,369 B2Qingdao Haier Joint Stock Co., Ltd.
- Method for producing nitrogen gas, method for separating gas and device for producing nitrogen gas7 Jun 2016US 9,359,203 B2Taiyo Nippon Sanso Corporation
- Method for purification of ammonia, mixtures of nitrogen and hydrogen, or nitrogen, hydrogen and ammonia1 Mar 2016US 9,272,906 B2Politechnika Warszawska
- Geothermally driven ammonia production1 May 2025US 2025/0136457 A1EnhancedGEO Holdings, LLC
- Nitrogen service supply system9 Jan 2020US 2020/0009493 A1Praxair Technology, Inc.
- Method for the Production of Highly Pure Birnessite26 Sep 2019US 2019/0292067 A1Prince Erachem SPRL
- Refrigerator23 May 2019US 2019/0150484 A1Qingdao Haier Joint Stock Co., Ltd.
- Refrigerating and freezing device16 May 2019US 2019/0145691 A1Qingdao Haier Joint Stock Co., Ltd.
Most cited
By later US patents
- Adsorbent for separating nitrogen from mixed gas of oxygen and nitrogen66US 6,916,358 B2Taiyo Nippon Sanso Corporation · 2005
- Non-thermofusible phenol resin powder, method for producing the same, thermosetting resin composition, sealing material for semiconductor, and adhesive for semiconductor65US 8,411,415 B2Air Water Inc. · 2013
- Air separation by pressure swing adsorption with a high capacity carbon molecular sieve41US 5,240,474 AAir Products and Chemicals, Inc. · 1993
- Process for the selective removal of trace amounts of oxygen from gases37US 4,734,273 AShell Oil Company · 1988
- Process for producing carbon molecular sieves29US 4,880,765 ABergwerksverband GmbH · 1989