C01B 23/00
Noble gases
Official title: Noble gases; Compounds thereof (liquefying F25J {; noble gases obtained by rectification F25J3/028})
C01B23/00 (Noble gases) appears on 345 US grants and 254 published applications in this corpus.
Search patents in C01B- Granted patents
- 345
- Published applications
- 254
- Assignees
- 173
- Inventors
- 878
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 8 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 13 | 0 |
| 1990 | 6 | 0 |
| 1991 | 14 | 0 |
| 1992 | 11 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 6 | 0 |
| 1997 | 9 | 0 |
| 1998 | 14 | 0 |
| 1999 | 14 | 0 |
| 2000 | 10 | 0 |
| 2001 | 8 | 1 |
| 2002 | 4 | 8 |
| 2003 | 9 | 10 |
| 2004 | 6 | 8 |
| 2005 | 2 | 10 |
| 2006 | 1 | 6 |
| 2007 | 10 | 9 |
| 2008 | 6 | 3 |
| 2009 | 3 | 8 |
| 2010 | 4 | 9 |
| 2011 | 2 | 6 |
| 2012 | 8 | 9 |
| 2013 | 4 | 9 |
| 2014 | 11 | 13 |
| 2015 | 8 | 13 |
| 2016 | 9 | 15 |
| 2017 | 13 | 14 |
| 2018 | 8 | 18 |
| 2019 | 9 | 10 |
| 2020 | 10 | 10 |
| 2021 | 5 | 9 |
| 2022 | 9 | 11 |
| 2023 | 6 | 8 |
| 2024 | 6 | 15 |
| 2025 | 13 | 12 |
| 2026 | 6 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Lunar regolith processing system for mining and beneficiation8 Sep 2026US 12,729,625 B2Interlune Corporation
- Method of recycling helium from waste gas in semiconductor process1 Sep 2026US 12,722,973 B2Samsung Electronics Co., Ltd.
- Process and apparatus to recover helium23 Jun 2026US 12,662,379 B2The University of Western Australia
- Cryogenic process for crude helium recovery from natural gas12 May 2026US 12,623,905 B2Council of Scientific and Industrial Research
- Purification system for nitrogen gas and xenon gas in water and isotope static analysis method thereof3 Mar 2026US 12,566,154 B2Institute of Geology and Geophysics, Chinese Academy of Sciences
- Mixed gas separation device and mixed gas separation method27 Aug 2026US 2026/0250130 A1L'Air Liquide, Société Anonyme pour I'Etude et I'Exploitaion des Procédés Georges Claude
- Method for obtaining xenon using a molecular sieve20 Aug 2026US 2026/0242223 A1Linde Aktiengesellschaft
- Device for purifying and liquefying helium and associated method20 Aug 2026US 2026/0243504 A1Bruker Switzerland AG
- Process for producing very high purity helium or hydrogen30 Jul 2026US 2026/0217533 A1Air Liquide Advanced Technologies U.S. LLC
- Kiln exhaust gas regeneration apparatus and system, and kiln system16 Jul 2026US 2026/0199824 A1TDK Corporation
Most cited
By later US patents
- Etching method using noble gas halides179US 4,190,488 AInternational Business Machines Corporation · 1980
- Process for separating components of a gas stream137US 4,701,187 AAir Products and Chemicals, Inc. · 1987
- Process for the separation/recovery of gases114US 6,179,900 B2GKSS-Forschungszentrum Geesthacht GmbH · 2001
- PSA multicomponent separation utilizing tank equalization101US 4,816,039 AThe BOC Group, Inc. · 1989
- Process for recovering helium from a gas stream99US 5,224,350 AAdvanced Extraction Technologies, Inc. · 1993