C01B 3/0089
Ortho-para conversion
C01B3/0089 (Ortho-para conversion) appears on 11 US grants and 20 published applications in this corpus.
Search patents in C01B- Granted patents
- 11
- Published applications
- 20
- Assignees
- 19
- Inventors
- 57
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 2 |
| 2018 | 0 | 0 |
| 2019 | 2 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 2 |
| 2025 | 0 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Installation and method for liquefying hydrogen26 May 2026US 12,638,233 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Ortho-H2 refueling for extended cryogenic pressure vessel dormancy19 Nov 2019US 10,479,678 B2Lawrence Livermore National Security, LLC
- Para-orthohydrogen conversion using a vortex tube8 Oct 2019US 10,435,294 B2Washington State Universiy
- Catalyst for conversion and equilibration of para and ortho hydrogen25 Jul 2017US 9,714,168 B1Air Products and Chemicals, Inc.
- Hydrogen liquefaction method and liquefier25 Oct 2011US 8,042,357 B2Praxair Technology, Inc.
- Method for converting orthohydrogen to parahydrogen10 Sep 2026US 2026/0265050 A1
- Hydrogen catalyst for vehicle cooling19 Feb 2026US 2026/0049695 A1Daimler Truck North America LLC
- Systems and methods for generation of hyperpolarized materials25 Sep 2025US 2025/0296069 A1Nvision Imaging Technologies GmbH
- Systems and methods for converting ortho hydrogen to para hydrogen19 Jun 2025US 2025/0197203 A1Chevron U.S.A.Inc.
- Temperature control device for liquid hydrogen storage tank, and liquid hydrogen storage system using same13 Jun 2024US 2024/0191841 A1
Most cited
By later US patents
- Nanotechnology for engineering the performance of substances140US 6,531,704 B2NanoProducts Corporation · 2003
- Cryogenic system8US 7,310,954 B2Kabushiki Kaisha Kobe Seiko Sho · 2007
- Cooling by conversion of para to ortho-hydrogen6US 4,393,039 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1983
- Method and device for liquefying hydrogen4US 7,040,119 B2Linde Aktiengesellschaft · 2006
- Process for ortho-para-hydrogen conversion3US 4,205,056 AJapan Synthetic Rubber Co., Ltd. · 1980