C01B 3/02
Production of hydrogen
Official title: Production of hydrogen; Production of gaseous mixtures containing hydrogen
C01B3/02 (Production of hydrogen) appears on 8,509 US grants and 10,551 published applications in this corpus.
Search patents in C01B- Granted patents
- 8,509
- Published applications
- 10,551
- Assignees
- 3,050
- Inventors
- 17,325
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 94 | 0 |
| 1977 | 84 | 0 |
| 1978 | 85 | 0 |
| 1979 | 46 | 0 |
| 1980 | 66 | 0 |
| 1981 | 55 | 0 |
| 1982 | 58 | 0 |
| 1983 | 67 | 0 |
| 1984 | 58 | 0 |
| 1985 | 51 | 0 |
| 1986 | 42 | 0 |
| 1987 | 58 | 0 |
| 1988 | 45 | 0 |
| 1989 | 65 | 0 |
| 1990 | 50 | 0 |
| 1991 | 50 | 0 |
| 1992 | 51 | 0 |
| 1993 | 51 | 0 |
| 1994 | 40 | 0 |
| 1995 | 36 | 0 |
| 1996 | 53 | 0 |
| 1997 | 62 | 0 |
| 1998 | 77 | 0 |
| 1999 | 88 | 0 |
| 2000 | 113 | 0 |
| 2001 | 125 | 70 |
| 2002 | 113 | 274 |
| 2003 | 166 | 320 |
| 2004 | 201 | 415 |
| 2005 | 182 | 394 |
| 2006 | 207 | 354 |
| 2007 | 191 | 398 |
| 2008 | 181 | 418 |
| 2009 | 230 | 459 |
| 2010 | 309 | 528 |
| 2011 | 306 | 490 |
| 2012 | 314 | 430 |
| 2013 | 364 | 405 |
| 2014 | 363 | 454 |
| 2015 | 412 | 473 |
| 2016 | 363 | 414 |
| 2017 | 343 | 389 |
| 2018 | 310 | 344 |
| 2019 | 311 | 303 |
| 2020 | 234 | 327 |
| 2021 | 247 | 349 |
| 2022 | 241 | 439 |
| 2023 | 323 | 525 |
| 2024 | 318 | 607 |
| 2025 | 349 | 582 |
| 2026 | 261 | 390 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01B 3/32By reaction of gaseous or liquid organic compounds with gasifying agents5,422
- C01B 3/06By reaction of inorganic compounds containing electro-positively bound hydrogen with inorganic reducing1,784
- C01B 3/04By decomposition of inorganic compounds949
- C01B 3/22By decomposition of gaseous or liquid organic compounds936
- C01B 3/025Preparation or purification of gas mixtures for ammonia synthesis283
Recent patents
- Containerized processing of activated aluminum6 Oct 2026US 12,752,248 B1Ltag Systems LLC
- Complex oxides for reactive oxygen separation and related applications6 Oct 2026US 12,752,260 B2North Carolina State University
- Immobolized organometallic catalyst and application of same6 Oct 2026US 12,752,265 B2Saudi Arabian Oil Company
- Method for synthesising a liquid organic hydrogen carrier (LOHC) loaded with hydrogen using hydrogen produced from a methanisation digestate6 Oct 2026US 12,753,071 B2Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Thermocatalytic decomposition of methane using catalyst system design and operational parameters to control product yield and properties6 Oct 2026US 12,753,072 B2Battelle Memorial Institute
- Hydrogen generation device8 Oct 2026US 2026/0307031 A1
- Electric radiant heating for direct conversion syngas reactor8 Oct 2026US 2026/0307033 A1Aether Fuels Pte. Ltd.
- Hydrogen production device8 Oct 2026US 2026/0307034 A1Mitsubishi Heavy Industries, Ltd.
- Hydrogen generation apparatus8 Oct 2026US 2026/0307037 A1
- Catalyst for methane reforming and manufacturing method thereof8 Oct 2026US 2026/0307056 A1Hanwha Solutions Corporation
Most cited
By later US patents
- Steam reformer with internal hydrogen purification533US 5,861,137 A1999
- Electro-mechanical interfaces to mount robotic surgical arms470US 7,762,825 B2Intuitive Surgical Operations, Inc. · 2010
- Process for the sensitization of an oxidation/reduction photocatalyst, and photocatalyst thus obtained420US 4,684,537 AR. E. Stiftung · 1987
- Method for simultaneous recovery of hydrogen from water and from hydrocarbons351US 5,525,322 AThe Regents of the University of California · 1996
- Method of methanol production328US 4,927,857 AEngelhard Corporation · 1990