C21B 5/003
Injection of pulverulent coal
Official title: {Injection of pulverulent coal}
C21B5/003 (Injection of pulverulent coal) appears on 155 US grants and 75 published applications in this corpus.
Search patents in C21B- Granted patents
- 155
- Published applications
- 75
- Assignees
- 94
- Inventors
- 367
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 10 | 0 |
| 1984 | 11 | 0 |
| 1985 | 8 | 0 |
| 1986 | 11 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 1 | 4 |
| 2012 | 1 | 4 |
| 2013 | 3 | 3 |
| 2014 | 3 | 2 |
| 2015 | 2 | 19 |
| 2016 | 2 | 4 |
| 2017 | 7 | 3 |
| 2018 | 4 | 2 |
| 2019 | 6 | 1 |
| 2020 | 2 | 3 |
| 2021 | 1 | 2 |
| 2022 | 2 | 8 |
| 2023 | 0 | 3 |
| 2024 | 1 | 2 |
| 2025 | 2 | 1 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Biocarbon pellets with adjustable grindability index16 Jun 2026US 12,655,362 B2Carbon Technology Holdings, LLC
- Method for operating blast furnace12 May 2026US 12,624,404 B2Jfe Steel Corporation
- Method for operation of blast furnace3 Mar 2026US 12,565,688 B2Kobe Steel, Ltd.
- Production method of pig iron10 Feb 2026US 12,545,970 B2Kabushiki Kaisha Kobe Seiko Sho
- Optimization method for directional preparation technique and efficient use of semi-coke for blast furnace injection2 Dec 2025US 12,486,459 B2University of Science and Technology Beijing
- Hot metal temperature control method, hot metal temperature control device, hot metal temperature control system, and terminal device20 Aug 2026US 2026/0242883 A1Jfe Steel Corporation
- Process control method, blast furnace operation method, hot metal production method, process control device, and program30 Jul 2026US 2026/0218321 A1Jfe Steel Corporation
- Method for producing pig iron12 Feb 2026US 2026/0043098 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Utilization of bio-oil or biochar in a blast furnace29 Jan 2026US 2026/0028686 A1Charm Industrial, Inc.
- Gas Injection Control System For Blast Furnace, And Control Method27 Mar 2025US 2025/0101538 A1Xinjiang Bayi Iron & Steel Co., Ltd.
Most cited
By later US patents
- Coal-water slurry and method for its preparation67US 4,282,006 AAlfred University Research Foundation, Inc. · 1981
- Pulverized coal carriability improver62US 6,083,289 AKao Corporation · 2000
- Method of distributing and transporting powdered or granular material47US 4,529,336 ADenka Consultant & Engineering Co., Ltd. · 1985
- Apparatus for electric steelmaking43US 5,714,113 AAmerican Combustion, Inc. · 1998
- Apparatus and method for feeding pulverized hydrocarbonaceous solids into a high pressure reactor42US 4,451,184 AChevron Research Company · 1984