C21B 13/0053
On a massing grate
Official title: {On a massing grate}
C21B13/0053 (On a massing grate) appears on 15 US grants and 19 published applications in this corpus.
Search patents in C21B- Granted patents
- 15
- Published applications
- 19
- Assignees
- 21
- Inventors
- 74
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 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 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 2 |
| 2015 | 2 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 0 | 1 |
| 2019 | 2 | 2 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 2 |
| 2024 | 0 | 4 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process and system for the production of iron nuggets12 May 2026US 12,624,406 B2Carbontec Energy Corporation
- Method for producing sintered ore2 Sep 2025US 12,404,566 B2Jfe Steel Corporation
- Cooperative emission reduction method for sintering using energy-carrying composite gas medium14 Jan 2025US 12,195,822 B2Central South University
- Method for smelting oxide ore25 Oct 2022US 11,479,832 B2Sumitomo Metal Mining Co., Ltd.
- Reduced iron manufacturing method16 Jun 2020US 10,683,562 B2Kobe Steel, Ltd.
- A metal agglomerate production configuration22 Aug 2024US 2024/0279766 A1Luossavaara-Kiirunavaara AB
- Pre-reduced pellet preparation apparatus and method based on grate-rotary kiln22 Aug 2024US 2024/0279767 A1Baoshan Iron & Steel Co., Ltd.
- ZigZag Flow Reactor for Heterogenous Thermochemical Reduction8 Aug 2024US 2024/0261858 A1Arizona Board of Regents on behalf of Arizona State University
- Process and system for the production of iron nuggets6 Jun 2024US 2024/0182993 A1Carbontec Energy Corporation
- Biomass direct reduced iron21 Dec 2023US 2023/0407423 A1Technological Resources Pty. Limited
Most cited
By later US patents
- Method of reducing iron oxide on a movable hearth furnace6US 6,248,152 B1Kawasaki Steel Corporation · 2001
- Method of continuous reduction of iron oxides3US 4,300,948 AArbed S.A. · 1981
- Reduced iron manufacturing method2US 10,683,562 B2Kobe Steel, Ltd. · 2020
- Process for the direct reduction of minerals on a continuous grate2US 4,023,963 ACreusot-Loire Entreprises · 1977
- Feeding system for reduced iron material2US 8,915,352 B2Kobe Steel, Ltd. · 2014