Description
Class C21B : MANUFACTURE OF IRON OR STEEL
Subclass 7/18: Blast furnaces (lifts associated with blast furnaces B66B 9/06) Bell-and-hopper arrangements
C21B 7/18
Sub-Class
Stats
- 7 US PATENTS IN FORCE
- 3 US APPLICATIONS PENDING
- 2 Total Patent Owners
- 50 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11940215 | Blast furnace apparatus and operation method for blast furnace | Mar 25, 19 | Mar 26, 24 | JFE Steel Corporation |
| 11199359 | Sealing valve arrangement for a shaft furnace charging installation | Nov 08, 17 | Dec 14, 21 | Paul Wurth SA |
| 9926614 | Device for immobilizing the chute on the ends of journals in an apparatus for loading a shaft furnace | Jul 02, 15 | Mar 27, 18 | Paul Wurth SA |
| 9039342 | Crucible shuttle assembly and method of operation | Sep 12, 12 | May 26, 15 | LECO CORPORATION |
| 8512439 | Method for feeding a burden to a blast furnace | Apr 22, 10 | Aug 20, 13 | PAUL WURTH S.A. |
| 8021603 | Rotary charging device for a shaft furnace equipped with a cooling system | Oct 03, 06 | Sep 20, 11 | PAUL WURTH S.A. |
| 5411242 | Charging device with member for regulating the flow rate | Mar 03, 94 | May 02, 95 | PAUL WURTH S.A. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0077,255 | METHOD FOR OPERATING A BLAST FURNACE PLANT | Jan 20, 22 | Mar 07, 24 | Not available |
| 2022/0325,367 | SKIP HOIST OF A BLAST FURNACE | Sep 07, 20 | Oct 13, 22 | Not available |
| 2021/0041,172 | BLAST FURNACE APPARATUS AND OPERATION METHOD FOR BLAST FURNACE | Mar 25, 19 | Feb 11, 21 | JFE Steel Corporation |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 35 Months (last 2 years Issuances)
- 35 Months (last 5 years Issuances)