Midrex Technologies, Inc.
2 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 2 name spellings.
3
Ending by 2030
Jan 2028
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 1 fee due Feb 6, 2027The maintenance fee for Methods for mitigating the buildup of direct reduced iron clusters on the walls of a direct reduction furnace (US 10,370,732) comes due Feb 6, 2027. Unpaid by Aug 6, 2027, it lapses early.
- 1 fee due Mar 8, 2027The maintenance fee for System and method for reducing iron oxide to metallic iron using natural gas (US 9,127,326) comes due Mar 8, 2027. Unpaid by Sep 8, 2027, it lapses early.
- 2 fees due Apr 10 to 17, 2027 · next Apr 10
- 1 fee due May 3, 2027The maintenance fee for Devices and methods for enhancing burden uniformity in a combination reforming/reducing shaft furnace (US 9,175,910) comes due May 3, 2027. Unpaid by Nov 3, 2027, it lapses early.
- 1 fee due Jun 17, 2027The maintenance fee for Methods and systems for increasing the carbon content of sponge iron in a reduction furnace (US 10,508,314) comes due Jun 17, 2027. Unpaid by Dec 17, 2027, it lapses early.
- 2 fees due Sep 5 to 30, 2027 · next Sep 5
- 2 fees due Oct 9 to 23, 2027 · next Oct 9
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,678,176 | Method and apparatus for charging hot direct reduced iron from hot transport vessels into a melter or finisher In force · From the USPTO record | In force | From the USPTO record | |
| US 7,938,882 | Method and system for the supply of hot direct reduced iron for multiple uses In force · From the USPTO record | In force | From the USPTO record | |
| US 8,771,638 | Method and apparatus for sequestering carbon dioxide from a spent gas In force · From the USPTO record | In force | From the USPTO record | |
| US 9,127,326 | System and method for reducing iron oxide to metallic iron using natural gas In force · From the USPTO record | In force | From the USPTO record | |
| US 9,028,585 | System and Method for Reducing Iron Oxide to Metallic Iron Using Coke Oven Gas and Oxygen Steelmaking Furnace Gas In force · Low confidence | In force | Low confidence | |
| US 8,496,730 | System and method for reducing iron oxide to metallic iron using coke oven gas and oxygen steelmaking furnace gas In force · From the USPTO record | In force | From the USPTO record | |
| US 8,709,131 | Method and system for the production of direct reduced iron using a synthesis gas with a high carbon monoxide content In force · From the USPTO record | In force | From the USPTO record | |
| US 8,871,000 | Electric furnace for producing molten metal having material recycling capability In force · From the USPTO record | In force | From the USPTO record | |
| US 8,999,033 | Method and system for producing direct reduced iron and/or hot metal using brown coal In force · From the USPTO record | In force | From the USPTO record | |
| US 9,175,910 | Devices and methods for enhancing burden uniformity in a combination reforming/reducing shaft furnace In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 36: 2 patents in force now held by others · 6 lapsed for an unpaid fee · 13 ended at full term. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
6 pending · 1 abandoned