IP Library › Granted Patent US 12,655,487
Granted Patent B2
US 12,655,487 · App. 18/648,638 · Granted Jun 16, 2026

Carbon-negative metallurgical products

Inventors: James A. Mennell (Brighton, UT); Daren Daugaard (Newburg, MO); Dustin Slack (Gwinn, MI)
Assignee: Carbon Technology Holdings, LLC
C21B5/007C22B1/2406C22C38/00C21C5/00
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Quick Facts
Patent No.
US 12,655,487
App. No.
18/648,638
Granted
Jun 16, 2026
Kind
B2
Abstract

Some variations provide a carbon-negative carbon product that is characterized by a carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative carbon product, wherein the carbon-negative carbon product contains at least about 50 wt % carbon. In some embodiments, the carbon intensity is less than −500 kg CO 2 e per metric ton of the carbon-negative carbon product. Other variations provide a carbon-negative metal product (e.g., a steel product) that is characterized by a carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative metal product, wherein the metal product contains from 50 wt % to 100 wt % of one or more metals and optionally one or more alloying elements. In some embodiments, the carbon-negative metal product is characterized by a carbon intensity less than −200 kg CO 2 e per metric ton of the carbon-negative metal product. The carbon-negative metal product can contain a wide variety of metals.

Claims (10)

1 . A carbon-negative steel product that is characterized by a carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative steel product, wherein the carbon-negative steel product contains from about 50 wt % to about 99 wt % iron and from about 1 wt % to about 50 wt % of one or more alloying elements, wherein the one or more alloying elements are selected from Al, Bi, B, Ce, Cr, Cu, H, Mg, Mn, Mo, N, Nb, Ni, P, Pb, Si, Sn, S, Ta, Ti, W, V, Zr, Zn, or combinations thereof.

2 . The carbon-negative steel product of claim 1 , wherein the carbon intensity is less than about −100 kg CO 2 e per metric ton of the carbon-negative steel product.

3 . The carbon-negative steel product of claim 1 , wherein the carbon intensity is less than about −200 kg CO 2 e per metric ton of the carbon-negative steel product.

4 . The carbon-negative steel product of claim 1 , wherein the carbon intensity is less than about −300 kg CO 2 e per metric ton of the carbon-negative steel product.

5 . The carbon-negative steel product of claim 1 , wherein the carbon intensity is less than about −400 kg CO 2 e per metric ton of the carbon-negative steel product.

6 . The carbon-negative steel product of claim 1 , wherein the carbon-negative steel product contains from about 80 wt % to about 99 wt % iron.

7 . The carbon-negative steel product of claim 1 , wherein the carbon-negative steel product contains from about 90 wt % to about 99 wt % iron.

8 . The carbon-negative steel product of claim 1 , wherein the carbon-negative steel product contains from about 1 wt % to about 10 wt % of the one or more alloying elements.

9 . The carbon-negative steel product of claim 1 , wherein the one or more alloying elements include hydrogen, and wherein the hydrogen is optionally derived from a carbon-negative carbon product that is characterized by a carbon-product carbon intensity less than 0 kg CO 2 e per metric ton of the carbon-negative carbon product.

10 . The carbon-negative steel product of claim 1 , wherein the carbon-negative steel product is in a form selected from powder, pellets, sheets, rods, bars, wires, coils, pipes, plates, walls, tanks, cast structures, engineered structures, electromagnets, permanent magnets, or combinations thereof.

Assignments (2)
SECURITY INTEREST Recorded Feb 5, 2025
From: CARBON TECHNOLOGY HOLDINGS, LLC
To: ALTER DOMUS (US) LLC
Reel/Frame 070114/0775 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 29, 2024
From: MENNELL, JAMES A.; DAUGAARD, DAREN; SLACK, DUSTIN
To: CARBON TECHNOLOGY HOLDINGS, LLC
Reel/Frame 067250/0353 →
Continuity (4)
Division 18362470 · Jul 31, 2023
Continuation 17674022 · Feb 17, 2022
Provisional Application 63151026 · Feb 18, 2021
Related Publication 20240294997A1 · Sep 5, 2024
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