IP Library › Granted Patent US 12,398,435
Granted Patent B2
US 12,398,435 · App. 18/362,470 · Granted Aug 26, 2025

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 12,398,435
App. No.
18/362,470
Granted
Aug 26, 2025
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 (11)

1. A carbon-negative metal 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 carbon-negative metal product comprises from at least about 50 wt % to at most about 100 wt % of a metal and an alloying element;

wherein the alloying element comprises hydrogen.

2. The carbon-negative metal product of claim 1 , wherein the hydrogen is 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.

3. The carbon-negative metal product of claim 1 , wherein the alloying element comprises nitrogen.

4. The carbon-negative metal product of claim 3 , wherein the nitrogen is 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.

5. The carbon-negative metal product of claim 1 , wherein the alloying element comprises oxygen.

6. The carbon-negative metal product of claim 5 , wherein the oxygen is 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.

7. The carbon-negative metal product of claim 1 , wherein the alloying element comprises sulfur.

8. The carbon-negative metal product of claim 7 , wherein the sulfur is 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.

9. The carbon-negative metal product of claim 1 , wherein the alloying element comprises phosphorus.

10. The carbon-negative metal product of claim 9 , wherein the phosphorus is 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.

Assignments (4)
SECURITY INTEREST Recorded Feb 5, 2025
From: CARBON TECHNOLOGY HOLDINGS, LLC
To: ALTER DOMUS (US) LLC
Reel/Frame 070114/0775 →
RELEASE OF SECURITY INTEREST Recorded Feb 4, 2025
From: FORTRESS CREDIT CORP.
To: CARBON TECHNOLOGY HOLDINGS, LLC
Reel/Frame 070608/0239 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 23, 2024
From: MENNELL, JAMES A.; DAUGAARD, DAREN; SLACK, DUSTIN
To: CARBON TECHNOLOGY HOLDINGS, LLC
Reel/Frame 067198/0096 →
SECURITY INTEREST Recorded Feb 12, 2024
From: CARBON TECHNOLOGY HOLDINGS, LLC
To: FORTRESS CREDIT CORP.
Reel/Frame 066552/0001 →
Continuity (3)
Continuation 17674022 · Feb 17, 2022
Provisional Application 63151026 · Feb 18, 2021
Related Publication 20230407421A1 · Dec 21, 2023
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