Company Analysis
Sign in

Cleveland-Cliffs Inc. (CLF)

NYSE: CLF · Metal Mining · Cleveland, OH · filing with the SEC since 1994
Full chart Alerts Compare
Grade5.3
◀ Past 7.5● Present 4.7▶ Future 2.5
OverviewBusinessFinancialsGradeForecastSentimentOwnershipPeopleFilingsPatents Chart

Patents

US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026

55 patents granted to the 5 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to Cleveland-Cliffs Inc.’s names, not what it holds today.

Patents granted
55
55 utility, 1976 to Dec 31, 2025
Granted in 2025
1
Against 8 in 2024 and 2 in 2023
Applications published
23
3 of them in 2025
Names they are printed under
5
a subsidiary, a former name
By yearGrantedApplications published
'98'99'00'01'02'03'04'09'12'13'21'22'23'24'25
Each pair is one calendar year. Applications are published about eighteen months after filing, so the newest years read low.
What they are aboutgrants since 2021
Materials, metallurgy8
Surface technology, coating7
Machine tools4
Mechanical elements1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name5 counted
Stelco Inc. a subsidiary
CA, as the owner printed on each patent. 1 more under the same name are not counted (printed in US)
32 granted
3 published
Cleveland-Cliffs Steel Properties Inc. a subsidiary
US, as the owner printed on each patent
20 granted
0 published
Cleveland-Cliffs Steel Properties Inc. a subsidiary
named as the applicant on its applications, in US
0 granted
19 published
Cleveland Cliffs Iron Company a subsidiary
US, as the owner printed on each patent
2 granted
0 published
Cliffs Natural Resources Inc. a former name
US, as the owner printed on each patent
1 granted
1 published
Newest grantseach row opens the USPTO’s own copy
GrantedPatentTitleFieldOwner as printed
Aug 12, 202512,385,120Slurry-blasted hot-roll-based hot dip aluminized steel stripSurface technology, coatingCleveland-Cliffs Steel Properties Inc.
Nov 19, 202412,145,221Shielding and cooling a continuous weld between steel sheets/plates using a non-oxidizing atmosphere to reduce the formation of oxide on a surface of the continuous weldMachine toolsCleveland-Cliffs Steel Properties Inc.
Jul 23, 202412,042,850Detection and removal of continuous caster-related defects on slabsMaterials, metallurgyCleveland-Cliffs Steel Properties Inc.
Apr 16, 202411,958,107Tundish funnelMaterials, metallurgyCleveland-Cliffs Steel Properties Inc.
Mar 26, 202411,942,247Grain oriented electrical steel with improved forsterite coating characteristicsMaterials, metallurgyCleveland-Cliffs Steel Properties Inc.
Mar 26, 202411,939,656Snout for use in a hot dip coating lineSurface technology, coatingCleveland-Cliffs Steel Properties Inc.
Feb 27, 202411,913,099Press hardened steel with extremely high strength and method for productionMaterials, metallurgyCleveland-Cliffs Steel Properties Inc.
Feb 13, 202411,898,251Snout for use in a hot dip coating lineSurface technology, coatingCleveland-Cliffs Steel Properties Inc.
Jan 2, 202411,858,059Weld wheel cleaning systemMachine toolsCleveland-Cliffs Steel Properties Inc.
May 30, 202311,660,699Joining of Al-Si coated press hardened steel using flash butt weldingMachine toolsCleveland-Cliffs Steel Properties Inc.
Newest applications publishedan application is a clue, never a plan
PublishedApplicationTitleFieldOwner as printed
Oct 30, 20252025/0333830SLURRY-BLASTED HOT-ROLL-BASED HOT DIP ALUMINIZED STEEL STRIPSurface technology, coatingCleveland-Cliffs Steel Properties Inc.
Apr 10, 20252025/0115983RESISTANCE OF STAINLESS STEEL TO LIQUID ALUMINUM ATTACKMaterials, metallurgyCleveland-Cliffs Steel Properties Inc.
Feb 6, 20252025/0042478STEEL TUBE AS REINFORCEMENT FOR VEHICLE STRUCTURETransportCleveland-Cliffs Steel Properties Inc.
Nov 28, 20242024/0391330STEEL TAILOR WELDED BLANK STAMPED BATTERY TRAYElectrical machinery, apparatus, energyCleveland-Cliffs Steel Properties Inc.
Nov 21, 20242024/0383534STEEL TUBE AS REINFORCEMENT FOR VEHICLE STRUCTURETransportCleveland-Cliffs Steel Properties Inc.
Nov 7, 20242024/0367222Detection and Removal of Continuous Caster-Related Defects on SlabsMaterials, metallurgyCleveland-Cliffs Steel Properties Inc.
Oct 24, 20242024/0352552STEEL SHEET AND METHOD OF PRODUCING SAMEMaterials, metallurgyCleveland-Cliffs Steel Properties Inc.
Sep 19, 20242024/0309483HIGH STRENGTH GALVANIZED AND GALVANNEALED STEEL SHEETS AND MANUFACTURING METHODMaterials, metallurgyCleveland-Cliffs Steel Properties Inc.
Sep 5, 20242024/0295004FURNACE HUMIDIFICATION SYSTEMThermal processes and apparatusCleveland-Cliffs Steel Properties Inc.
Jul 25, 20242024/0247358GAS ASSISTED SNOUT INTERFACE REMOVALSurface technology, coatingCleveland-Cliffs Steel Properties Inc.
What it applied for, 2024 to 2025: Materials, metallurgy 4 · Thermal processes and apparatus 2 · Surface technology, coating 2 · Transport 2 · Machine tools 1 · Electrical machinery, apparatus, energy 1.

A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.

SI Assistanton CLF · research, not advice