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SUMITOMO ELECTRIC HARDMETAL CORP.

SUMITOMO ELECTRIC HARDMETAL CORP. shows a surprising and strong emerging focus on Coating & Surface Treatment, which represents 18.2% of its portfolio and saw a significant 60.0% year-over-year growth in 2025, despite a sharp decline so far in 2026. Concurrently, the company appears to be shifting priorities away from Cement & Ceramics, which has seen a consistent decline, including a 50.0% drop in 2025, and Non-metallic Inorganic Compounds, which saw a 66.7% decline in 2025 and no patents so far in 2026.

Patent Trend by Technology Area

Yearly patent publications since 2023

Product themes

Product-level themes inferred from filings since 2023, with category chips showing where each theme appears. Select a theme to filter the patents below.

291 US filings (since 2023) · 5 categories · 9 themes

Metal Matrix Composites & Hard Materials

Composite materials where a metallic matrix is reinforced with a second phase (e.g., ceramic particles, carbon nanotubes, diamond grains) to significantly enhance properties like hardness, wear resistance, stiffness, or strength, often used in cutting tools, wear parts, or structural applications.

Alloys
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50since 2023
-52.9%YoY
Wear & Corrosion Resistant Coatings

Application of protective layers to improve the durability and longevity of components by enhancing resistance to wear, oxidation, or chemical degradation in demanding operational environments.

Coating & Surface Treatment
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46since 2023
+46.2%YoY
Alloy Coatings & Surface Treatment

Methods and compositions for applying metallic or alloy layers to a substrate, or modifying the surface of an alloy, to impart specific functional properties such as corrosion resistance, wear resistance, electrical insulation, or improved adhesion, without altering the bulk properties significantly.

Alloys
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41since 2023
+63.6%YoY
Ceramic Matrix Composite Manufacturing

Methods and processes for fabricating ceramic matrix composites (CMCs), including preform creation, infiltration techniques, and densification to form complex shapes with enhanced properties.

Cement & Ceramics
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18since 2023
+66.7%YoY
Functionally Graded Materials & Coatings

Production of materials where properties vary continuously or discontinuously through the volume, often achieved by combining different powders or applying specialized coatings like thermal sprays to enhance surface hardness, wear resistance, or thermal properties.

Powder Metallurgy
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14since 2023
0.0%YoY
Silicon-based Functional Materialsfiltered

Synthesis and processing of silicon and silicon carbide materials in various forms (e.g., particles, nanowires, films) for applications beyond traditional semiconductors, such as battery components, refractories, or advanced electronics.

Non-metallic Inorganic Compounds
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6since 2023
-50.0%YoY
Advanced Functional Ceramics

Ceramic materials and components engineered for specific functional applications, such as electronics, energy storage, wear resistance, or high-temperature heating elements.

Cement & Ceramics
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3since 2023
+100.0%YoY
Conformal & Selective Film Deposition

Methods for depositing thin films with controlled conformality, thickness, and material properties, including selective deposition on specific areas, often using atomic layer deposition (ALD), chemical vapor deposition (CVD), or epitaxial growth.

Coating & Surface Treatment
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2since 2023
0.0%YoY
Advanced Magnetic Powder Materials

Development and processing of metal powders with specific magnetic properties, including soft magnetic alloys, permanent magnet materials, and insulated powders for electronic components, often involving precise control of particle size, morphology, and composition.

AlloysPowder Metallurgy
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2since 2023
new

Patents

Showing 1-10 of 10

Silicon-based Functional Materials
Page 1 of 1
US 12404570 B2GRANTED
C22C26/00

Diamond sintered material and tool including diamond sintered material

Filed:2020-10-22Pub:2025-09-02
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

A diamond sintered material includes diamond grains, wherein a content ratio of the diamond grains is more than or equal to 80 volume % and less than or equal to 99 volume % with respect to the diamond sintered material, an average grain size of the diamond grains is more than or equal to 0.1 μm and less than or equal to 50 μm, and a dislocation density of the diamond grains is more than or equal to 1.2×10 16 m −2 and less than or equal to 5.4×10 19 m −2 .

US 20240262693 A1APPLICATION
C01B32/25

DIAMOND POLYCRYSTAL BODY, AND TOOL PROVIDED WITH DIAMOND POLYCRYSTAL BODY

Filed:2021-06-11Pub:2024-08-08
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

A polycrystalline diamond comprising diamond particles, wherein: the content of the diamond particles is more than 99% by volume based on the total volume of the polycrystalline diamond: the median diameter d50 of the diamond particles is 10 nm or more and 200 nm or less; and the dislocation density of the diamond particles is 0.1×10 15 m −2 or more and less than 2.0×10 15 m −2 .

US 20240199430 A1APPLICATION
C01B32/25

DIAMOND POLYCRYSTALLINE BODY, AND TOOL COMPRISING DIAMOND POLYCRYSTALLINE BODY

Filed:2021-06-11Pub:2024-06-20
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

A polycrystalline diamond comprising diamond particles, wherein: the content of the diamond particles is more than 99% by volume based on the total volume of the polycrystalline diamond; the median diameter d50 of the diamond particles is 10 nm or more and 200 nm or less; and the dislocation density of the diamond particles is 2.0×10 15 m −2 or more and 4.0×10 16 m −2 or less.

US 11845658 B2GRANTED
C01B21/064

Polycrystalline cubic boron nitride and heatsink using the same

Filed:2021-08-02Pub:2023-12-19
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

A polycrystalline cubic boron nitride comprising 99.5% by volume or more of cubic boron nitride, wherein the polycrystalline cubic boron nitride has a heat conductivity of 300 W/mK or more, the polycrystalline cubic boron nitride has a carbon content of 100 ppm or more and 1000 ppm or less in terms of mass, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of 0.9 μm or more and 10 μm or less.

US 20230203624 A1APPLICATION
C22C26/00

DIAMOND SINTERED MATERIAL AND TOOL INCLUDING DIAMOND SINTERED MATERIAL

Filed:2020-10-22Pub:2023-06-29
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

A diamond sintered material includes diamond grains, wherein a content ratio of the diamond grains is more than or equal to 80 volume % and less than or equal to 99 volume % with respect to the diamond sintered material, an average grain size of the diamond grains is more than or equal to 0.1 μm and less than or equal to 50 μm, and a dislocation density of the diamond grains is more than or equal to 1.2×10 16 m −2 and less than or equal to 5.4×10 19 m −2 .

US 20230138294 A1APPLICATION
C01B21/064

POLYCRYSTALLINE CUBIC BORON NITRIDE AND HEATSINK USING THE SAME

Filed:2021-08-02Pub:2023-05-04
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

A polycrystalline cubic boron nitride comprising 99.5% by volume or more of cubic boron nitride, wherein the polycrystalline cubic boron nitride has a heat conductivity of 300 W/mK or more, the polycrystalline cubic boron nitride has a carbon content of 100 ppm or more and 1000 ppm or less in terms of mass, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of 0.9 μm or more and 10 μm or less.

US 20220041446 A1APPLICATION
C01B21/064

POLYCRYSTALLINE CUBIC BORON NITRIDE AND METHOD FOR MANUFACTURING THE SAME

Filed:2019-09-04Pub:2022-02-10
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

There is provided a polycrystalline cubic boron nitride containing a cubic boron nitride at a content greater than or equal to 98.5% by volume, the polycrystalline cubic boron nitride having a dislocation density less than or equal to 8×10 15 /m 2 .

US 11186485 B2GRANTED
H01M4/02

Polycrystalline cubic boron nitride and method for manufacturing the same

Filed:2020-02-27Pub:2021-11-30
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

A polycrystalline cubic boron nitride comprising 96% by volume or more of cubic boron nitride, wherein the cubic boron nitride has a dislocation density of 8×10 15 /m 2 or less, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of less than 100 nm.

US 11046581 B2GRANTED
C04B35/5831

Polycrystalline cubic boron nitride and method for manufacturing the same

Filed:2019-06-18Pub:2021-06-29
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

The polycrystalline cubic boron nitride contains a cubic boron nitride at a content greater than or equal to 98.5% by volume, and has an area rate S1 of crystal grains, the crystal grains having an equivalent circle diameter greater than or equal to 1 μm, less than or equal to 20 area % at a cross section of the polycrystalline cubic boron nitride as observed with a scanning electron microscope at a magnification of 10,000.

US 20210087058 A1APPLICATION
C01B21/064

POLYCRYSTALLINE CUBIC BORON NITRIDE AND METHOD FOR MANUFACTURING THE SAME

Filed:2020-02-27Pub:2021-03-25
Applicant:SUMITOMO ELECTRIC HARDMETAL CORP.

A polycrystalline cubic boron nitride comprising 96% by volume or more of cubic boron nitride, wherein the cubic boron nitride has a dislocation density of 8×10 15 /m 2 or less, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of less than 100 nm.

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