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Koppers Holdings, Inc. (KOP)

NYSE: KOP · Lumber & Wood Products (No Furniture) · Pittsburgh, PA · filing with the SEC since 2005
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Patents

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

339 patents granted to the 6 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 Koppers Holdings, Inc.’s names, not what it holds today.

Patents granted
339
335 utility, 3 reissue, 1 design, 1976 to Dec 31, 2025
Granted in 2025
4
Against 4 in 2024 and 1 in 2023
Applications published
55
5 of them in 2025
Names they are printed under
6
a subsidiary
By yearGrantedApplications published
'08'11'12'14'15'16'17'18'19'20'21'22'23'24'25
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
Basic materials chemistry8
Machine tools4
Civil engineering3
Chemical engineering1
Electrical machinery, apparatus, energy1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name6 counted
KOPPERS, INC. a subsidiary
US, as the owner printed on each patent
300 granted
1 published
Koppers Performance Chemicals Inc. a subsidiary
named as the applicant on its applications, in US
0 granted
37 published
KOPPERS DELAWARE, INC. a subsidiary
US, as the owner printed on each patent
17 granted
8 published
KOPPERS PERFORMANCE CHEMICALS, INC. a subsidiary
US, as the owner printed on each patent
21 granted
1 published
Koppers Delaware, Inc. a subsidiary
named as the applicant on its applications, in US
0 granted
8 published
Koppers Australia Pty. Limited a subsidiary
AU, as the owner printed on each patent
1 granted
0 published
Newest grantseach row opens the USPTO’s own copy
GrantedPatentTitleFieldOwner as printed
Dec 9, 202512,491,658Wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method treating a wood substrate therewith, and a wood product produced therefromBasic materials chemistryKOPPERS PERFORMANCE CHEMICALS, INC.
Aug 19, 202512,394,787Dispersion of coal tar pitch for coating graphitic materials and use in Li-ion battery electrode productionElectrical machinery, apparatus, energyKOPPERS DELAWARE, INC.
Jul 29, 202512,370,716Wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method treating a wood substrate therewith, and a wood product produced therefromBasic materials chemistryKOPPERS PERFORMANCE CHEMICALS, INC.
Apr 22, 202512,279,615Wood preservative and method for producing sameMachine toolsKOPPERS PERFORMANCE CHEMICALS, INC.
Jul 16, 202412,037,750Gauge plate insulatorCivil engineeringKOPPERS DELAWARE, INC.
Apr 9, 202411,951,649Method for producing copper carboxylate, a wood preservative composition comprising copper carboxylate, and a wood product produced therefromBasic materials chemistryKOPPERS PERFORMANCE CHEMICALS, INC.
Feb 13, 202411,898,101Method and apparatus for continuous production of mesophase pitchChemical engineeringKOPPERS DELAWARE, INC.
Jan 30, 202411,882,833Wood preservative and method for producing sameMachine toolsKOPPERS PERFORMANCE CHEMICALS, INC.
Apr 11, 202311,624,029Heat treatment process for increased pitch yieldsBasic materials chemistryKOPPERS DELAWARE, INC.
Feb 15, 202211,248,172Heat treatment process and system for increased pitch yieldsBasic materials chemistryKOPPERS DELAWARE, INC.
Newest applications publishedan application is a clue, never a plan
PublishedApplicationTitleFieldOwner as printed
Dec 11, 20252025/0375917WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROMBasic materials chemistryKoppers Performance Chemicals Inc. · patent 12,491,658 granted from it
Jun 19, 20252025/0196393WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROMBasic materials chemistryKoppers Performance Chemicals Inc. · patent 12,370,716 granted from it
Mar 20, 20252025/0092315HEAT TREATMENT PRODUCT BY PROCESS FOR INCREASED PITCH YIELDSBasic materials chemistryKoppers Delaware, Inc.
Feb 13, 20252025/0052736METHODS FOR DETERMINING A SOURCE OF WOOD PRODUCTS, WOOD PRESERVATIVE COMPOSITIONS, WOOD PRODUCTS, AND METHODS OF TREATING WOOD SUBSTRATESMeasurementKoppers Performance Chemicals Inc.
Jan 2, 20252025/0006901DISPERSION OF COAL TAR PITCH FOR COATING GRAPHITIC MATERIALS AND USE IN ELECTRODE PRODUCTIONElectrical machinery, apparatus, energyKoppers Delaware, Inc.
Oct 31, 20242024/0360364METHOD FOR MANUFACTURING AN AQUEOUS FIRE RETARDANT COMPOSITION, AN AQUEOUS FIRE RETARDANT COMPOSITION, A METHOD FOR TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROMBasic materials chemistryKoppers Performance Chemicals Inc.
Oct 17, 20242024/0342947A WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROMBasic materials chemistryKoppers Performance Chemicals Inc.
Oct 17, 20242024/0342946A WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROMBasic materials chemistryKoppers Performance Chemicals Inc.
Aug 22, 20242024/0278455METHOD FOR PRODUCING COPPER CARBOXYLATE, A WOOD PRESERVATIVE COMPOSITION COMPRISING COPPER CARBOXYLATE, AND A WOOD PRODUCT PRODUCED THEREFROMBasic materials chemistryKoppers Performance Chemicals Inc.
May 23, 20242024/0167231Rail Brace AssemblyCivil engineeringKoppers Delaware, Inc.
What it applied for, 2024 to 2025: Basic materials chemistry 7 · Machine tools 1 · Civil engineering 1 · Electrical machinery, apparatus, energy 1 · Measurement 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 KOP · research, not advice