KOPPERS HOLDINGS INC. Active Patents
28 granted patents the USPTO still lists as patented, newest filing first, as the USPTO Open Data Portal records them; the company is the first-named applicant. The application number opens the full record at Patent Center.
- 2025-11-19: Application 19394355; Invention WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROM; Applicant KOPPERS PERFORMANCE CHEMICALS, INC.; Status Patented Case.
- 2025-08-08: Application 19294981; Invention WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROM; Applicant KOPPERS PERFORMANCE CHEMICALS, INC.; Status Patented Case.
- 2025-03-06: Application 19072608; Invention WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROM; Applicant KOPPERS PERFORMANCE CHEMICALS, INC.; Status Patented Case.
- 2023-11-30: Application 18524067; Invention WOOD PRESERVATIVE AND METHOD FOR PRODUCING SAME; Applicant Koppers Performance Chemicals Inc.; Status Patented Case.
| Filed | Application | Invention | Applicant | Status | Granted | Patent | Published as | Inventor name | Inventor country | Examiner |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-11-19 | 19394355 | WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROM | KOPPERS PERFORMANCE CHEMICALS, INC. | Patented Case | 2026-05-26 | 12636810 | US20260070256A1 | Min Kuang Jun Zhang | United States United States | GREEN, ANTHONY J |
| 2025-08-08 | 19294981 | WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROM | KOPPERS PERFORMANCE CHEMICALS, INC. | Patented Case | 2025-12-09 | 12491658 | US20250375917A1 | Min Kuang Jun Zhang | United States United States | GREEN, ANTHONY J |
| 2025-03-06 | 19072608 | WOOD PRESERVATIVE COMPOSITION COMPRISING 4,5-DICHLORO-2-OCTYLISOTHIAZOL-3(2H)-ONE, A METHOD TREATING A WOOD SUBSTRATE THEREWITH, AND A WOOD PRODUCT PRODUCED THEREFROM | KOPPERS PERFORMANCE CHEMICALS, INC. | Patented Case | 2025-07-29 | 12370716 | US20250196393A1 | Min Kuang Jun Zhang | United States United States | GUINO-O UZZLE, MARITES A |
| 2023-11-30 | 18524067 | WOOD PRESERVATIVE AND METHOD FOR PRODUCING SAME | Koppers Performance Chemicals Inc. | Patented Case | 2025-04-22 | 12279615 | US20240099303A1 | Jun Zhang Peter Tham John Horton | United States United States United States | WALSHON, SCOTT R |
| 2022-09-08 | 17940725 | Dispersion of Coal Tar Pitch for Coating Graphitic Materials and Use in Li-Ion Battery Electrode Production | Koppers Delaware, Inc. | Patented Case | 2025-08-19 | 12394787 | US20230080961A1 | Stacey McKinney Jun Zhang Billy Jay Cairns Peter Tham Carl Camille Mueller Kevin J. Costanzo Brian R. Jones Daniel P. Gray | United States United States United States United States United States United States United Kingdom United States | OYER, ANDREW J |
| 2022-06-30 | 17854196 | METHOD FOR PRODUCING COPPER CARBOXYLATE, A WOOD PRESERVATIVE COMPOSITION COMPRISING COPPER CARBOXYLATE, AND A WOOD PRODUCT PRODUCED THEREFROM | Koppers Performance Chemicals, Inc. | Patented Case | 2024-04-09 | 11951649 | US20220332008A1 | Md Sayful Islam Jun Zhang | United States United States | BUTCHER, ROBERT T |
| 2021-12-17 | 17554366 | Heat Treatment Process for Increased Pitch Yields | Koppers Delaware, Inc. | Patented Case | 2023-04-11 | 11624029 | US20220177784A1 | Michael Bech Malmqvist Billy Jay Cairns Carl Camille Mueller John Thomas Baron James T. Dietz | Denmark United States United States United States United States | NGUYEN, TAM M |
| 2021-09-20 | 17479503 | WOOD PRESERVATIVE AND METHOD FOR PRODUCING SAME | Koppers Performance Chemicals Inc. | Patented Case | 2024-01-30 | 11882833 | US20220000115A1 | Jun Zhang Peter Tham John Horton | United States United States United States | WALSHON, SCOTT R |
| 2021-08-26 | 17300591 | Method and Apparatus for Continuous Production of Mesophase Pitch | Koppers Delaware, Inc. | Patented Case | 2024-02-13 | 11898101 | US20230062059A1 | James T. Dietz | United States | DOYLE, BRANDI M |
| 2021-01-19 | 17151925 | Gauge Plate Insulator | Koppers Delaware, Inc. | Patented Case | 2024-07-16 | 12037750 | US20210148058A1 | Steven D. Singleton William Thomas Urmson JR. John W. Mospan Ronald K. Junk | United States United States United States United States | MCCARRY JR, ROBERT J |
| 2019-07-23 | 16520135 | Heat Treatment Process and System for Increased Pitch Yields | Koppers Delaware, Inc. | Patented Case | 2022-02-15 | 11248172 | US20210024830A1 | Michael Bech Malmqvist Billy Jay Cairns Carl Camille Mueller John Thomas Baron James T. Dietz | Denmark United States United States United States United States | NGUYEN, TAM M |
| 2019-01-30 | 16322060 | STABLE WOOD PRESERVATIVE FORMULATIONS | Koppers Performance Chemicals Inc. | Patented Case | 2021-11-16 | 11173626 | US20190184597A1 | Jun Zhang Peter Tham | United States United States | MAEWALL, SNIGDHA |
| 2018-12-11 | 16216486 | WOOD PRESERVATIVE AND METHOD FOR PRODUCING SAME | Koppers Performance Chemicals Inc. | Patented Case | 2021-10-12 | 11140901 | US20190246641A1 | Jun Zhang Peter Tham John Horton | United States United States United States | GOLDEN, CHINESSA T |
| 2018-10-25 | 16170676 | WOOD TREATMENT FOR DIMENSIONAL STABILIZATION | Koppers Performance Chemicals Inc. | Patented Case | 2019-10-15 | 10442110 | US20190126506A1 | Jun Zhang Xinhao H. Gao John Horton Richard Ziobro | United States United States United States | KILIMAN, LESZEK B |
| 2018-08-28 | 16114675 | METHOD OF PREPARING COPPER-CONTAINING WOOD PRESERVING COMPOSITIONS | Koppers Performance Chemicals Inc. | Patented Case | 2021-08-31 | 11102980 | US20190090493A1 | Jun Zhang Peter Tham | United States United States | QIAN, YUN |
| 2018-08-14 | 16103387 | WOOD PIGMENT COMPOSITIONS AND WOOD TREATMENT PROCESSES | Koppers Performance Chemicals Inc. | Patented Case | 2021-07-27 | 11072086 | US20190099913A1 | Md Sayful Islam Jun Zhang | United States United States | ELHILO, EISA B |
| 2018-04-27 | 15965410 | SPRAY-ON EXTERIOR COATING COMPOSITIONS FOR WOOD TREATMENT | Koppers Performance Chemicals Inc. | Patented Case | 2021-08-17 | 11091654 | US20190092949A1 | Min Kuang Jun Zhang | United States United States | LEONG, NATHAN T |
| 2017-05-16 | 29604230 | Anti-Rail Rollover Device | Koppers Delaware, Inc. | Patented Case | 2020-06-02 | D885977 | Steven D. Singleton Donald A. Bielski Ronald K. Junk John W. Mospan | United States United States United States United States | AMAN, ANNA KATHY | |
| 2017-05-11 | 15592792 | Center Supported Bond Joint | Koppers Delaware, Inc. | Patented Case | 2021-06-22 | 11041274 | US20180119362A1 | W. Thomas Urmson JR. John W. Mospan John M. Downey Patrick J. Boario Richard Jarosinski | United States United States United States United States United States | LE, MARK T |
| 2017-01-19 | 15327534 | WOOD TREATMENT FOR DIMENSIONAL STABILIZATION | KOPPERS PERFORMANCE CHEMICALS INC. | Patented Case | 2018-11-27 | 10137595 | US20170197329A1 | Jun ZHANG Xinhao Howard Gao John Horton Richard (deceased) Ziobro | United States United States United States | KILIMAN, LESZEK B |
| 2016-11-29 | 15314791 | METHODS OF CONFERRING FIRE RETARDANCY TO WOOD AND FIRE-RETARDANT WOOD PRODUCTS | Koppers Performance Chemicals Inc. | Patented Case | 2019-12-10 | 10500756 | US20170120473A1 | Jun ZHANG John HORTON Xinhao H. GAO | United States United States United States | FLETCHER III, WILLIAM P |
| 2016-01-14 | 14995624 | COMPOSITIONS AND METHODS FOR TREATING CELLULOSE-BASED MATERIALS WITH MICRONIZED ADDITIVES | Koppers Performance Chemicals Inc. | Patented Case | 2018-04-10 | 9937634 | US20160325458A1 | Robert M. Leach Jun Zhang | United States United States | ANTHONY, JOSEPH DAVID |
| 2015-01-29 | 14608800 | COMPOSITIONS AND METHODS FOR TREATING CELLULOSE-BASED MATERIALS WITH MICRONIZED ADDITIVES | Koppers Performance Chemicals Inc. | Patented Case | 2016-02-23 | 9266251 | US20150140326A1 | Robert M. Leach Jun Zhang | United States United States | ANTHONY, JOSEPH DAVID |
| 2014-07-10 | 14328075 | METHODS OF CONFERRING FIRE RETARDANCY TO WOOD AND FIRE-RETARDANT WOOD PRODUCTS | Koppers Performance Chemicals Inc. | Patented Case | 2017-06-06 | 9669564 | US20150352744A1 | Jun Zhang John Horton Xinhao Howard Gao | United States United States United States | KILIMAN, LESZEK B |
| 2014-04-28 | 14263568 | MICRONIZED WOOD PRESERVATIVE FORMULATIONS | Koppers Performance Chemicals Inc. | Patented Case | 2015-07-14 | 9079328 | US20140234648A1 | Robert M. Leach Jun Zhang | United States United States | BROWN, COURTNEY A |
| 2014-03-26 | 14226484 | PARTICULATE WOOD PRESERVATIVE AND METHOD FOR PRODUCING SAME | Koppers Performance Chemicals Inc. | Patented Case | 2016-04-19 | 9314030 | US20150056258A1 | H. Wayne Richardson Robert L. Hodge | United States United States | FLETCHER III, WILLIAM P |
| 2013-11-01 | 14069651 | COMPOSITIONS AND METHODS FOR TREATING CELLULOSE-BASED MATERIALS WITH MICRONIZED ADDITIVES | Koppers Performance Chemicals Inc. | Patented Case | 2015-03-10 | 8974854 | US20140193634A1 | Robert M. Leach Jun Zhang | United States United States | ANTHONY, JOSEPH DAVID |
| 2013-04-12 | 13861648 | Method Of Delivering Compositions To Substrates | Koppers Performance Chemicals Inc. | Patented Case | 2015-05-05 | 9023428 | US20130230668A1 | Nigel Paul Maynard | New Zealand | LEONG, NATHAN T |
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