C10C 1/04
Working-up tar: by distillation
Official title: by distillation
C10C1/04 (Working-up tar: by distillation) appears on 37 US grants and 37 published applications in this corpus.
Search patents in C10C- Granted patents
- 37
- Published applications
- 37
- Assignees
- 29
- Inventors
- 109
- Latest grant
- 20 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 1 |
| 2003 | 0 | 3 |
| 2004 | 0 | 3 |
| 2005 | 0 | 2 |
| 2006 | 2 | 1 |
| 2007 | 1 | 0 |
| 2008 | 2 | 2 |
| 2009 | 2 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 2 | 1 |
| 2014 | 1 | 1 |
| 2015 | 2 | 5 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 2 |
| 2020 | 2 | 1 |
| 2021 | 0 | 1 |
| 2022 | 2 | 2 |
| 2023 | 2 | 2 |
| 2024 | 0 | 1 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low-CTE, low-puffing needle coke20 May 2025US 12,304,819 B2Nippon Steel Chemical & Material Co., Ltd.
- Using stimulus to convert coal to mesophase pitch and carbon fibers28 Jan 2025US 12,209,220 B2Carbon Holdings Intellectual Properties, LLC
- Using stimulus to convert coal to mesophase pitch and carbon fibers29 Aug 2023US 11,739,271 B2Carbon Holdings Intellectual Properties, LLC
- Heat treatment process for increased pitch yields11 Apr 2023US 11,624,029 B2Koppers Delaware, Inc.
- Using stimulus to convert coal to mesophase pitch and carbon fibers12 Jul 2022US 11,384,288 B2Carbon Holdings Intellectual Properties, LLC
- Extracts of coal and uses thereof15 Jan 2026US 2026/0015504 A1
- Using stimulus to convert coal to mesophase pitch and carbon fibers24 Apr 2025US 2025/0129293 A1Carbon Holdings Intellectual Properties, LLC
- Heat treatment product by process for increased pitch yields20 Mar 2025US 2025/0092315 A1Koppers Delaware, Inc.
- Using stimulus to convert coal to mesophase pitch and carbon fibers25 Jan 2024US 2024/0026225 A1Carbon Holdings Intellectual Properties, LLC
- Heat treatment product by process for increased pitch yields31 Aug 2023US 2023/0272285 A1Koppers Delaware, Inc.
Most cited
By later US patents
- Process for de-ashing coal tar22US 5,534,137 AReilly Industries, Inc. · 1996
- Coal tar pitch and the preparation and use thereof21US 5,262,043 ARutgerswerke Aktiengesellschaft · 1993
- Process for the preparation of an intermediate pitch for manufacturing carbon products17US 4,705,618 AMaruzen Petrochemical Co., Ltd. · 1987
- Process for making carbon electrode impregnating pitch from coal tar11US 5,326,457 AAristech Chemical Corporation · 1994
- Method of production of solids-free coal tar pitch10US 5,843,298 AUCAR Carbon Technology Corporation · 1998