D01F 9/322
For manufacturing filaments from pitch
Official title: {for manufacturing filaments from pitch}
D01F9/322 (For manufacturing filaments from pitch) appears on 77 US grants and 16 published applications in this corpus.
Search patents in D01F- Granted patents
- 77
- Published applications
- 16
- Assignees
- 45
- Inventors
- 164
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 8 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 8 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 2 | 1 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 2 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 4 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pitch compositions for spinning into carbon articles and methods relating thereto19 May 2026US 12,630,947 B2ExxonMobil Technology and Engineering Company
- Extruder systems and processes for production of petroleum coke and mesophase pitch16 Apr 2024US 11,959,022 B2Saudi Arabian Oil Company
- Supercritical CO2 solvated process to convert coal to carbon fibers13 Dec 2022US 11,525,091 B2Carbon Holdings Intellectual Properties, LLC
- Flexible pyrolysis system and method29 Sep 2020US 10,787,610 B2TerraPower, LLC
- Fiber oxidation oven with multiple independently controllable heating systems7 Nov 2017US 9,809,909 B2Illinois Tool Works Inc.
- Systems and processes for producing low cost bulk random carbon fibers using asphaltene as a feedstock25 Jun 2026US 2026/0176798 A1B.C. Research Inc.
- Pitch Compositions For Spinning Into Carbon Articles And Methods Relating Thereto28 Dec 2023US 2023/0416949 A1ExxonMobil Technology and Engineering Company
- Extruder systems and processes for production of petroleum coke and mesophase pitch25 May 2023US 2023/0159828 A1Saudi Arabian Oil Company
- Supercritical CO2 Solvated Process to Convert Coal to Carbon Fibers23 Mar 2023US 2023/0091961 A1Carbon Holdings Intellectual Properties, LLC
- Method for manufacturing high yield mesophase pitch and high yield mesophase pitch manufactured therefrom5 Jan 2023US 2023/0002680 A1Korea Research Institute of Chemical Technology
Most cited
By later US patents
- Process for producing carbon fibers from mesophase pitch51US 3,976,729 AUnion Carbide Corporation · 1976
- Treatment of pitches in carbon artifact manufacture42US 4,277,324 AExxon Research & Engineering Co. · 1981
- Process for producing carbon fibers from mesophase pitch38US 4,032,430 AUnion Carbide Corporation · 1977
- Method for adsorbing harmful substance34US 4,046,525 AToyobo Co., Ltd. · 1977
- Process for production of carbon artifact precursor34US 4,271,006 AExxon Research & Engineering Co. · 1981