D01F 9/145
From pitch or distillation residues
Official title: from pitch or distillation residues
D01F9/145 (From pitch or distillation residues) appears on 374 US grants and 156 published applications in this corpus.
Search patents in D01F- Granted patents
- 374
- Published applications
- 156
- Assignees
- 156
- Inventors
- 690
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 10 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 12 | 0 |
| 1982 | 9 | 0 |
| 1983 | 6 | 0 |
| 1984 | 23 | 0 |
| 1985 | 21 | 0 |
| 1986 | 19 | 0 |
| 1987 | 13 | 0 |
| 1988 | 7 | 0 |
| 1989 | 17 | 0 |
| 1990 | 16 | 0 |
| 1991 | 14 | 0 |
| 1992 | 8 | 0 |
| 1993 | 13 | 0 |
| 1994 | 12 | 0 |
| 1995 | 9 | 0 |
| 1996 | 10 | 0 |
| 1997 | 12 | 0 |
| 1998 | 8 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 3 |
| 2002 | 3 | 5 |
| 2003 | 5 | 5 |
| 2004 | 4 | 5 |
| 2005 | 0 | 0 |
| 2006 | 2 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 3 |
| 2010 | 4 | 3 |
| 2011 | 1 | 4 |
| 2012 | 1 | 3 |
| 2013 | 0 | 4 |
| 2014 | 4 | 7 |
| 2015 | 1 | 4 |
| 2016 | 1 | 4 |
| 2017 | 7 | 7 |
| 2018 | 2 | 9 |
| 2019 | 6 | 13 |
| 2020 | 7 | 8 |
| 2021 | 8 | 16 |
| 2022 | 7 | 3 |
| 2023 | 9 | 14 |
| 2024 | 9 | 15 |
| 2025 | 9 | 12 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pitch-based ultrafine carbon fibers and pitch-based ultrafine carbon fiber dispersion15 Sep 2026US 12,735,814 B2Teijin Limited
- Pitch compositions for spinning into carbon articles and methods relating thereto19 May 2026US 12,630,947 B2ExxonMobil Technology and Engineering Company
- Thermal conversion of heavy hydrocarbons to mesophase pitch28 Apr 2026US 12,612,562 B2ExxonMobil Chemical Patents Inc.
- Controlling mesophase softening point and production yield by varying solvent SBN via solvent deasphalting31 Mar 2026US 12,590,251 B2ExxonMobil Chemical Patents Inc.
- Steam cracking process for converting crude oils to pitch compositions spinnable into carbon articles10 Mar 2026US 12,570,905 B2ExxonMobil Technology and Engineering Company
- Asphaltene-based melt-blown nanofiber mats6 Aug 2026US 2026/0226664 A1The University of British Columbia
- Mesophase pitch for carbon fiber and method for producing mesophase pitch-based carbon fiber16 Jul 2026US 2026/0201611 A1Kyushu University, National University Corporation
- Systems and processes for producing low cost bulk random carbon fibers using asphaltene as a feedstock25 Jun 2026US 2026/0176798 A1B.C. Research Inc.
- Activated carbon fibers for filtration and methods of manufacture14 May 2026US 2026/0132033 A1Carbon Holdings Intellectual Properties, LLC
- Chemical compound capture system and method5 Feb 2026US 2026/0035839 A1Carbon Holdings Intellectual Properties, LLC
Most cited
By later US patents
- High modulus, high strength carbon fibers produced from mesophase pitch102US 4,005,183 AUnion Carbide Corporation · 1977
- Process and apparatus for the production of nanofibers101US 6,695,992 B2The University of Akron · 2004
- Forming optically anisotropic pitches75US 4,208,267 AExxon Research & Engineering Co. · 1980
- Low molecular weight mesophase pitch59US 4,209,500 AUnion Carbide Corporation · 1980
- Process for producing mesophase pitch57US 4,026,788 AUnion Carbide Corporation · 1977