C04B 2235/5248
Carbon
Official title: Carbon, e.g. graphite
C04B2235/5248 (Carbon) appears on 914 US grants and 978 published applications in this corpus.
Search patents in C04B- Granted patents
- 914
- Published applications
- 978
- Assignees
- 444
- Inventors
- 2,005
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 17 | 0 |
| 1991 | 13 | 0 |
| 1992 | 19 | 0 |
| 1993 | 10 | 0 |
| 1994 | 18 | 0 |
| 1995 | 16 | 0 |
| 1996 | 20 | 0 |
| 1997 | 16 | 0 |
| 1998 | 12 | 0 |
| 1999 | 11 | 0 |
| 2000 | 12 | 0 |
| 2001 | 16 | 3 |
| 2002 | 11 | 24 |
| 2003 | 10 | 27 |
| 2004 | 16 | 20 |
| 2005 | 10 | 23 |
| 2006 | 12 | 22 |
| 2007 | 16 | 26 |
| 2008 | 14 | 22 |
| 2009 | 6 | 30 |
| 2010 | 15 | 23 |
| 2011 | 11 | 25 |
| 2012 | 21 | 30 |
| 2013 | 15 | 39 |
| 2014 | 18 | 35 |
| 2015 | 30 | 36 |
| 2016 | 29 | 53 |
| 2017 | 45 | 61 |
| 2018 | 46 | 54 |
| 2019 | 53 | 54 |
| 2020 | 49 | 55 |
| 2021 | 49 | 72 |
| 2022 | 29 | 36 |
| 2023 | 57 | 65 |
| 2024 | 49 | 67 |
| 2025 | 41 | 47 |
| 2026 | 40 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Block copolymer porous carbon fibers and uses thereof25 Aug 2026US 12,715,819 B2Virginia Tech Intellectual Properties, Inc.
- Fibrous preform of a friction part18 Aug 2026US 12,709,580 B2Safran Landing Systems
- Ceramic matrix composites and their preforms11 Aug 2026US 12,703,169 B2Rtx Corporation
- Thermal insulation materials suitable for use at high temperatures, and process for making said materials21 Jul 2026US 12,686,643 B2Mersen Scotland Holytown Limited
- Additively manufactured graphite tooling14 Jul 2026US 12,678,997 B2Rtx Corporation
- Thermal insulation materials suitable for use at high temperatures, and process for making said materials8 Oct 2026US 2026/0308071 A1Mersen Scotland Holytown Limited
- Processes for the preparation of (3s,4r)-3-ethyl-4-(3h-imidazo[1,2-a]pyrrolo[2,3-e]-pyrazin-8-yl)-n-(2,2,2-trifluoroethyl)pyrrolidine-1-carboxamide and solid state forms thereof8 Oct 2026US 2026/0308162 A1
- Fiber composite felt8 Oct 2026US 2026/0309422 A1Sgl Carbon SE
- Oxidative resistance of carbon-carbon composites for piston seals in a gas turbine engine10 Sep 2026US 2026/0265154 A1Rtx Corporation
- Composite panel core structure27 Aug 2026US 2026/0250208 A1General Electric Company
Most cited
By later US patents
- Carbon fibrils, method for producing same and compositions containing same361US 4,663,230 AHyperion Catalysis International, Inc. · 1987
- Nanotube fiber reinforced composite materials and method of producing fiber reinforced composites261US 6,934,600 B2Auburn University · 2005
- Carbon fibrils and method for producing same250US 5,165,909 AHyperion Catalysis Int'l., Inc. · 1992
- Electrostatic chuck having gas cavity and method244US 6,310,755 B1APPLIED Materials.Inc. · 2001
- Composite synthetic materials149US 4,960,643 A1990