C04B 41/81
Coating or impregnation
C04B41/81 (Coating or impregnation) appears on 4,288 US grants and 3,525 published applications in this corpus.
Search patents in C04B- Granted patents
- 4,288
- Published applications
- 3,525
- Assignees
- 1,747
- Inventors
- 9,242
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 32 | 0 |
| 1977 | 28 | 0 |
| 1978 | 21 | 0 |
| 1979 | 18 | 0 |
| 1980 | 39 | 0 |
| 1981 | 41 | 0 |
| 1982 | 40 | 0 |
| 1983 | 50 | 0 |
| 1984 | 59 | 0 |
| 1985 | 54 | 0 |
| 1986 | 66 | 0 |
| 1987 | 67 | 0 |
| 1988 | 60 | 0 |
| 1989 | 100 | 0 |
| 1990 | 86 | 0 |
| 1991 | 140 | 0 |
| 1992 | 123 | 0 |
| 1993 | 137 | 0 |
| 1994 | 113 | 0 |
| 1995 | 92 | 0 |
| 1996 | 97 | 0 |
| 1997 | 105 | 0 |
| 1998 | 114 | 0 |
| 1999 | 98 | 0 |
| 2000 | 90 | 0 |
| 2001 | 101 | 33 |
| 2002 | 88 | 104 |
| 2003 | 105 | 139 |
| 2004 | 106 | 120 |
| 2005 | 74 | 118 |
| 2006 | 59 | 118 |
| 2007 | 57 | 111 |
| 2008 | 51 | 108 |
| 2009 | 68 | 138 |
| 2010 | 63 | 147 |
| 2011 | 67 | 123 |
| 2012 | 77 | 112 |
| 2013 | 80 | 109 |
| 2014 | 75 | 99 |
| 2015 | 64 | 116 |
| 2016 | 87 | 147 |
| 2017 | 88 | 138 |
| 2018 | 100 | 147 |
| 2019 | 101 | 180 |
| 2020 | 124 | 175 |
| 2021 | 109 | 200 |
| 2022 | 112 | 164 |
| 2023 | 145 | 169 |
| 2024 | 148 | 210 |
| 2025 | 155 | 183 |
| 2026 | 114 | 117 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method to control dissolution of silicon carbide during fabrication of a ceramic matrix composite6 Oct 2026US 12,753,127 B1Rolls-Royce High Temperature Composites Inc.
- Materials and processes for generating radioisotopes6 Oct 2026US 12,755,857 B2AdvanCell IPCo US No. 1 Pty Ltd
- Composite ceramic substrate having multi-layer configuration29 Sep 2026US 12,747,191 B2Tong Hsing Electronic Industries, Ltd.
- Environmental barrier coating29 Sep 2026US 12,747,192 B2Rtx Corporation
- Luminescent ink and ceramic product with a label printed with luminescent ink22 Sep 2026US 12,742,087 B2AsociacióN De InvestigacióN De Las Industrias Ceramicas (Aice)
- Environmental barrier coating8 Oct 2026US 2026/0308075 A1Rtx Corporation
- Controlled particle injection in fabric for improved microstructre homogeneity in cmcs24 Sep 2026US 2026/0285770 A1Rtx Corporation
- Composite structures and associated methods24 Sep 2026US 2026/0285771 A1Battelle Energy Alliance, LLC
- Metal carbide-coated carbon material24 Sep 2026US 2026/0285774 A1Shin-Etsu Chemical Co., Ltd.
- Slurry-based methods for forming a bond coat and articles formed by the methods17 Sep 2026US 2026/0274760 A1General Electric Company
Most cited
By later US patents
- Process for converting a metal carbide to carbon by etching in halogens566US 6,579,833 B1The Board of Trustees of the University of Illinois · 2003
- Method for thermally spraying crack-free mullite coatings on ceramic-based substrates541US 6,296,909 B1General Electric Company · 2001
- Halogen gas plasma-resistive members and method for producing the same, laminates, and corrosion-resistant members455US 6,783,875 B2NGK Insulators, Ltd. · 2004
- Si/SiC composite material and method for making Si/SiC composite material388US 5,494,439 AIntel Corporation · 1996
- Method of preparing nano-structured surface coatings and coated articles383US 7,892,606 B2Dsm IP Assets B.V. · 2011