C04B 2235/6581
Total pressure below 1 atmosphere
Official title: Total pressure below 1 atmosphere, e.g. vacuum
C04B2235/6581 (Total pressure below 1 atmosphere) appears on 743 US grants and 790 published applications in this corpus.
Search patents in C04B- Granted patents
- 743
- Published applications
- 790
- Assignees
- 456
- Inventors
- 1,912
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 7 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 12 | 0 |
| 1992 | 15 | 0 |
| 1993 | 7 | 0 |
| 1994 | 7 | 0 |
| 1995 | 10 | 0 |
| 1996 | 17 | 0 |
| 1997 | 6 | 0 |
| 1998 | 9 | 0 |
| 1999 | 14 | 0 |
| 2000 | 9 | 0 |
| 2001 | 5 | 5 |
| 2002 | 7 | 10 |
| 2003 | 13 | 28 |
| 2004 | 17 | 25 |
| 2005 | 20 | 32 |
| 2006 | 12 | 22 |
| 2007 | 15 | 28 |
| 2008 | 20 | 23 |
| 2009 | 15 | 24 |
| 2010 | 17 | 44 |
| 2011 | 20 | 39 |
| 2012 | 33 | 38 |
| 2013 | 16 | 42 |
| 2014 | 37 | 32 |
| 2015 | 27 | 29 |
| 2016 | 23 | 29 |
| 2017 | 26 | 31 |
| 2018 | 25 | 30 |
| 2019 | 29 | 35 |
| 2020 | 27 | 39 |
| 2021 | 38 | 32 |
| 2022 | 22 | 35 |
| 2023 | 30 | 60 |
| 2024 | 37 | 37 |
| 2025 | 34 | 30 |
| 2026 | 19 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High-entropy carbide ceramic and rare earth-containing high-entropy carbide ceramic, fibers and precursors thereof, and methods for preparing the same11 Aug 2026US 12,703,667 B2Institute of Chemistry, Chinese Academy of Sciences
- Methods of providing high purity SiOC and SiC materials4 Aug 2026US 12,698,241 B2Pallidus, Inc.
- Multilayer sintered ceramic body14 Jul 2026US 12,679,777 B2Heraeus Covantics North America LLC
- Oxynitride ceramic material with lithium addition14 Jul 2026US 12,683,189 B1King Fahd University of Petroleum and Minerals
- Bonded body, ceramic-copper circuit board, and semiconductor device26 May 2026US 12,642,091 B2Niterra Materials Co., Ltd.
- High Purity SiOC and SiC, Methods Compositions and Applications1 Oct 2026US 2026/0296898 A1Pallidus, Inc.
- Heat Dissipation Substrate for a Power Semiconductor Module, Manufacturing Method thereof, and Convertor including the same13 Aug 2026US 2026/0239967 A1Lx Semicon Co., Ltd.
- Heat Dissipation Substrate for Power Semiconductor, Power Semiconductor Module including the same, Power Convertor including the same, and Manufacturing method thereof13 Aug 2026US 2026/0239968 A1Lx Semicon Co., Ltd.
- Coating by cmc curing for high thermal protection30 Jul 2026US 2026/0217620 A1Paxis LLC
- Processes for fabricating ceramic matrix composites21 May 2026US 2026/0138932 A1Rtx Corporation
Most cited
By later US patents
- Functionally stepped, resistive ceramic163US 5,880,439 APhilip Morris Incorporated · 1999
- Method for joining ceramic shapes128US 5,139,594 AThe United States of America as represented by the United States Department of Energy · 1992
- Graphite-loaded silicon carbide112US 5,486,496 AAlumina Ceramics Co. (ACI) · 1996
- Modified oxygen reduced valve metal oxides108US 6,639,787 B2Cabot Corporation · 2003
- Graphite-loaded silicon carbide105US 5,543,368 AAlumina Ceramics Co. (ACI) · 1996