F16J 15/30
With sealing rings made of carbon
Official title: with sealing rings made of carbon
F16J15/30 (With sealing rings made of carbon) appears on 83 US grants and 68 published applications in this corpus.
Search patents in F16J- Granted patents
- 83
- Published applications
- 68
- Assignees
- 48
- Inventors
- 138
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 3 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 2 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 3 | 6 |
| 2015 | 0 | 1 |
| 2016 | 6 | 4 |
| 2017 | 1 | 1 |
| 2018 | 4 | 2 |
| 2019 | 2 | 3 |
| 2020 | 3 | 9 |
| 2021 | 4 | 13 |
| 2022 | 12 | 2 |
| 2023 | 5 | 7 |
| 2024 | 7 | 4 |
| 2025 | 5 | 5 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Circumferential sealing assembly with duct-fed hydrodynamic grooves31 Mar 2026US 12,590,638 B2Stein Seal Company
- Gas turbine engine with carbon/carbon composite piston seal27 Jan 2026US 12,535,013 B2Rtx Corporation
- Seal assembly mating plate for aircraft powerplant21 Oct 2025US 12,448,904 B1Pratt & Whitney Canada Corp.
- Carbon radial seal23 Sep 2025US 12,421,901 B2Rtx Corporation
- Gas turbine engine with carbon/carbon composite piston seal8 Jul 2025US 12,352,173 B2Rtx Corporation
- Circumferential Sealing Assembly with Duct-Fed Hydrodynamic Grooves9 Jul 2026US 2026/0194144 A1Stein Seal Company
- Carbon Radial Seal4 Jun 2026US 2026/0153056 A1Rtx Corporation
- Sealing device and turbomachine comprising the sealing device16 Apr 2026US 2026/0103992 A1Safran Aircraft Engines
- Gas turbine engine with split helical piston seal13 Nov 2025US 2025/0345982 A1Raytheon Technologies Corporation
- Gas turbine engine with carbon/carbon composite piston seal30 Oct 2025US 2025/0334054 A1Rtx Corporation
Most cited
By later US patents
- Flexible non-planar graphite sealing ring65US 5,201,532 AMark Controls Corporation · 1993
- Shaft seal assembly and seal ring therefor61US 4,116,451 AMaurer Engineering Inc. · 1978
- Seal utilizing composites of flexible graphite particles and amorphous carbon60US 4,826,181 AUnion Carbide Corporation · 1989
- Valve sealing device and a valve47US 4,269,391 AKitamura Valve Seizo Kabushiki Kaisha · 1981
- Non-planar flexible graphite sealing rings47US 5,478,048 AMark Controls Corporation · 1995