F16J 15/20
Packing materials therefor
F16J15/20 (Packing materials therefor) appears on 276 US grants and 186 published applications in this corpus.
Search patents in F16J- Granted patents
- 276
- Published applications
- 186
- Assignees
- 162
- Inventors
- 470
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 10 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 7 | 0 |
| 1984 | 6 | 0 |
| 1985 | 7 | 0 |
| 1986 | 1 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 3 | 0 |
| 1996 | 8 | 0 |
| 1997 | 8 | 0 |
| 1998 | 11 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 3 |
| 2002 | 4 | 2 |
| 2003 | 6 | 5 |
| 2004 | 1 | 5 |
| 2005 | 1 | 9 |
| 2006 | 6 | 6 |
| 2007 | 1 | 3 |
| 2008 | 4 | 4 |
| 2009 | 0 | 6 |
| 2010 | 2 | 3 |
| 2011 | 0 | 4 |
| 2012 | 4 | 6 |
| 2013 | 1 | 10 |
| 2014 | 5 | 5 |
| 2015 | 5 | 12 |
| 2016 | 13 | 4 |
| 2017 | 6 | 10 |
| 2018 | 3 | 12 |
| 2019 | 12 | 12 |
| 2020 | 7 | 8 |
| 2021 | 10 | 7 |
| 2022 | 8 | 14 |
| 2023 | 12 | 5 |
| 2024 | 7 | 17 |
| 2025 | 13 | 6 |
| 2026 | 2 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sealing device and back-up ring25 Aug 2026US 12,716,494 B2Nok Corporation
- Gland packing2 Jun 2026US 12,643,727 B2Nippon Pillar Packing Co., Ltd.
- Functionally graded composite structures30 Sep 2025US 12,429,092 B2Dover Pumps & Process Solutions Segment, Inc.
- Shaft sealing structure9 Sep 2025US 12,410,864 B2SMC Corporation
- Fire-resistant seal assemblies2 Sep 2025US 12,404,934 B2Greene, Tweed Technologies, Inc.
- High pressure seal adapted for use as a cft seal25 Jun 2026US 2026/0177147 A1Cdi Energy Products, Inc.
- High performance sealing assembly18 Jun 2026US 2026/0168490 A1Vulcan Industrial Holdings, LLC
- Packing material cartridge28 May 2026US 2026/0146681 A1A. W. Chesterton Company
- Systems, assemblies, apparatuses, and methods providing enhanced seal between machine components14 May 2026US 2026/0132850 A1Vulcan Industrial Holdings, LLC
- Bi-directional compression loaded mechanical packing sealing assembly30 Apr 2026US 2026/0117870 A1A.W.Chestertoncompany
Most cited
By later US patents
- Seal and seal assembly for well tools77US 4,753,444 AOtis Engineering Corporation · 1988
- Graphite spiral packing for stuffing box and method for manufacturing the same63US 4,934,657 A1990
- Y-Interlock packing seal60US 4,398,731 A1983
- Seal utilizing composites of flexible graphite particles and amorphous carbon60US 4,826,181 AUnion Carbide Corporation · 1989
- Conduit sealing system52US 4,234,197 ABaker International Corporation · 1980