F16J 15/44
Free-space packings
F16J15/44 (Free-space packings) appears on 1,594 US grants and 1,470 published applications in this corpus.
Search patents in F16J- Granted patents
- 1,594
- Published applications
- 1,470
- Assignees
- 511
- Inventors
- 2,864
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 14 | 0 |
| 1978 | 19 | 0 |
| 1979 | 21 | 0 |
| 1980 | 15 | 0 |
| 1981 | 13 | 0 |
| 1982 | 11 | 0 |
| 1983 | 15 | 0 |
| 1984 | 20 | 0 |
| 1985 | 9 | 0 |
| 1986 | 11 | 0 |
| 1987 | 10 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 13 | 0 |
| 1991 | 20 | 0 |
| 1992 | 12 | 0 |
| 1993 | 14 | 0 |
| 1994 | 12 | 0 |
| 1995 | 9 | 0 |
| 1996 | 17 | 0 |
| 1997 | 9 | 0 |
| 1998 | 11 | 0 |
| 1999 | 16 | 0 |
| 2000 | 30 | 0 |
| 2001 | 33 | 8 |
| 2002 | 36 | 18 |
| 2003 | 24 | 24 |
| 2004 | 18 | 30 |
| 2005 | 16 | 21 |
| 2006 | 17 | 30 |
| 2007 | 17 | 58 |
| 2008 | 16 | 37 |
| 2009 | 14 | 37 |
| 2010 | 30 | 43 |
| 2011 | 34 | 50 |
| 2012 | 34 | 47 |
| 2013 | 33 | 49 |
| 2014 | 39 | 62 |
| 2015 | 46 | 68 |
| 2016 | 51 | 96 |
| 2017 | 56 | 97 |
| 2018 | 79 | 116 |
| 2019 | 114 | 111 |
| 2020 | 121 | 117 |
| 2021 | 115 | 87 |
| 2022 | 85 | 86 |
| 2023 | 72 | 59 |
| 2024 | 73 | 58 |
| 2025 | 51 | 34 |
| 2026 | 23 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Armament system with a non-rotating slip-fit labyrinth seal8 Sep 2026US 12,729,767 B1The United States of America as represented by the Secretary of the Army
- Sealing ring25 Aug 2026US 12,716,361 B2Industria De Turbo Propulsores, S.A.U.
- Labyrinth seal for rear of internal combustion engine25 Aug 2026US 12,716,504 B1Deere & Company
- Blast furnace distributing device with nitrogen sealing structure4 Aug 2026US 12,698,540 B2
- High pressure gas sealing23 Jun 2026US 12,663,015 B2Dover Pumps & Process Solutions Segment, Inc.
- Seal structure, rotary table device, and machine tool8 Oct 2026US 2026/0309233 A1Fanuc Corporation
- Axial pump with reduced clearance feature1 Oct 2026US 2026/0298345 A1Pratt & Whitney Canada Corp.
- Seal device24 Sep 2026US 2026/0287062 A1Mitsubishi Heavy Industries, Ltd.
- Hydrostatic annular seal10 Sep 2026US 2026/0266188 A1Safran Aircraft Engines
- Machine tool control device10 Sep 2026US 2026/0267309 A1Fanuc Corporation
Most cited
By later US patents
- Thermal seal for a gas turbine spacer disc1,527US 5,080,556 AGeneral Electric Company · 1992
- Permanent magnet floating shaft seal499US 5,137,286 AGeneral Electric Company · 1992
- Split ring seal of a centrifugal pump122US 4,867,638 AAlbert Handtmann Elteka GmbH & Co. KG · 1989
- Hydrodynamic lift seal for use with compressible fluids90US 6,145,843 AStein Seal Company · 2000
- Effective sealing device for engine flowpath85US 5,169,159 AGeneral Electric Company · 1992