F16N 21/00
Conduits
Official title: Conduits; Junctions (in general F16L); Fittings for lubrication apertures
F16N21/00 (Conduits) appears on 279 US grants and 220 published applications in this corpus.
Search patents in F16N- Granted patents
- 279
- Published applications
- 220
- Assignees
- 191
- Inventors
- 525
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 8 | 0 |
| 1992 | 4 | 0 |
| 1993 | 10 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 2 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 7 |
| 2005 | 4 | 7 |
| 2006 | 4 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 6 |
| 2012 | 1 | 5 |
| 2013 | 4 | 8 |
| 2014 | 5 | 10 |
| 2015 | 11 | 12 |
| 2016 | 10 | 21 |
| 2017 | 13 | 24 |
| 2018 | 9 | 17 |
| 2019 | 17 | 21 |
| 2020 | 19 | 20 |
| 2021 | 13 | 7 |
| 2022 | 8 | 9 |
| 2023 | 10 | 9 |
| 2024 | 9 | 12 |
| 2025 | 11 | 7 |
| 2026 | 9 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Grease filling apparatus for manual grease gun25 Aug 2026US 12,716,548 B2
- Arrangement and method for sealing a propeller shaft of a marine vessel18 Aug 2026US 12,709,372 B2ABB AB
- Oil tank access port cover for an aircraft engine oil system16 Jun 2026US 12,655,935 B2Pratt & Whitney Canada Corp.
- Lubricant filter system, aircraft engine, and method of operating a lubricant system19 May 2026US 12,631,133 B2Pratt & Whitney Canada Corp.
- Oil tank return for an aircraft engine oil system31 Mar 2026US 12,590,551 B1Pratt & Whitney Canada Corp.
- Semi-trailer hub cap cover with zerk fitting10 Sep 2026US 2026/0264447 A1
- Lubricating a rail interface10 Sep 2026US 2026/0266425 A1Applied Materials Israel Ltd.
- Grease Filling Apparatus For Manual Grease Gun18 Jun 2026US 2026/0168618 A1
- Lubrication wheel for a speed reducer of a turbomachine9 Apr 2026US 2026/0098484 A1Safran Transmission Systems
- Oil tank return for an aircraft engine oil system26 Mar 2026US 2026/0085626 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Latch integral with latched apparatus48US 4,639,249 A1987
- Accessory drive spline lubrication system for a turbine engine reduction gear box44US 5,119,905 AGeneral Motors Corporation · 1992
- Device to assist with the radial distribution of lubricating fluid from a rotating shaft41US 4,987,974 ASaturn Corporation · 1991
- Crankcase drain assembly36US 4,025,048 A1977
- Filter element shutoff valve36US 4,222,875 ADeere & Company · 1980