F16K 3/36
Features relating to lubrication
F16K3/36 (Features relating to lubrication) appears on 57 US grants and 52 published applications in this corpus.
Search patents in F16K- Granted patents
- 57
- Published applications
- 52
- Assignees
- 47
- Inventors
- 98
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 2 |
| 2015 | 3 | 1 |
| 2016 | 2 | 2 |
| 2017 | 1 | 3 |
| 2018 | 2 | 0 |
| 2019 | 1 | 2 |
| 2020 | 1 | 5 |
| 2021 | 5 | 7 |
| 2022 | 3 | 4 |
| 2023 | 5 | 7 |
| 2024 | 6 | 2 |
| 2025 | 4 | 6 |
| 2026 | 4 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gate valves with dynamic skirts and multiple energizers24 Mar 2026US 12,584,560 B2Bestway Oilfield, Inc.
- Concentric valve skirts3 Mar 2026US 12,565,933 B1Bestway Oilfield, Inc.
- Dynamic slab gate valves24 Feb 2026US 12,560,244 B2Bestway Oilfield, Inc.
- Dynamic slab gate valves20 Jan 2026US 12,529,429 B2Bestway Oilfield, Inc.
- Dynamic slab gate valves26 Aug 2025US 12,398,809 B2Bestway Oilfield, Inc.
- Improved Gate Valve for Mitigating Grease Loss in a Well Fracturing Environment, and Method of Use Thereof1 Oct 2026US 2026/0298352 A1Boss Greaseless Frac Valve LLC
- Sleeve seal lubrication system and method for a gate valve6 Aug 2026US 2026/0226990 A1Weir Minerals U.S. Inc.
- Dynamic Slab Gate Valves25 Jun 2026US 2026/0177149 A1Bestway Oilfield, Inc.
- Switching valve and switching unit for switching at least two fluid channels18 Jun 2026US 2026/0168579 A1Mann+Hummel GmbH
- Concentric Valve Skirts28 May 2026US 2026/0146675 A1Bestway Oilfield, Inc.
Most cited
By later US patents
- High pressure gate valve with preloaded, stacked, solid lubricated stem seals80US 4,340,204 ASmith International, Inc. · 1982
- High pressure valve41US 4,029,294 AMcEvoy Oilfield Equipment Company · 1977
- Lubrication system for valve seat of a gate valve36US 5,341,835 AFoster Valve Corporation · 1994
- Spool valve35US 4,593,719 A1986
- Piston valve29US 5,971,007 ASnap-Tite Technologies, Inc. · 1999