F16L 15/00
Screw-threaded joints
Official title: Screw-threaded joints; Forms of screw-threads for such joints
F16L15/00 (Screw-threaded joints) appears on 1,697 US grants and 1,657 published applications in this corpus.
Search patents in F16L- Granted patents
- 1,697
- Published applications
- 1,657
- Assignees
- 808
- Inventors
- 2,700
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 12 | 0 |
| 1978 | 10 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 10 | 0 |
| 1984 | 15 | 0 |
| 1985 | 21 | 0 |
| 1986 | 35 | 0 |
| 1987 | 29 | 0 |
| 1988 | 19 | 0 |
| 1989 | 22 | 0 |
| 1990 | 21 | 0 |
| 1991 | 16 | 0 |
| 1992 | 15 | 0 |
| 1993 | 14 | 0 |
| 1994 | 12 | 0 |
| 1995 | 23 | 0 |
| 1996 | 16 | 0 |
| 1997 | 9 | 0 |
| 1998 | 14 | 0 |
| 1999 | 13 | 0 |
| 2000 | 20 | 0 |
| 2001 | 21 | 3 |
| 2002 | 26 | 27 |
| 2003 | 27 | 45 |
| 2004 | 36 | 61 |
| 2005 | 26 | 48 |
| 2006 | 41 | 57 |
| 2007 | 14 | 51 |
| 2008 | 28 | 52 |
| 2009 | 36 | 33 |
| 2010 | 36 | 46 |
| 2011 | 32 | 59 |
| 2012 | 34 | 53 |
| 2013 | 29 | 49 |
| 2014 | 39 | 64 |
| 2015 | 49 | 98 |
| 2016 | 55 | 109 |
| 2017 | 80 | 97 |
| 2018 | 89 | 118 |
| 2019 | 105 | 100 |
| 2020 | 94 | 89 |
| 2021 | 77 | 78 |
| 2022 | 90 | 79 |
| 2023 | 79 | 78 |
| 2024 | 78 | 72 |
| 2025 | 80 | 51 |
| 2026 | 34 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F16L 15/001Screw-threaded joints: with conical threads788
- F16L 15/006Screw-threaded joints: with straight threads443
- F16L 15/08Screw-threaded joints: with supplementary elements394
- F16L 15/04Screw-threaded joints: with additional sealings275
- F16L 15/06Screw-threaded joints: characterised by the shape of the screw-thread242
- F16L 15/02Allowing substantial longitudinal adjustment by the use of a long screw-threaded part45
- F16L 15/005Screw-threaded joints: for thin-walled pipes having at least their extremities deformed so9
Recent patents
- Tool string transportation device6 Oct 2026US 12,753,667 B2Petromac IP Limited
- Sleeve for securing a valve assembly6 Oct 2026US 12,753,857 B1Snf S.A.S.
- Dual-use adaptor and speaker stand having the same22 Sep 2026US 12,742,509 B2K. H. S. Musical Instrument Co., Ltd.
- Steel pipe joint structure and method for processing steel pipe1 Sep 2026US 12,723,684 B2Metal One Corporation
- Thread adapter25 Aug 2026US 12,715,321 B2Eaton Intelligent Power Limited
- Threaded Joint8 Oct 2026US 2026/0308988 A1Diversity Technologies Corporation
- Well pipe having electrical conductor with improved electrical contacts1 Oct 2026US 2026/0298379 A1
- Oil-well metal pipe27 Aug 2026US 2026/0251256 A1Nippon Steel Corporation
- Hose rotator20 Aug 2026US 2026/0243376 A1Gammon Technical Products, Inc.
- Spring loaded fitting for connecting and disconnecting capillaries13 Aug 2026US 2026/0235234 A1Agilent Technologies, Inc.
Most cited
By later US patents
- Downhole data transmission system288US 6,670,880 B1Novatek Engineering, Inc. · 2003
- Expandable joint connector281US 6,409,175 B1Grant Prideco, L.P. · 2002
- Plastic needleless valve housing for standard male luer locks272US 5,441,487 AMedex, Inc. · 1995
- Anti-reflux valve with environmental barrier246US 5,578,059 AMedex, Inc. · 1996
- Buttress thread form180US 5,092,635 ABaker Hughes Incorporated · 1992