F16L 21/002
Sleeves or nipples for pipes of the same diameter
Official title: {Sleeves or nipples for pipes of the same diameter; Reduction pieces (F16L27/00, F16L37/00 take precedence; with elastic sealing rings F16L21/022)}
F16L21/002 (Sleeves or nipples for pipes of the same diameter) appears on 434 US grants and 421 published applications in this corpus.
Search patents in F16L- Granted patents
- 434
- Published applications
- 421
- Assignees
- 263
- Inventors
- 726
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 11 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 7 | 1 |
| 2002 | 4 | 3 |
| 2003 | 5 | 9 |
| 2004 | 7 | 9 |
| 2005 | 3 | 16 |
| 2006 | 5 | 10 |
| 2007 | 3 | 4 |
| 2008 | 5 | 23 |
| 2009 | 4 | 13 |
| 2010 | 7 | 15 |
| 2011 | 8 | 11 |
| 2012 | 4 | 9 |
| 2013 | 9 | 10 |
| 2014 | 11 | 17 |
| 2015 | 8 | 30 |
| 2016 | 20 | 19 |
| 2017 | 15 | 20 |
| 2018 | 25 | 31 |
| 2019 | 16 | 19 |
| 2020 | 30 | 29 |
| 2021 | 23 | 20 |
| 2022 | 21 | 26 |
| 2023 | 21 | 19 |
| 2024 | 21 | 21 |
| 2025 | 23 | 22 |
| 2026 | 14 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Quick-fitting pipe fitting29 Sep 2026US D1,149,644 S1Shanghai Vision Mechanical Joint Co., Ltd. · Design
- Over-molded grommet for hose applications14 Jul 2026US 12,680,634 B2Cooper-Standard Automotive Inc.
- Clamp ring for fastening pipes2 Jun 2026US 12,644,543 B2Illinois Tool Works Inc.
- High pressure converter hose, high pressure connector assembly and methods of use2 Jun 2026US 12,644,544 B1Drug Careers Inc.
- Universal coupling2 Jun 2026US 12,644,545 B2Advanced Drainage Systems, Inc.
- Fluid adaptor24 Sep 2026US 2026/0287096 A1Ckd Solutions, LLC
- Tube swage process and system with rotatable tube joint17 Sep 2026US 2026/0276114 A1
- Pipe coupling with pipe connection rings13 Aug 2026US 2026/0235236 A1ASC Engineered Solutions, LLC
- Adaptor with relief gates6 Aug 2026US 2026/0227013 A1Cooper-Standard Automotive Inc.
- Method of rotating a pipeline section23 Jul 2026US 2026/0210463 A1Victaulic Company
Most cited
By later US patents
- Pipe coupling130US 4,417,755 AFamilian Corp. · 1983
- Deformable mechanical pipe coupling117US 7,086,131 B2Victaulic Company · 2006
- Mechanical pipe coupling having spacers113US 7,401,819 B2Victaulic Company · 2008
- Apparatus for connecting ducts with a self-sealing joint102US 3,955,834 AAktiebolaget Svenska Flaktfabriken · 1976
- Split fittings and pipeline systems using same98US 4,667,505 A1987