B21C 37/28
Making tube fittings for connecting pipes
Official title: Making tube fittings for connecting pipes, e.g. U-pieces
B21C37/28 (Making tube fittings for connecting pipes) appears on 239 US grants and 96 published applications in this corpus.
Search patents in B21C- Granted patents
- 239
- Published applications
- 96
- Assignees
- 173
- Inventors
- 446
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 10 | 0 |
| 1978 | 8 | 0 |
| 1979 | 11 | 0 |
| 1980 | 9 | 0 |
| 1981 | 8 | 0 |
| 1982 | 4 | 0 |
| 1983 | 7 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 8 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 7 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 11 | 0 |
| 2000 | 14 | 0 |
| 2001 | 10 | 3 |
| 2002 | 8 | 6 |
| 2003 | 7 | 5 |
| 2004 | 3 | 6 |
| 2005 | 10 | 13 |
| 2006 | 5 | 3 |
| 2007 | 1 | 1 |
| 2008 | 4 | 4 |
| 2009 | 0 | 2 |
| 2010 | 2 | 2 |
| 2011 | 2 | 2 |
| 2012 | 2 | 6 |
| 2013 | 2 | 4 |
| 2014 | 2 | 3 |
| 2015 | 2 | 6 |
| 2016 | 3 | 3 |
| 2017 | 5 | 1 |
| 2018 | 3 | 3 |
| 2019 | 1 | 2 |
| 2020 | 1 | 2 |
| 2021 | 2 | 3 |
| 2022 | 3 | 4 |
| 2023 | 5 | 3 |
| 2024 | 0 | 4 |
| 2025 | 7 | 3 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and device for perforating a pipe wall25 Aug 2026US 12,715,029 B2T-Drill Oy
- Additive manufacturing of multilayered structures16 Jun 2026US 12,654,417 B2FMC Technologies, Inc.
- Stainless steel spray boom for aerial spraying16 Sep 2025US 12,415,192 B2Texas Transland LLC
- Apparatus and method for production of duct members19 Aug 2025US 12,392,524 B2Cleveland Tool & Machine, Inc.
- Tee type connector pipe manufacturing method5 Aug 2025US 12,377,456 B2
- Friction drilled spray header16 Apr 2026US 2026/0102780 A1
- Stainless Steel Spray Boom for Aerial Spraying1 Jan 2026US 2026/0001089 A1Texas Transland LLC
- Additive manufacturing of multilayered structures23 Oct 2025US 2025/0326197 A1FMC Technologies, Inc.
- Workpiece processing method, machine tool, and non-transitory computer-readable recording medium25 Sep 2025US 2025/0296176 A1Yamazaki Mazak Corporation
- Method and device for making a t-branch for pipes25 Sep 2025US 2025/0297701 A1T-Drill Oy
Most cited
By later US patents
- Deformable member175US 6,896,049 B2Zeroth Technology Ltd. · 2005
- Preperforated coiled tubing85US 5,526,881 AQuality Tubing, Inc. · 1996
- Compressible fitting and associated method52US 5,090,743 AMannesmann Aktiengesellschaft · 1992
- Reinforcement for vehicle hollow structural member, having decreasing-thickness end portions50US 6,082,811 AKyoho Machine Works, Ltd. · 2000
- Framework with hollow members process for producing the same and its use47US 5,794,398 A1998