F16L 47/03
Welded joints with an electrical resistance incorporated in the joint
F16L47/03 (Welded joints with an electrical resistance incorporated in the joint) appears on 270 US grants and 183 published applications in this corpus.
Search patents in F16L- Granted patents
- 270
- Published applications
- 183
- Assignees
- 165
- Inventors
- 427
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 12 | 0 |
| 1991 | 2 | 0 |
| 1992 | 12 | 0 |
| 1993 | 7 | 0 |
| 1994 | 11 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 8 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 8 | 1 |
| 2002 | 11 | 6 |
| 2003 | 2 | 7 |
| 2004 | 4 | 2 |
| 2005 | 6 | 6 |
| 2006 | 3 | 7 |
| 2007 | 1 | 8 |
| 2008 | 1 | 6 |
| 2009 | 3 | 4 |
| 2010 | 3 | 10 |
| 2011 | 0 | 3 |
| 2012 | 3 | 5 |
| 2013 | 5 | 16 |
| 2014 | 4 | 5 |
| 2015 | 5 | 11 |
| 2016 | 11 | 15 |
| 2017 | 5 | 8 |
| 2018 | 8 | 8 |
| 2019 | 12 | 13 |
| 2020 | 10 | 4 |
| 2021 | 4 | 5 |
| 2022 | 3 | 9 |
| 2023 | 10 | 5 |
| 2024 | 8 | 11 |
| 2025 | 7 | 2 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Double containment fittings with fusion coils1 Sep 2026US 12,723,693 B1K.D.W. Company Limited
- Monitoring of lined pipeline31 Mar 2026US 12,590,665 B2Pioneer Lining Technology Limited
- Electrofusion joint and fusion method4 Nov 2025US 12,459,212 B2Sekisui Chemical Co., Ltd.
- Hybrid electrofusion processor17 Jun 2025US 12,330,380 B2Georg Fischer Central Plastics LLC
- Corrosion-free welded connection for reinforced thermoplastic pipes (RTP)15 Apr 2025US 12,276,358 B2Saudi Arabian Oil Company
- Methods and systems for connecting pipes6 Aug 2026US 2026/0227011 A1Saudi Arabian Oil Company
- Pipe, pipe connection and pipeline system11 Jun 2026US 2026/0160362 A1Core Linepipe Inc.
- Pipe Fitting with Fusible Sleeve14 May 2026US 2026/0132871 A1Ipex Technologies Inc.
- Egg-shaped pipe that is easy to connect and disconnect23 Apr 2026US 2026/0110375 A1Shinwoo Ind. Co., Ltd.
- Reinforced thermoplastic based welded jointing system and method for thermoset composite pipe joints5 Mar 2026US 2026/0063232 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Pipe fittings108US 6,406,063 B1Fina Research, S. A. · 2002
- Method of coupling plastic pipes by welding and a connection piece for coupling same55US 4,176,274 APont-A-Mousson S. A. · 1979
- Coupling for tubular plastic pipes with liner of socket and liner of pipes being heat weldable54US 5,364,130 AStreng Plastic AG · 1994
- Pipes base on polyolefin resin for manufacturing pipelines and couplings for assembling them52US 4,927,184 AAtochem · 1990
- Electrofusion joint and hot water supply header using the same51US 5,150,922 AMitsui Petrochemical Ind., Ltd. · 1992