B29L 2023/22
Tubes or pipes, i.e. rigid
Official title: {Tubes or pipes, i.e. rigid (bent tubes not for use as pipe couplings B29L2023/004)}
B29L2023/22 (Tubes or pipes, i.e. rigid) appears on 1,484 US grants and 1,310 published applications in this corpus.
Search patents in B29L- Granted patents
- 1,484
- Published applications
- 1,310
- Assignees
- 981
- Inventors
- 3,147
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 20 | 0 |
| 1978 | 22 | 0 |
| 1979 | 13 | 0 |
| 1980 | 18 | 0 |
| 1981 | 19 | 0 |
| 1982 | 21 | 0 |
| 1983 | 14 | 0 |
| 1984 | 19 | 0 |
| 1985 | 12 | 0 |
| 1986 | 16 | 0 |
| 1987 | 15 | 0 |
| 1988 | 19 | 0 |
| 1989 | 17 | 0 |
| 1990 | 32 | 0 |
| 1991 | 26 | 0 |
| 1992 | 29 | 0 |
| 1993 | 38 | 0 |
| 1994 | 25 | 0 |
| 1995 | 27 | 0 |
| 1996 | 33 | 0 |
| 1997 | 25 | 0 |
| 1998 | 35 | 0 |
| 1999 | 20 | 0 |
| 2000 | 22 | 0 |
| 2001 | 27 | 2 |
| 2002 | 18 | 18 |
| 2003 | 27 | 27 |
| 2004 | 13 | 22 |
| 2005 | 17 | 29 |
| 2006 | 14 | 33 |
| 2007 | 9 | 38 |
| 2008 | 13 | 41 |
| 2009 | 8 | 27 |
| 2010 | 22 | 37 |
| 2011 | 17 | 29 |
| 2012 | 27 | 33 |
| 2013 | 26 | 44 |
| 2014 | 32 | 40 |
| 2015 | 29 | 82 |
| 2016 | 44 | 95 |
| 2017 | 39 | 96 |
| 2018 | 73 | 101 |
| 2019 | 99 | 92 |
| 2020 | 71 | 69 |
| 2021 | 67 | 76 |
| 2022 | 56 | 83 |
| 2023 | 57 | 46 |
| 2024 | 46 | 58 |
| 2025 | 46 | 53 |
| 2026 | 29 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and machine for belling PVC-O pipes6 Oct 2026US 12,752,475 B2Sica S.P.A.
- Axial reinforcement filament application methodology6 Oct 2026US 12,752,500 B2Safeguard LLC
- Constant strain PEX expansion tool head1 Sep 2026US 12,722,338 B2Zurn Water, LLC
- Apparatus and method for cutting a thermoplastic pipe18 Aug 2026US 12,709,039 B2Sica S.P.A.
- Device, system and method for curing a tube liner18 Aug 2026US 12,709,045 B2Per Aarsleff A/S
- On- and offshore long-chain polyamide tube with increased barrier effect1 Oct 2026US 2026/0295917 A1Evonik Operations GmbH
- Polyamide composition and polar graphene1 Oct 2026US 2026/0297326 A1Arkema France
- Coextruded tubing and methods of manufacturing the same1 Oct 2026US 2026/0298376 A1
- Pex expansion tool17 Sep 2026US 2026/0273609 A1Milwaukee Electric Tool Corporation
- Three-layer composite pipe and preparation method thereof17 Sep 2026US 2026/0273825 A1Orinko Advanced Plastics Co., Ltd
Most cited
By later US patents
- Automated continuous and random access analytical system248US 5,358,691 AAbbott Laboratories · 1994
- Scheduling operation of an automated analytical system230US 5,646,049 AAbbott Laboratories · 1997
- Method for making a tubular product, especially a catheter, and article made thereby168US 6,017,335 A2000
- Sterile connection process, apparatus and system156US 4,610,670 AE. I. Du Pont de Nemours and Company · 1986
- Automated continuous and random access analytical system131US 5,482,861 AAbbott Laboratories · 1996