C23G 3/04
Apparatus for cleaning or pickling metallic material: for cleaning pipes
Official title: for cleaning pipes
C23G3/04 (Apparatus for cleaning or pickling metallic material: for cleaning pipes) appears on 32 US grants and 18 published applications in this corpus.
Search patents in C23G- Granted patents
- 32
- Published applications
- 18
- Assignees
- 22
- Inventors
- 82
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 3 | 3 |
| 2022 | 1 | 5 |
| 2023 | 1 | 2 |
| 2024 | 0 | 1 |
| 2025 | 4 | 3 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cylinder processing device8 Sep 2026US 12,729,445 B2FHM Investments Ltd
- Hybrid descaling system with acid injection26 May 2026US 12,637,775 B2Saudi Arabian Oil Company
- Method of chemically cleaning pipework systems12 May 2026US 12,624,459 B2
- System for unblocking or cleaning ducts by means of a controlled local reaction19 Aug 2025US 12,390,841 B2Petroleo Brasileiro S.A. - Petrobras
- Martensitic stainless steel pipe and method of manufacturing the same1 Jul 2025US 12,344,940 B2Nippon Steel Corporation
- Phosphate-free and chlorine-free powder composition18 Jun 2026US 2026/0167904 A1Dempa Holdings Ltd
- Hybrid descaling system with acid injection2 Oct 2025US 2025/0305153 A1Saudi Arabian Oil Company
- Hybrid tool assembly for pipeline descaling28 Aug 2025US 2025/0270709 A1Saudi Arabian Oil Company
- Method for Treating and Protecting Equipment Using Nanoparticle Compositions31 Jul 2025US 2025/0243399 A1Pig Sweep, LLC
- Cylinder processing device8 Aug 2024US 2024/0263316 A1FHM Investments Ltd
Most cited
By later US patents
- Pipe system cleaning and in-line treatment of spent cleaning solution34US 5,800,629 AH.E.R.C. Products Incorporated · 1998
- Method for internal washing or cleaning and rinsing or drying of tubular materials17US 4,333,773 A1982
- Installation for internal cleaning of tubes13US 4,422,210 AGoteborgs Maskinkonsult Aktiebolag · 1983
- Process for etching inner surface of pipe or tube11US 4,056,428 AKobe Steel, Ltd. · 1977
- Apparatus for conveying tubular materials in pickling facilities of the same11US 4,392,506 AKabushiki Kaisha Kobe Seiko Sho · 1983