B21B 19/06
Rolling hollow basic material
Official title: Rolling hollow basic material, {e.g. Assel mills}(B21B19/04 takes precedence; separating work from mandrel B21C45/00)
B21B19/06 (Rolling hollow basic material) appears on 73 US grants and 40 published applications in this corpus.
Search patents in B21B- Granted patents
- 73
- Published applications
- 40
- Assignees
- 37
- Inventors
- 147
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 3 |
| 2005 | 3 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 1 | 3 |
| 2013 | 2 | 2 |
| 2014 | 1 | 3 |
| 2015 | 1 | 3 |
| 2016 | 2 | 2 |
| 2017 | 2 | 1 |
| 2018 | 1 | 2 |
| 2019 | 3 | 0 |
| 2020 | 0 | 2 |
| 2021 | 4 | 2 |
| 2022 | 3 | 4 |
| 2023 | 1 | 4 |
| 2024 | 3 | 0 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Anti-collapse oil casing with high strength and manufacturing method therefor5 May 2026US 12,617,007 B2Baoshan Iron & Steel Co., Ltd.
- Metallic tubular products with enhanced collapse resistance15 Jul 2025US 12,358,038 B2United States Steel Corporation
- Rolling mill for diameter reducing rolling and method for manufacturing strip material8 Apr 2025US 12,269,079 B2Jfe Steel Corporation
- Skew rolling apparatus, method for manufacturing seamless pipe shell, and method for manufacturing seamless steel pipe24 Dec 2024US 12,172,202 B2Jfe Steel Corporation
- Seamless pipe and method for manufacturing same12 Nov 2024US 12,140,265 B2Jfe Steel Corporation
- Anti-Collapse Oil Casing with High Strength and Manufacturing Method Therefor6 Jul 2023US 2023/0211396 A1Baoshan Iron & Steel Co., Ltd.
- Skew rolling apparatus, method for manufacturing seamless pipe shell, and method for manufacturing seamless steel pipe15 Jun 2023US 2023/0182185 A1Jfe Steel Corporation
- Seamless pipe and method for manufacturing same16 Mar 2023US 2023/0079996 A1Jfe Steel Corporation
- Method for producing seamless metal tube23 Feb 2023US 2023/0054014 A1Nippon Steel Corporation
- Rolling mill for diameter reducing rolling and method for manufacturing strip material8 Dec 2022US 2022/0388048 A1Jfe Steel Corporation
Most cited
By later US patents
- Smoothing rolling mill21US 4,175,414 AVallourec (Usines a Tubes de Lorraine-Escaut et Vallourec Reunies) · 1979
- Electrical control arrangement for a rolling mill drive motor of a rolling mill15US 4,578,626 ASiemens Aktiengesellschaft · 1986
- Methods and apparatus for manufacturing seamless tube14US 4,928,507 AKocks Technik GmbH & Co. · 1990
- Method of manufacturing bi-metallic tubing9US 5,259,547 AImperial Chemical Industries PLC · 1993
- Method for calibration of assel rollers9US 5,649,440 AMannesmann Aktiengesellschaft · 1997