B21C 23/147
Making drill blanks
Official title: {Making drill blanks}
B21C23/147 (Making drill blanks) appears on 25 US grants and 16 published applications in this corpus.
Search patents in B21C- Granted patents
- 25
- Published applications
- 16
- Assignees
- 19
- Inventors
- 50
- Latest grant
- 23 May 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
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| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
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| 1995 | 1 | 0 |
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| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 3 |
| 2006 | 2 | 2 |
| 2007 | 2 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
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| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 2 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing a blank from extrusion material, and extruder23 May 2023US 11,654,465 B2Kennametal Inc.
- Method for producing a cutting head31 Jan 2023US 11,565,356 B2Kennametal Inc.
- Blank and tool with cooling channels7 Apr 2015US 8,998,543 B2Guehring Ohg
- Cutting tool and a process for making such a cutting tool25 Mar 2014US 8,678,072 B2Iscar, Ltd.
- Method and apparatus for manufacturing a blank for a rotary cutting tool13 May 2008US 7,371,344 B2Seco Tools AB
- Drilling tool, blank for drilling tool, and method for manufacturing blank for drilling tool11 Jun 2026US 2026/0158563 A1Osg Corporation
- Method and device for producing a cylindrical body22 Oct 2020US 2020/0331184 A1Arno Friedrichs Hartmetall GmbH & Co. KG
- Method for Producing a Blank from Extrusion Material, and Extruder29 Aug 2019US 2019/0262879 A1Kennametal Inc.
- Method for producing a cutting head, and cutting head17 Jan 2019US 2019/0015939 A1Kennametal Inc.
- Round tool blank and method and device for making the same30 May 2013US 2013/0136550 A1Sandvik Intellectual Property AB
Most cited
By later US patents
- Method of making a sintered body having an internal channel73US 4,881,431 AFried. Krupp Gesellscahft mit beschrankter Haftung · 1989
- Extrusion tool for producing hard-metal or ceramic drill blank46US 4,779,440 AFried. Krupp Gesellschaft mit beschraenkter Haftung · 1988
- Extrusion tool for producing a hard metal rod or a ceramic rod with twisted internal boreholes43US 5,438,858 AGottlieb Guhring KG · 1995
- Extrusion process and tool for the production of a blank having internal bores42US 5,116,659 ASchwarzkopf Development Corporation · 1992
- Drilling tool formed of a core-and-casing assembly41US 4,813,823 AFried. Krupp Gesellschaft mit beschrankter Haftung · 1989