B24B 21/00
Machines or devices using grinding or polishing belts
Official title: Machines or devices using grinding or polishing belts (for sharpening cutting edges of tools B24B3/00; portable belt-grinding machines B24B23/06); Accessories therefor
B24B21/00 (Machines or devices using grinding or polishing belts) appears on 1,130 US grants and 766 published applications in this corpus.
Search patents in B24B- Granted patents
- 1,130
- Published applications
- 766
- Assignees
- 449
- Inventors
- 1,734
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 15 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 7 | 0 |
| 1981 | 12 | 0 |
| 1982 | 12 | 0 |
| 1983 | 9 | 0 |
| 1984 | 6 | 0 |
| 1985 | 12 | 0 |
| 1986 | 13 | 0 |
| 1987 | 18 | 0 |
| 1988 | 12 | 0 |
| 1989 | 10 | 0 |
| 1990 | 14 | 0 |
| 1991 | 12 | 0 |
| 1992 | 24 | 0 |
| 1993 | 22 | 0 |
| 1994 | 15 | 0 |
| 1995 | 19 | 0 |
| 1996 | 18 | 0 |
| 1997 | 18 | 0 |
| 1998 | 20 | 0 |
| 1999 | 40 | 0 |
| 2000 | 40 | 0 |
| 2001 | 63 | 37 |
| 2002 | 71 | 57 |
| 2003 | 65 | 58 |
| 2004 | 64 | 62 |
| 2005 | 68 | 31 |
| 2006 | 52 | 27 |
| 2007 | 24 | 40 |
| 2008 | 22 | 25 |
| 2009 | 9 | 37 |
| 2010 | 14 | 27 |
| 2011 | 18 | 23 |
| 2012 | 18 | 23 |
| 2013 | 20 | 14 |
| 2014 | 14 | 21 |
| 2015 | 24 | 23 |
| 2016 | 21 | 25 |
| 2017 | 25 | 29 |
| 2018 | 25 | 35 |
| 2019 | 26 | 35 |
| 2020 | 15 | 21 |
| 2021 | 14 | 18 |
| 2022 | 11 | 19 |
| 2023 | 12 | 17 |
| 2024 | 14 | 25 |
| 2025 | 14 | 23 |
| 2026 | 14 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B24B 21/04Machines or devices using grinding or polishing belts: for grinding plane surfaces549
- B24B 21/18Accessories247
- B24B 21/004Machines or devices using grinding or polishing belts: using abrasive rolled strips156
- B24B 21/002Machines or devices using grinding or polishing belts: for grinding edges or126
- B24B 21/02Machines or devices using grinding or polishing belts: for grinding rotationally symmetrical109
- B24B 21/16Machines or devices using grinding or polishing belts: for grinding other surfaces104
- B24B 21/008Machines comprising two or more tools or having several working posts62
- B24B 21/006Machines or devices using grinding or polishing belts: for special purposes42
Recent patents
- Polishing apparatus and polishing method8 Sep 2026US 12,728,495 B2Ebara Corporation
- Robotic polishing system and method for using same18 Aug 2026US 12,708,976 B2Pratt & Whitney Canada Corp.
- Method for operating a grinding device and a grinding device30 Jun 2026US 12,667,932 B2Karl Heesemann Maschinenfabrik GmbH & Co. KG
- File belt sander9 Jun 2026US 12,649,211 B2Milwaukee Electric Tool Corporation
- Pressing element for a grinding belt, with cooling12 May 2026US 12,623,314 B2Hülsemann
- Polishing method and polishing apparatus1 Oct 2026US 2026/0295763 A1Ebara Corporation
- Polishing head and polishing apparatus24 Sep 2026US 2026/0284822 A1Ebara Corporation
- Polishing device13 Aug 2026US 2026/0233358 A1Ebara Corporation
- Grinding belt unit for double-sided sheet metal processing6 Aug 2026US 2026/0225203 A1ARKU Maschinenbau GmbH
- Abrasive articles, methods of manufacture and use thereof23 Jul 2026US 2026/0208320 A13M Innovative Properties Company
Most cited
By later US patents
- Method of modifying an exposed surface of a semiconductor wafer335US 5,958,794 AMinnesota Mining and Manufacturing Company · 1999
- Apparatus and method for polishing a flat surface using a belted polishing pad264US 6,059,643 AAplex, Inc. · 2000
- Linear polisher and method for semiconductor wafer planarization187US 5,692,947 AOntrak Systems, Inc. · 1997
- Method and apparatus for mechanical and chemical-mechanical planarization of microelectronic-device substrate assemblies182US 6,039,633 AMicron Technology, Inc. · 2000
- Method and apparatus for controlling planarizing characteristics in mechanical and chemical-mechanical planarization of microelectronic substrates166US 5,997,384 AMicron Technology, Inc. · 1999