B24B 21/04
Machines or devices using grinding or polishing belts: for grinding plane surfaces
Official title: for grinding plane surfaces
B24B21/04 (Machines or devices using grinding or polishing belts: for grinding plane surfaces) appears on 549 US grants and 369 published applications in this corpus.
Search patents in B24B- Granted patents
- 549
- Published applications
- 369
- Assignees
- 215
- Inventors
- 820
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 8 | 0 |
| 1987 | 10 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 8 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 19 | 0 |
| 2000 | 20 | 0 |
| 2001 | 48 | 28 |
| 2002 | 50 | 48 |
| 2003 | 45 | 42 |
| 2004 | 52 | 41 |
| 2005 | 54 | 19 |
| 2006 | 31 | 12 |
| 2007 | 12 | 16 |
| 2008 | 11 | 10 |
| 2009 | 4 | 13 |
| 2010 | 7 | 4 |
| 2011 | 3 | 7 |
| 2012 | 4 | 6 |
| 2013 | 8 | 4 |
| 2014 | 3 | 10 |
| 2015 | 7 | 6 |
| 2016 | 8 | 8 |
| 2017 | 7 | 9 |
| 2018 | 12 | 11 |
| 2019 | 4 | 16 |
| 2020 | 6 | 14 |
| 2021 | 6 | 5 |
| 2022 | 8 | 5 |
| 2023 | 4 | 9 |
| 2024 | 6 | 8 |
| 2025 | 4 | 11 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Polishing apparatus and polishing method8 Sep 2026US 12,728,495 B2Ebara Corporation
- 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 apparatus, polishing method, and cleaning liquid supply device10 Mar 2026US 12,569,954 B2Meinan Machinery Works, Inc.
- Polishing method and polishing apparatus1 Oct 2026US 2026/0295763 A1Ebara Corporation
- Polishing head and polishing apparatus24 Sep 2026US 2026/0284822 A1Ebara Corporation
- Grinding belt unit for double-sided sheet metal processing6 Aug 2026US 2026/0225203 A1ARKU Maschinenbau GmbH
- File belt sander9 Jul 2026US 2026/0192416 A1Milwaukee Electric Tool Corporation
- Method for producing a structure on a surface30 Apr 2026US 2026/0115757 A1Hymmen GmbH Maschinen- und Anlagenbau
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
- Wafer polishing machine with fluid bearings151US 5,558,568 AOntrak Systems, Inc. · 1996
- Method of planarizing the upper surface of a semiconductor wafer146US 6,194,317 B13M Innovative Properties Company · 2001