F27D 3/0033
Charging of particulate material
Official title: {charging of particulate material}
F27D3/0033 (Charging of particulate material) appears on 209 US grants and 184 published applications in this corpus.
Search patents in F27D- Granted patents
- 209
- Published applications
- 184
- Assignees
- 150
- Inventors
- 571
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 9 | 0 |
| 2000 | 4 | 0 |
| 2001 | 9 | 3 |
| 2002 | 6 | 4 |
| 2003 | 5 | 3 |
| 2004 | 4 | 7 |
| 2005 | 6 | 8 |
| 2006 | 3 | 8 |
| 2007 | 2 | 5 |
| 2008 | 3 | 10 |
| 2009 | 5 | 14 |
| 2010 | 13 | 9 |
| 2011 | 11 | 9 |
| 2012 | 8 | 5 |
| 2013 | 8 | 3 |
| 2014 | 4 | 5 |
| 2015 | 6 | 15 |
| 2016 | 2 | 20 |
| 2017 | 9 | 4 |
| 2018 | 9 | 8 |
| 2019 | 11 | 8 |
| 2020 | 8 | 5 |
| 2021 | 2 | 8 |
| 2022 | 4 | 4 |
| 2023 | 5 | 6 |
| 2024 | 8 | 6 |
| 2025 | 3 | 6 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for the commercial production of high-quality catalyst materials21 Apr 2026US 12,607,408 B2Greyrock Technology, LLC
- Carbon baking furnace6 Jan 2026US 12,516,885 B2Axaeon Enterprises AG
- Heat treatment system, saggar and method of heat-treating25 Nov 2025US 12,482,804 B2NGK Insulators, Ltd.
- Methods for preheating metal-containing pellets20 May 2025US 12,305,926 B2Air Products and Chemicals, Inc.
- Graphite purification system and method4 Feb 2025US 12,215,029 B2Urbix, Inc.
- Telescoping Ram and Methods for Its Use in Transferring Solid Material21 May 2026US 2026/0139904 A1Gti Energy
- Tundish flux feeding apparatus and method21 Aug 2025US 2025/0262661 A1HarbisonWalker International Holdings, Inc.
- Graphite Purification System and Method29 May 2025US 2025/0171314 A1Urbix, Inc.
- Device and method for the production of silicon carbide1 May 2025US 2025/0135425 A1The Yellow SiC Holding GmbH
- Iron recovery30 Jan 2025US 2025/0034666 A1
Most cited
By later US patents
- Method for making sintered abrasive grain118US 5,567,150 AMinnesota Mining and Manufacturing Company · 1996
- Apparatus for sintering abrasive grain54US 5,489,204 AMinnesota Mining and Manufacturing Company · 1996
- Method for producing reduced iron agglomerates38US 6,254,665 B1Kobe Steel, Ltd. · 2001
- Method for operating moving hearth reducing furnace37US 6,251,161 B1Kabushiki Kaisha Kobe Sieko Sho (Kobe Steel, Ltd.) · 2001
- Apparatus and procedures for replenishing particulate materials used in industrial processes36US 6,358,401 B1Intercat Equipment, Inc. · 2002