B65G 33/08
Screw or rotary spiral conveyors: for fluent solid materials
Official title: for fluent solid materials
B65G33/08 (Screw or rotary spiral conveyors: for fluent solid materials) appears on 406 US grants and 423 published applications in this corpus.
Search patents in B65G- Granted patents
- 406
- Published applications
- 423
- Assignees
- 306
- Inventors
- 808
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 1 |
| 2002 | 1 | 5 |
| 2003 | 1 | 5 |
| 2004 | 6 | 6 |
| 2005 | 3 | 5 |
| 2006 | 3 | 3 |
| 2007 | 5 | 4 |
| 2008 | 3 | 5 |
| 2009 | 2 | 7 |
| 2010 | 2 | 9 |
| 2011 | 5 | 7 |
| 2012 | 6 | 12 |
| 2013 | 11 | 18 |
| 2014 | 13 | 25 |
| 2015 | 23 | 21 |
| 2016 | 16 | 25 |
| 2017 | 31 | 38 |
| 2018 | 30 | 29 |
| 2019 | 29 | 22 |
| 2020 | 24 | 35 |
| 2021 | 26 | 36 |
| 2022 | 20 | 26 |
| 2023 | 25 | 23 |
| 2024 | 30 | 25 |
| 2025 | 18 | 18 |
| 2026 | 12 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Wellsite proppant storage and transport systems and methods25 Aug 2026US 12,715,704 B1Atlas Sand Company, LLC
- Device for transferring a solid material with endless screw and removable anti-rotation device18 Aug 2026US 12,709,485 B2Rouages
- Powder feeding device4 Aug 2026US 12,698,160 B2SK On Co., Ltd.
- Waterless grease cooling system14 Jul 2026US 12,680,764 B2Wavetek Process Technology, LLC
- Containerized system for mixing dry additives with bulk material30 Jun 2026US 12,667,815 B2Halliburton Energy Services.Inc.
- Cryogenic auger assembly8 Oct 2026US 2026/0309397 A1
- Pre-depolymerization Hollow Shaft Feed Screw1 Oct 2026US 2026/0296794 A1
- Screw housing and plug screw feeder1 Oct 2026US 2026/0297847 A1Valmet Corporation
- Modular rotating drum type conveying system10 Sep 2026US 2026/0264997 A1
- Method for calculating control parameter for powder and/or granule feeding apparatus and the powder and/or granule feeding apparatus13 Aug 2026US 2026/0233953 A1Kubota Corporation
Most cited
By later US patents
- Metering apparatus for pourable bulk material53US 6,318,418 B1Robert Bosch GmbH · 2001
- Devices which comprise a helical spring used as conveying, extracting, quantity-controlling or mixing means51US 4,496,086 APari-Symac · 1985
- Feeding of a pressurised device with variable grain sizing solid47US 7,469,781 B2Commissariat A L' Energie Atomique · 2008
- Screw feeder with multiple concentric flights46US 5,524,796 AHyer Industries, Inc. · 1996
- Silo bag packing machine38US 4,567,820 A1986