B01F 27/726
With two helices with opposite pitch on the same shaft
Official title: with two helices with opposite pitch on the same shaft; with two helices on the same axis, driven in opposite directions or at different speeds
B01F27/726 (With two helices with opposite pitch on the same shaft) appears on 60 US grants and 41 published applications in this corpus.
Search patents in B01F- Granted patents
- 60
- Published applications
- 41
- Assignees
- 47
- Inventors
- 121
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 2 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 0 | 0 |
| 2017 | 0 | 3 |
| 2018 | 2 | 2 |
| 2019 | 1 | 3 |
| 2020 | 3 | 6 |
| 2021 | 4 | 2 |
| 2022 | 2 | 1 |
| 2023 | 2 | 3 |
| 2024 | 0 | 2 |
| 2025 | 4 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Apparatus to cool particulate matter for grinding68US 4,428,535 ALiquid Carbonic Corporation · 1984
- Granita production machine54US 4,900,158 AUgolini S.p.A. · 1990
- Oilfield material mixing and metering system with auger49US 9,909,398 B2Schlumberger Technology Corporation · 2018
- Concrete mixing system with cement/water premixer45US 5,352,035 AHydromix, Inc. · 1994
- Hay processing system for a mixer feeder45US 5,622,323 AGehl Company · 1997