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B01D 21/12

With moving scrapers

Official title: {with moving scrapers}

B01D21/12 (With moving scrapers) appears on 69 US grants and 18 published applications in this corpus.

Search patents in B01D

Granted patents: 69
Published applications: 18
Assignees: 50
Inventors: 138
Latest grant: 29 Nov 2022

Filings by year

B01D 21/12: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	8	0
1977	10	0
1978	3	0
1979	3	0
1980	4	0
1981	2	0
1982	1	0
1983	3	0
1984	3	0
1985	2	0
1986	3	0
1987	3	0
1988	3	0
1989	2	0
1990	0	0
1991	1	0
1992	0	0
1993	0	0
1994	0	0
1995	2	0
1996	0	0
1997	0	0
1998	2	0
1999	1	0
2000	1	0
2001	0	0
2002	1	1
2003	2	0
2004	0	0
2005	0	1
2006	2	1
2007	0	1
2008	0	0
2009	0	0
2010	0	0
2011	0	1
2012	0	0
2013	0	1
2014	0	0
2015	0	1
2016	0	1
2017	0	0
2018	0	1
2019	0	0
2020	2	2
2021	1	4
2022	4	0
2023	0	1
2024	0	2

By publication year. Applications have been published since 2001.

Subgroups

Granted patents

B01D 21/14With rotating scrapers49

Recent patents

Clarifier rake configuration and system and method including the same for bottom ash handling related to flue gas desulfurization29 Nov 2022US 11,511,216 B2United Conveyor Corporation
Apparatus, systems, and methods for improving slop water treatment efficiency2 Aug 2022US 11,401,171 B2Halliburton Energy Services.Inc.
Method and arrangement for controlling a dewatering process18 Jan 2022US 11,224,829 B2Outotec (Finland) Oy
System for monitoring operation of thickeners and clarifiers11 Jan 2022US 11,220,444 B2Ovivo Inc.
Clarifier rake configuration and system and method including the same for bottom ash handling related to flue gas desulfurization13 Apr 2021US 10,974,175 B2United Conveyor Corporation

Most cited

By later US patents