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C01B 21/0728

After-treatment

Official title: {After-treatment, e.g. grinding, purification}

C01B21/0728 (After-treatment) appears on 43 US grants and 39 published applications in this corpus.

Search patents in C01B

Granted patents: 43
Published applications: 39
Assignees: 31
Inventors: 153
Latest grant: 6 Jan 2026

Filings by year

C01B 21/0728: granted patents and published applications per publication year
Year	Granted patents	Published applications
1990	2	0
1991	0	0
1992	0	0
1993	5	0
1994	1	0
1995	4	0
1996	3	0
1997	2	0
1998	0	0
1999	1	0
2000	2	0
2001	0	0
2002	0	0
2003	0	1
2004	0	0
2005	0	0
2006	0	1
2007	1	0
2008	0	0
2009	0	0
2010	0	0
2011	0	0
2012	0	0
2013	1	2
2014	1	2
2015	0	3
2016	2	0
2017	0	2
2018	1	1
2019	1	6
2020	2	5
2021	2	4
2022	4	2
2023	1	4
2024	3	2
2025	3	2
2026	1	2

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

Recent patents

Aluminum nitride structure and method for producing same6 Jan 2026US 12,515,995 B2Panasonic Intellectual Property Management Co., Ltd.
Manufacturing method of modified aluminum nitride raw material, modified aluminum nitride raw material, manufacturing method of aluminum nitride crystals, and downfall defect prevention method26 Aug 2025US 12,398,038 B2Kwansei Gakuin Educational Foundation
Method for producing silicon-containing oxide-coated aluminum nitride particles and method for producing exoergic resin composition29 Jul 2025US 12,371,570 B2Resonac Corporation
Aluminum nitride-based powder and method for producing same22 Apr 2025US 12,281,010 B2Toyo Aluminium Kabushiki Kaisha
Silicon-containing oxide-coated aluminum nitride particle and method of manufacturing the same12 Nov 2024US 12,139,618 B2Resonac Corporation

Most cited

By later US patents