C22B 19/34
Obtaining zinc oxide
Official title: Obtaining zinc oxide (purifying zinc oxide C01G9/02)
C22B19/34 (Obtaining zinc oxide) appears on 74 US grants and 52 published applications in this corpus.
Search patents in C22B- Granted patents
- 74
- Published applications
- 52
- Assignees
- 60
- Inventors
- 181
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 2 |
| 2002 | 4 | 1 |
| 2003 | 2 | 3 |
| 2004 | 5 | 1 |
| 2005 | 2 | 2 |
| 2006 | 0 | 2 |
| 2007 | 0 | 3 |
| 2008 | 0 | 1 |
| 2009 | 2 | 4 |
| 2010 | 4 | 4 |
| 2011 | 5 | 3 |
| 2012 | 3 | 0 |
| 2013 | 1 | 1 |
| 2014 | 1 | 4 |
| 2015 | 2 | 3 |
| 2016 | 5 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 2 | 2 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 3 |
| 2025 | 0 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing copper metal from copper concentrates without generating waste26 May 2026US 12,637,738 B2Universidad De Concepcion
- Method of removing volatile constituents from an industrial dust, and valuable material-containing product12 May 2026US 12,624,417 B2MontanuniversitäT Leoben
- Pyro-metallurgical process in a rotary kiln25 Jun 2024US 12,018,345 B2S. A. Lhoist Recherche et Developpement
- Method for the recovery of zinc9 Aug 2022US 11,408,054 B2Tata Steel Nederland Technology B.V.
- Oxygen injection in fluid bed ore concentrate roasting18 Aug 2020US 10,745,777 B2Praxair Technology, Inc.
- Zinc recovery method and zinc ferrite decomposition method6 Aug 2026US 2026/0226582 A1Kinotech Corporation
- Method for processing materials containing iron and zinc26 Feb 2026US 2026/0055480 A1Zincovery Process Technologies Limited
- Method of manufacturing aluminium deox, aluminium powder, and zinc oxide in a single batch process4 Dec 2025US 2025/0369070 A1BN Industries
- Method for processing materials containing iron and zinc18 Sep 2025US 2025/0290173 A1Zincovery Process Technologies Limited
- Method for processing zinc concentrates5 Jun 2025US 2025/0179611 A1Glencore Technology Pty Limited
Most cited
By later US patents
- Hydrometallurgical process for producing zinc oxide33US 5,441,712 ABHP Minerals International Inc. · 1995
- Process for recovering zinc from steel-making flue dust28US 4,071,357 AHazen Research, Inc. · 1978
- Production of zinc oxide from complex sulfide concentrates using chloride processing27US 6,395,242 B1Noranda Inc. · 2002
- Furnace dust recovery process24US 4,673,431 ABricmont & Associates, Inc. · 1987
- Process to selectively recover metals from waste dusts, sludges and ores22US 6,770,249 B12004