C01B 7/192
Preparation from fluorspar
Official title: {Preparation from fluorspar}
C01B7/192 (Preparation from fluorspar) appears on 32 US grants and 12 published applications in this corpus.
Search patents in C01B- Granted patents
- 32
- Published applications
- 12
- Assignees
- 24
- Inventors
- 82
- Latest grant
- 8 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 3 |
| 2003 | 0 | 1 |
| 2004 | 3 | 0 |
| 2005 | 2 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for producing hydrogen fluoride8 Aug 2023US 11,718,523 B2Daikin Industries, Ltd.
- Method for producing hydrogen fluoride2 Mar 2021US 10,934,166 B2Daikin Industries, Ltd.
- Method for the production of free flowing synthetic calcium fluoride and use thereof19 Sep 2017US 9,764,963 B23M Innovative Properties Company
- Method for producing hydrogen fluoride23 May 2017US 9,656,864 B2Daikin Industries, Ltd.
- Method for regulating water concentration in a process stream22 Feb 2005US 6,858,198 B2Honeywell International Inc.
- Method for producing hydrogen fluoride20 May 2021US 2021/0147230 A1Daikin Industries, Ltd.
- Method for producing hydrogen fluoride8 Jun 2017US 2017/0158506 A1Daikin Industries, Ltd.
- Method for the Production of Free Flowing Synthetic Calcium Fluoride and Use thereof10 Dec 2015US 2015/0353372 A13M Innovative Properties Company
- Method for producing hydrogen fluoride3 May 2012US 2012/0107223 A1Daikin Industries, Ltd.
- Preparation of hydrogen fluoride from fluorspar or calcium fluoride containing waste material25 Aug 2011US 2011/0206598 A1Solvay Fluor GmbH
Most cited
By later US patents
- Rotary tube reactor for the thermal treatment of material23US 4,353,874 ABayer Aktiengesellschaft · 1982
- Conversion of calcium compounds into solid and gaseous compounds13US 4,774,064 AMississippi Chemical Corporation · 1988
- Process for removing soluble fluoride from a waste solution containing the same12US 6,355,221 B1BP Corporation North America Inc. · 2002
- Process and device for manufacturing synthetic anhydrous calcium sulphate and pure hydrofluoric acid7US 4,460,551 ABuss AG · 1984
- Production of anhydrous hydrogen fluoride from low-grade metallic fluorides and sulfuric acid7US 4,477,425 AFlorida Progress Corporation · 1984