C01B 25/328
Defluorination during or after the preparation
Official title: {Defluorination during or after the preparation}
C01B25/328 (Defluorination during or after the preparation) appears on 17 US grants and 3 published applications in this corpus.
Search patents in C01B- Granted patents
- 17
- Published applications
- 3
- Assignees
- 11
- Inventors
- 30
- Latest grant
- 1 Aug 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method of converting limestone into tri-calcium phosphate and tetra-calcium phosphate powder simultaneously1 Aug 2017US 9,718,687 B2SIRIM Berhad
- Production of dicalcium phosphate or monocalcium phosphate5 Sep 2006US 7,101,522 B2
- Defluorination kiln restriction control agent and method29 Dec 1987US 4,716,026 AInternational Minerals & Chemical Corp.
- Method for preparation of defluorinated phosphate16 Jun 1987US 4,673,555 A
- Process for the production of dicalcium phosphate18 Jun 1985US 4,524,054 ACommonwealth Scientific and Industrial Research Organization
- Method of converting limestone into tri-calcium phosphate and tetra-calcium phosphate powder simultaneously21 Nov 2013US 2013/0309308 A1SIRIM Berhad
- Process for treating pond water2 Jun 2011US 2011/0127223 A1Veolia Water North America Operating Services, LLC
- Production of dicalcium phosphate or monocalcium phosphate28 Aug 2003US 2003/0161778 A1
Most cited
By later US patents
- Recovery of calcium fluoride from phosphate operation waste water25US 4,171,342 AOccidental Chemical Corporation · 1979
- Production of fluoride-free phosphates8US 4,086,322 APennzoil Company · 1978
- Production of fluoride-free phosphates8US 4,222,990 APennzoil Company · 1980
- Defluorinated phosphate rock process using lime5US 4,101,636 AOlin Corporation · 1978
- Use of oil-water emulsions in a hydrothermal process4US 4,151,259 ABorden, Inc. · 1979