C01B 25/235
Clarification
Official title: Clarification; Stabilisation to prevent post-precipitation of dissolved impurities
C01B25/235 (Clarification) appears on 67 US grants and 7 published applications in this corpus.
Search patents in C01B- Granted patents
- 67
- Published applications
- 7
- Assignees
- 29
- Inventors
- 95
- Latest grant
- 2 Apr 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 16 | 0 |
| 1982 | 6 | 0 |
| 1983 | 8 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 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 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Polymeric microparticles as filtration and/or clarifying aids in phosphoric acid production2 Apr 2019US 10,246,332 B2Cytec Industries Inc.
- Primary amine-containing polymers useful as scale inhibitors26 Feb 2019US 10,214,421 B2Cytec Industries Inc.
- Primary amine-containing polymers useful as scale inhibitors27 Feb 2018US 9,902,617 B2Cytec Industries Inc.
- Phosphoric acid production gypsum filtration flocculant pre-dilution (make down) with post-filtration phosphoric acid17 Nov 2015US 9,187,327 B2Nalco Company
- One-step oxidation of wet-process phosphoric acid28 Jun 2005US 6,911,191 B2Agrium U.S. Inc.
- Polymeric microparticles as filtration and/or clarifying aids in phosphoric acid production13 Jun 2019US 2019/0177164 A1Cytec Industries Inc.
- Primary amine-containing polymers useful as scale inhibitors28 Jun 2018US 2018/0179062 A1Cytec Industries Inc.
- Polymeric microparticles as filtration and/or clarifying aids in phosphoric acid production2 Mar 2017US 2017/0057822 A1Cytec Industries Inc.
- Primary amine-containing polymers useful as scale inhibitors13 Aug 2015US 2015/0225241 A1Cytec Industries Inc.
- Phosphoric acid production gypsum filtration flocculant pre-dilution (make down) with post-filtration phosphoric acid5 Jul 2012US 2012/0171099 A1Nalco Company
Most cited
By later US patents
- Production of stabilized wet process phosphoric acid25US 4,110,422 AW. R. Grace & Co. · 1978
- Stabilization of wet-process phosphoric acid16US 4,048,289 AFertilizantes Fosfatados Mexicanos, S.A. · 1977
- Purification of wet process phosphoric acid as a pretreatment step in the recovery of uranium15US 4,292,278 AWyoming Mineral Corporation · 1981
- Production of stabilized wet process phosphoric acid14US 4,164,550 AW. R. Grace & Co. · 1979
- Process for removing particulate impurities from aqueous phosphoric acid13US 4,443,421 AOccidental Chemical Corporation · 1984