D21C 3/16
Nitrogen oxides
Official title: nitrogen oxides; nitric acid {nitrates, nitrites}
D21C3/16 (Nitrogen oxides) appears on 7 US grants and 6 published applications in this corpus.
Search patents in D21C- Granted patents
- 7
- Published applications
- 6
- Assignees
- 8
- Inventors
- 29
- Latest grant
- 25 Oct 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Fiber production with supercritical fluid phase from cotton straw25 Oct 2022US 11,479,913 B2
- Drying/transportation and releasing MFC16 Mar 2021US 10,947,670 B2Stora Enso OYJ
- Method for production of pulp18 Sep 2012US 8,268,124 B2Kabushiki Kaisha Toa Kogyo
- Pulping process employing nascent oxygen23 Jun 1998US 5,770,010 AR-J Holding Company
- Delignification of cellulosic raw materials using acetic acid, nitric acid and ozone31 Jan 1995US 5,385,641 AAcetocell GmbH & Co. KG
- Fiber production with supercritical fluid phase from cotton straw10 Jun 2021US 2021/0172117 A1Veritas Tekstil Konfeksiyon Pazarlama Sanayi Ve Ticaret Anonim Sirketi
- Drying/transportation and releasing mfc2 May 2019US 2019/0127911 A1Stora Enso OYJ
- Water-soluble regenerated fiber production from calluna vulgaris plant species24 Jan 2019US 2019/0024307 A1Veritas Tekstil Konfeksiyon Pazarlama Sanayi Ve Ticaret Anonim Sirketi
- Method for preparation of cellulose nanocrystals and nanofibrils13 Apr 2017US 2017/0101738 A1
- Process for isolating cellulose from cellulosic biomass, isolated cellulose of type i and composite materials comprising same17 Dec 2015US 2015/0361616 A1Ventix Environnement Inc.
Most cited
By later US patents
- Pulping of lignocellulosic material by sequential treatment thereof with nitric oxide and oxygen22US 4,076,579 AThe Regents of the University of California · 1978
- Pulping process employing nascent oxygen14US 5,770,010 AR-J Holding Company · 1998
- Delignification of cellulosic raw materials using acetic acid, nitric acid and ozone2US 5,385,641 AAcetocell GmbH & Co. KG · 1995