G01N 31/002
Determining nitrogen by transformation into ammonia
Official title: {Determining nitrogen by transformation into ammonia, e.g. KJELDAHL method}
G01N31/002 (Determining nitrogen by transformation into ammonia) appears on 13 US grants and 6 published applications in this corpus.
Search patents in G01N- Granted patents
- 13
- Published applications
- 6
- Assignees
- 13
- Inventors
- 32
- Latest grant
- 8 Feb 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 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 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for precisely determining protein content in edible fungus8 Feb 2022US 11,243,146 B2Nanjing University of Finance & Economics
- Sensitive detection of urea and related compounds in water16 Feb 2010US 7,662,637 B2GE Analytical Instruments
- Method and apparatus for determining urea concentration26 Dec 2006US 7,153,693 B2Toyo Engineering Corporation
- Process for determination of nitrogen11 Sep 2001US 6,287,868 B1Foss Tecator AB
- Microwave-based Kjeldahl method7 Aug 1990US 4,946,797 ACEM Corporation
- Reducing member, analysis device, and analysis method14 Nov 2024US 2024/0377372 A1Bl Tec K.K.
- Method for precisely determining protein content in edible fungus2 Apr 2020US 2020/0103319 A1Nanjing University of Finance & Economics
- Automatic Ammonium Analyzer3 Mar 2016US 2016/0061791 A1Endress+Hauser Conducta Gesellschaft Fur Mess-Und Regeltechnik Mbh+Co.KG
- Method and apparatus for titration7 Jan 2016US 2016/0003750 A1Opsis AB
- Sensitive detection of urea and related compounds in water19 May 2005US 2005/0106650 A1GE Analytical Instruments
Most cited
By later US patents
- Digestion apparatus useful for a kjeldahl method32US 4,882,286 ACEM Corporation · 1989
- Method and apparatus for determining urea concentration32US 7,153,693 B2Toyo Engineering Corporation · 2006
- Microwave-based apparatus and Kjeldahl method23US 4,861,556 ACEM Corporation · 1989
- Microwave-based Kjeldahl method23US 4,946,797 ACEM Corporation · 1990
- Apparatus for determining small amounts of nitrogen18US 4,081,345 AMax-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V. · 1978