G01J 3/40
Measuring the intensity of spectral lines by determining density of a photograph
Official title: Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography (G01J3/42, G01J3/44 take precedence)
G01J3/40 (Measuring the intensity of spectral lines by determining density of a photograph) appears on 42 US grants and 53 published applications in this corpus.
Search patents in G01J- Granted patents
- 42
- Published applications
- 53
- Assignees
- 36
- Inventors
- 113
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 3 |
| 2015 | 3 | 2 |
| 2016 | 3 | 2 |
| 2017 | 1 | 2 |
| 2018 | 2 | 2 |
| 2019 | 4 | 9 |
| 2020 | 4 | 5 |
| 2021 | 4 | 4 |
| 2022 | 2 | 3 |
| 2023 | 2 | 5 |
| 2024 | 3 | 6 |
| 2025 | 4 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Planar waveguide spectrograph46US 5,493,393 AThe Boeing Company · 1996
- Spectroanalytical systems14US 5,088,823 AThermo Jarrell Ash Corporation · 1992
- Hyperspectral imaging for detection of Parkinson's disease9US 10,098,540 B2Regents of the University of Minnesota · 2018
- XPS and Raman sample analysis system and method9US 10,816,476 B2Thermo Electron Scientific Instruments LLC · 2020
- Spectrometer apparatus for self-calibrating color imaging apparatus7US 4,898,467 AEastman Kodak Company · 1990