H01J 40/06
Photo-emissive cathodes
H01J40/06 (Photo-emissive cathodes) appears on 75 US grants and 68 published applications in this corpus.
Search patents in H01J- Granted patents
- 75
- Published applications
- 68
- Assignees
- 38
- Inventors
- 149
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 2 | 2 |
| 2005 | 0 | 2 |
| 2006 | 3 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 2 | 4 |
| 2010 | 1 | 5 |
| 2011 | 2 | 1 |
| 2012 | 2 | 1 |
| 2013 | 3 | 3 |
| 2014 | 8 | 1 |
| 2015 | 1 | 2 |
| 2016 | 3 | 3 |
| 2017 | 3 | 2 |
| 2018 | 2 | 6 |
| 2019 | 6 | 8 |
| 2020 | 12 | 6 |
| 2021 | 3 | 1 |
| 2022 | 0 | 3 |
| 2023 | 2 | 6 |
| 2024 | 5 | 4 |
| 2025 | 3 | 1 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Photoelectric conversion device and photoelectric conversion method11 Aug 2026US 12,706,288 B2Hamamatsu Photonics K.K.
- Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method26 May 2026US 12,640,354 B2Hamamatsu Photonics K.K.
- Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method3 Mar 2026US 12,567,553 B2Danmarks Tekniske Universitet
- And manufacturing methods of SWIR I2TUBE via heterogeneous wafer integration17 Jun 2025US 12,334,321 B1L3Harris Technologies, Inc.
- Photo-cathode for a vacuum system25 Mar 2025US 12,261,010 B2Hamamatsu Photonics K.K.
- Photoelectron source, multi-photoelectron source and multi-beam irradiation apparatus7 Aug 2025US 2025/0253141 A1NuFlare Technology, Inc.
- Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method31 Oct 2024US 2024/0363302 A1Danmarks Tekniske Universitet
- Field-emission photocathodes for high-power high-frequency electronics31 Oct 2024US 2024/0363320 A1
- Photoelectric conversion device and photoelectric conversion method24 Oct 2024US 2024/0355572 A1Danmarks Tekniske Universitet
- Photoelectric conversion device, electromagnetic wave detection device, photoelectric conversion method and electromagnetic wave detection method24 Oct 2024US 2024/0355601 A1Danmarks Tekniske Universitet
Most cited
By later US patents
- Method and apparatus for photoelectric generation of electricity38US 5,973,259 A1999
- Nano-patterned superconducting surface for high quantum efficiency cathode24US 9,589,757 B1Jefferson Science Associates, LLC · 2017
- Photomultiplier tube, image sensor, and an inspection system using a PMT or image sensor21US 9,478,402 B2KLA-Tencor Corporation · 2016
- Red sensitive photocathode having an aluminum oxide barrier layer10US 4,160,185 ARCA Corporation · 1979
- Bialkaline photocathode having increased spectral sensitivity and method of manufacturing same9US 4,419,603 AU. S. Philips Corporation · 1983