H01J 29/38
Not using charge storage
Official title: not using charge storage, e.g. photo-emissive screen, extended cathode {(electrodes using photo-emission in general H01J1/34)}
H01J29/38 (Not using charge storage) appears on 123 US grants and 14 published applications in this corpus.
Search patents in H01J- Granted patents
- 123
- Published applications
- 14
- Assignees
- 45
- Inventors
- 163
- Latest grant
- 20 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 7 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 9 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 8 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 2 |
| 2019 | 1 | 1 |
| 2020 | 2 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Lattice matched photocathodes for extended wavelengths20 May 2025US 12,308,198 B2L3Harris Technologies, Inc.
- Electron tube3 Oct 2023US 11,776,798 B2Hamamatsu Photonics K.K.
- Photocathode including silicon substrate with boron layer3 Aug 2021US 11,081,310 B2KLA-Tencor Corporation
- Biology-based enhanced vision using light amplification and adaptable to thin films15 Sep 2020US 10,775,301 B2Arizona Board of Regents of behalf of Arizona State University
- Photoelectric surface, photoelectric conversion tube, image intensifier, and photomultiplier tube11 Feb 2020US 10,559,445 B2Hamamatsu Photonics K.K.
- Design of lattice matched photocathodes for extended wavelengths31 Jul 2025US 2025/0246392 A1L3Harris Technologies, Inc.
- Design of lattice matched photocathodes for extended wavelengths23 May 2024US 2024/0170247 A1L3Harris Technologies, Inc.
- Electron tube29 Dec 2022US 2022/0415638 A1Hamamatsu Photonics K.K.
- Photocathode including silicon substrate with boron layer28 Feb 2019US 2019/0066962 A1KLA-Tencor Corporation
- Biology-based enhanced vision using light amplification and adaptable to thin films5 Apr 2018US 2018/0095029 A1Arizona Board of Regents of behalf of Arizona State University
Most cited
By later US patents
- Photoluminescent objects207US 9,057,021 B2Performance Indicator, LLC · 2015
- Low intensity X-ray and gamma-ray imaging device46US 4,142,101 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1979
- Epitaxial indium-gallium-arsenide phosphide layer on lattice-matched indium-phosphide substrate and devices45US 3,982,261 AVarian Associates, Inc. · 1976
- Photocathodes38US 4,099,198 AEnglish Electric Valve Company Limited · 1978
- Process of making structured x-ray phosphor screen32US 4,069,355 AGeneral Electric Company · 1978