H01J 35/20
Selection of substances for gas fillings
Official title: Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
H01J35/20 (Selection of substances for gas fillings) appears on 50 US grants and 54 published applications in this corpus.
Search patents in H01J- Granted patents
- 50
- Published applications
- 54
- Assignees
- 41
- Inventors
- 132
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 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 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 3 |
| 2012 | 2 | 4 |
| 2013 | 4 | 1 |
| 2014 | 1 | 5 |
| 2015 | 3 | 2 |
| 2016 | 1 | 3 |
| 2017 | 3 | 6 |
| 2018 | 5 | 2 |
| 2019 | 2 | 3 |
| 2020 | 4 | 3 |
| 2021 | 4 | 1 |
| 2022 | 0 | 3 |
| 2023 | 4 | 2 |
| 2024 | 0 | 3 |
| 2025 | 1 | 3 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Modular getters and getters with different materials in vacuum enclosures31 Mar 2026US 12,592,354 B2Varex Imaging Corporation
- X-ray tube and associated manufacturing process13 Jan 2026US 12,525,419 B2Comet Holding AG
- Open microfocus x-ray source and control method thereof11 Feb 2025US 12,224,151 B2Wuxi Unicomp Technology Co., Ltd.
- Rotary-transmission-target microfocus X-ray source and ray generation method14 Nov 2023US 11,817,287 B1Beijing Institute of Technology
- Method for reducing the diameter of a x-ray tube through recessing of the vacuum port5 Sep 2023US 11,749,490 B2Visuray Intech Ltd (BVI)
- Vacuum enclosures and x-ray sources including vacuum enclosures with multiple sealable openings24 Sep 2026US 2026/0290738 A1Varex Imaging Corporation
- Multi-point gas-discharge x-ray tube for stationary computed tomography systems24 Sep 2026US 2026/0290740 A1Creighton Scientific, Inc.
- X-ray tubes19 Feb 2026US 2026/0051452 A1
- Field emission x-ray source and systems with distributed gettering25 Dec 2025US 2025/0391626 A1Varex Imaging Corporation
- Anode rotation sensing in x-ray tubes4 Dec 2025US 2025/0372336 A1Varex Imaging Corporation
Most cited
By later US patents
- Cathode structure with getter material and diamond film, and methods of manufacture thereof16US 6,465,954 B2Medtronic AVE, Inc. · 2002
- X-ray tube having a getter shield and method14US 5,509,045 APicker International, Inc. · 1996
- X-ray tube metal frame gettering device8US 6,570,959 B1Koninklijke Philips Electronics N. V. · 2003
- X-ray source and X-ray photographing apparatus including the source8US 8,472,586 B2Canon Kabushiki Kaisha · 2013
- Field emitter X-ray source and system and method thereof7US 7,123,689 B1General Electric Company · 2006