Patent US2539096A successfully refreshed from Google Patents.
US2539096A
Expired / Lapsed
US
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Electron tube and grid for the same
Assignee: Varian Medical Systems Inc
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Filing: 1949-09-19
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Granted: 1951-01-23
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Expires: 1969-09-19
Abstract
No abstract record available.
Inventors
- 👤 Harold D Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:08
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/30; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; H01J2893/002; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12861; Y10T428/12875
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
23 words
A GRID WIRE FOR AN ELECTRON TUBE COMPRISING A CORE OF MOLYBDENUM, AN INTERMEDIATE LAYER OF GOLD AND A SURFACE LAYER OF RUTHENIUM.
References Cited (Backward Citations)
GB356436A
Cited
US2486436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |