Patent US2517334A successfully refreshed from Google Patents.
US2517334A
Expired / Lapsed
US
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Electron tube having annular envelope
Assignee: Varian Medical Systems Inc
•
Filing: 1947-12-26
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Granted: 1950-08-01
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Expires: 1967-12-26
Abstract
No abstract record available.
Inventors
- 👤 Clayton E Murdock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:14
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J2893/00; H01J2893/0001; H01J2893/0002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1196474A
Cited
US2121600A
Cited
US2216170A
Cited
US2407274A
Cited
US2436649A
Cited
US2455846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-31 | 1954-01-30 | 1954-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-31 | 1958-01-30 | 1958-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-31 | 1962-01-30 | 1962-08-01 | $7700.00 | Window Closed / Lapsed |