US2688707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube structure
Assignee: Varian Medical Systems Inc
•
Filing: 1948-02-28
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Granted: 1954-09-07
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Expires: 1968-02-28
Abstract
No abstract record available.
Inventors
- 👤 William W Eitel
- 👤 Jack A Mccullough
- 👤 Harold E Sorg
- 👤 Clayton E Murdock
- 👤 Paul D Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:03
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/32; H01J19/34; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1713356A
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US2069407A
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US2398609A
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US2431337A
Cited
US2414137A
Cited
US2392397A
Cited
US2455851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |