US2977494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube and socket therefor
Assignee: Varian Medical Systems Inc
•
Filing: 1957-06-17
•
Granted: 1961-03-28
•
Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Johnstone
- 👤 Murray H Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:41
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1578707A
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US1721971A
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US1727826A
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US2022964A
Cited
US2477940A
Cited
US2644907A
Cited
US2701869A
Cited
US2808528A
Cited
US2814750A
Cited
US2859372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |