US3376461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic cathodes and high frequency electron discharge devices
Assignee: Varian Medical Systems Inc
•
Filing: 1964-12-28
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Granted: 1968-04-02
•
Expires: 1984-12-28
Abstract
No abstract record available.
Inventors
- 👤 Millward Samuel James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:09
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/14; H01J1/28; H01J23/00; H01J23/02; H01J23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2103033A
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US2472189A
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GB761684A
Cited
US2874077A
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US2959704A
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US3155864A
Cited
US3154711A
Cited
US3267308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |