Patent US3308323A successfully refreshed from Google Patents.
US3308323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inclined-field high-voltage vacuum tubes
Assignee: High Voltage Engineering Corp
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Filing: 1961-05-25
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Granted: 1967-03-07
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Expires: 1981-05-25
Abstract
No abstract record available.
Inventors
- 👤 Graaff Robert J Van De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:59
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
AN ELONGATED HIGH-VOLTAGE VACUUM TUBE HAVING A LONGITUDINAL PASSAGEWAY THERETHROUGH AND COMPRISING A MULTIPLICITY OF ALTERNATING INSULATING RINGS AND ELECTRODE DISKS HAVING APERTURES SO AS TO DEFINE SAID PASSAGEWAY EACH OF SAID ELECTRODE DISKS BEING BOUNDED BY FLAT CONDUCTING MATERIAL AND HAVING LATERAL SURFACES WHICH ARE GENERALLY INCLINED WITH RESPECT TO A PLANE PERPENDICULAR TO SAID PASSAGEWAY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |