US3227905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube comprising beryllium oxide ceramic
Assignee: Varian Medical Systems Inc
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Filing: 1961-10-02
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Granted: 1966-01-04
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Expires: 1981-10-02
Abstract
No abstract record available.
Inventors
- 👤 Talcott Ruth Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:01
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J2893/00; H01J2893/0001; H01J2893/0002
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
AN ELECTRON TUBE COMPRISING A HERMETICALLY SEALED ENVELOPE AND ELECTRODES WITHIN THE ENVELOPE, SAID ENVELOPE COMPRISING A BERYLLIUM OXIDE WALL SECTION, ONE OF SAID ELECTRODES BEING AN ELECTRON RECEIVING ELECTRODE, THE INSIDE WALL SURFACE OF SAID BERYLLIUM OXIDE SECTION HAVING A METALLIC COATING FORMING SAID ONE ELECTRODE, SAID BERYLLIUM OXIDE SECTION BEING MATALIZED ON ITS OUTSIDE SURFACE, A BERYLLIUM OXIDE COOLER HAVING A METALIZED SURFACE, AND A BRAZE JOINT CONNECTING SAID METALIZED SURFACE OF THE COOLER TO SAID METALIZED OUTSIDE SURFACE OF THE BERYLIUM OXIDE WALL SECTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |