US3287597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum tube with structurally integrated by-pass capacitor
Assignee: Varian Medical Systems Inc
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Filing: 1962-12-24
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Granted: 1966-11-22
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Expires: 1982-12-24
Abstract
No abstract record available.
Inventors
- 👤 William D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:41
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/40; H01J19/32; H01J19/34; H01J19/42; H01J19/78; H01J21/00; H01J21/02; H01J21/06; H01J21/065; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
AN ELECTRON TUBE COMPRISING CYLINDRICAL ELECTRODES INCLUDING A CATHODE, A CONTROL GRID, A SCREEN GRID AND AN ANODE, TERMINALS FOR SAID TUBE COMPRISING A METAL RING PROJECTING OUTSIDE SAID TUBE AND CONNECTED INTERNALLY TO SAID CATHODE, A COMPLETELY METAL RING STRUCTURE PROJECTING OUTSIDE SAID TUBE AND CONNECTED INTERNALLY TO SAID SCREEN GRID, A THIN CERAMIC RING-SHAPED WAFER SANDWICHED BETWEEN SAID RING AND RING STRUCTURE IN ABUTING RELATIONSHIP AND FORMING THEREWITH A BY-PASS CAPACITOR, THE EXTERNAL DIAMETER OF EACH OF SAID RING AND RING STRUCTURE BEING AT LEAST AS GREATER AS THAT OF SAID WAFER, AND THE MINIMUM AIR GAP BETWEEN SAID RING AND RING STRUCTURE BEING GREATER THAN THE THICKNESS OF SAID WAFER.
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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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |