Patent US1235433A successfully refreshed from Google Patents.
Patent US3222557A successfully refreshed from Google Patents.
US3222557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube having a heat conducting mount
Assignee: Varian Medical Systems Inc
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Filing: 1961-10-03
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Granted: 1965-12-07
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Expires: 1981-10-03
Abstract
No abstract record available.
Inventors
- 👤 David D Meacham
- 👤 William D Smith
- 👤 Talcott Ruth Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:43
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/32; H01J19/36; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0027; Y; Y10; Y10S; Y10S165/00; Y10S165/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
AN ELECTRON TUBE HAVING A HERMETICALLY SEALED ENVELOPE AND CYLINDRICAL ELECTRODES WITHIN THE ENVELOPE, SAID ENVELOPE COMPRISING AN INVERTED CUP-SHAPED BERYLLIUML OXIDE MEMBER FORMING ONE END OF THE ENVELOPE, A DISKSHAPED BERYLLIUM OXIDE HEADER FORMING THE OTHER END OF THE ENVELOPE, TERMINAL PINS FOR SOME OF SAID ELECTRODES HERMETICALLY SEALED IN SAID HEADER, ONE OF SAID ELECTRODES BEING A GRID CONNECTED TO ONE OF SAID PINS INTERNALLY OF SAID ENVELOPE, SAID CUP-SHAPED MEMBER HAVING A FRUSTOCONICAL OUTSIDE WALL SURFACE WITH ITS LARGE DIAMETER END ADJACENT THE HEADRE END OF THE TUBE, SAID CUP-SHAPED MEMBER HAVING A CYLINDRICAL INSIDE WALL SURFACE, ONE OF SAID ELECTRODES BEING AN ELECTRON RECEIVING ELECTRODE FORMED BY AN ELECTRICALLY CONDUCTIVE LAYER ON SAID CYLINDRICAL INSIDE WALL SURFACE OF SAID CUP-SHAPED MEMBER, ANOTHER OF SAID ELECTRODES BEING A SECOND GRID, A METAL SUPPORT RING FOR SAID GRID, SAID SUPPORT RING HAVING AN ANNULAR U-SHAPED SECTION, THE BOTTOM OF SAID U-SHAPED BEING FLAT AND METALLICALLY BONDED TO THE FACE OF SAID HEADER, A METAL SEALING RING METALLICALLY BONDED TO THE RIM OF SAID CUP-SHAPED MEMBER AND HAVING AN OUTER FLANGE PORTION NESTED WITHIN THE OUTER LEG OF SAID U-SHAPED SECTION, AND A METALLIC BOND SEALING SAID FLANGE TO SAID OUTER LEG.
Claim 2
Dependent Claim
203 words
AN ELECTRON TUBE HAVING A HERMETICALLY SEALED ENVELOPE AND CYLINDRICAL ELECTRODES WITHIN THE ENVELOPE, SAID ENVELOPE COMPRISING AN INVERTED CUP-SHAPED BERYLLIUML OXIDE MEMBER FORMING ONE END OF THE ENVELOPE, A DISKSHAPED BERYLLIUM OXIDE HEADER FORMING THE OTHER END OF THE ENVELOPE, TERMINAL PINS FOR SOME OF SAID ELECTRODES HERMETICALLY SEALED IN SAID HEADER, ONE OF SAID ELECTRODES BEING A GRID CONNECTED TO ONE OF SAID PINS INTERNALLY OF SAID ENVELOPE, SAID CUP-SHAPED MEMBER HAVING A FRUSTOCONICAL OUTSIDE WALL SURFACE WITH ITS LARGE DIAMETER END ADJACENT THE HEADRE END OF THE TUBE, SAID CUP-SHAPED MEMBER HAVING A CYLINDRICAL INSIDE WALL SURFACE, ONE OF SAID ELECTRODES BEING AN ELECTRON RECEIVING ELECTRODE FORMED BY AN ELECTRICALLY CONDUCTIVE LAYER ON SAID CYLINDRICAL INSIDE WALL SURFACE OF SAID CUP-SHAPED MEMBER, ANOTHER OF SAID ELECTRODES BEING A SECOND GRID, A METAL SUPPORT RING FOR SAID GRID, SAID SUPPORT RING HAVING AN ANNULAR U-SHAPED SECTION, THE BOTTOM OF SAID U-SHAPED BEING FLAT AND METALLICALLY BONDED TO THE FACE OF SAID HEADER, A METAL SEALING RING METALLICALLY BONDED TO THE RIM OF SAID CUP-SHAPED MEMBER AND HAVING AN OUTER FLANGE PORTION NESTED WITHIN THE OUTER LEG OF SAID U-SHAPED SECTION, AND A METALLIC BOND SEALING SAID FLANGE TO SAID OUTER LEG.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |