US3293476A
Expired / Lapsed
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Electrode assembly for an electron discharge device made from a material having a low carbon content
Assignee: Varian Medical Systems Inc
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Filing: 1963-01-04
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Granted: 1966-12-20
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Expires: 1983-01-04
Abstract
No abstract record available.
Inventors
- 👤 Feinleib Morris
- 👤 Robert L Lum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:12
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
AN ELECTRON DISCHARGE DEVICE COMPRISING AN ENVELOPE, ELECTRODE ELEMENTS IN SAID ENVELOPE, SUPPORTING MEANS IN SAID ENVELOPE FOR SAID ELECTRODES, SAID ELECTRODE ELEMENTS INCLUDING A CATHODE, SAID CATHODE AND A PREPONDERANCE OF THE PARTS OF SAID ELECTRON DISCHARGE DEVICE WHICH OPERATE IN THE RANGE OF THE CATHODE OPERATING TEMPERATURE AND ABOVE MADE OF MATERIAL HAVING A CARBON CONTENT NOT EXCEEDING 100 PARTS PER MILLION.
Claim 2
Dependent Claim
64 words
AN ELECTRON DISCHARGE DEVICE COMPRISING AN ENVELOPE, ELECTRODE ELEMENTS IN SAID ENVELOPE, SUPPORTING MEANS IN SAID ENVELOPE FOR SAID ELECTRODES, SAID ELECTRODE ELEMENTS INCLUDING A CATHODE, SAID CATHODE AND A PREPONDERANCE OF THE PARTS OF SAID ELECTRON DISCHARGE DEVICE WHICH OPERATE IN THE RANGE OF THE CATHODE OPERATING TEMPERATURE AND ABOVE MADE OF MATERIAL HAVING A CARBON CONTENT NOT EXCEEDING 100 PARTS PER MILLION.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |