Patent US2996401A successfully refreshed from Google Patents.
US2996401A
Expired / Lapsed
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Method of making ceramic structures for electron tubes
Assignee: Varian Medical Systems Inc
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Filing: 1955-09-30
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Granted: 1961-08-15
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Expires: 1975-09-30
Abstract
No abstract record available.
Inventors
- 👤 James R Welch
- 👤 Paul D Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:28
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/636; C04B35/6365; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B41/45; C04B41/50; C04B41/51; C04B41/5138; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/064; C04B2237/068; C04B2237/12; C04B2237/122; C04B2237/123; C04B2237/124; C04B2237/126; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/50; C04B2237/59; C04B2237/592; C04B2237/72; C04B2237/82; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
THE METHOD OF METALIZING A CERAMIC BODY FOR AN ELECTRON TUBE TO PROVIDE A SURFACE SUITABLE FOR BONDING TO A METAL OR METALIZED BODY TO FORM BETWEEN THE TWO BODIES A VACUUM TIGHT JOINT OF HIGH MECHANICAL STRENGTH, WHICH COMPRISES COATING THE CERAMIC WITH A MIXTURE OF METAL POWDERS INCLUDING TITANIUM, MANGANESE AND A MAJOR PROPORTION BY WEIGHT OF METAL IN THE GROUP CONSISTING OF MOLYBDENUM AND TUNGSTEN, AND THEN FIRING THE COATED CERAMIC IN A REDUCING ATMOSPHERE AT A TEMPERATURE AT LEAST AS HIGH AS THE SINTERING TEMPERATURE OF THE MIXTURE, SAID TITANIUM COMPRISING BETWEEN 1% AND 25% BY WEIGHT OF SAID MIXTURE OF METAL POWDERS AND SAID MANGANESE COMPRISING BETWEEN 40% AND 10% BY WEIGHT OF SAID MIXTURE OF METAL POWDERS.
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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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |