US2780561A
Expired / Lapsed
US
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Method of making metalized ceramic structures for vacuum tube envelopes
Assignee: Varian Medical Systems Inc
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Filing: 1953-09-14
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Granted: 1957-02-05
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Expires: 1973-09-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Louis H La Forge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:08
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B37/00; C04B37/003; C04B37/006; C04B37/02; C04B37/023; C04B37/026; C04B41/45; C04B41/50; C04B41/51; C04B41/5133; C04B41/5138; C04B41/52; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C04B41/89; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/124; C04B2237/125; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/407; C04B2237/50; C04B2237/72; C04B2237/82
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
THE METHOD OF METALIZING A CERAMIC BODY, WHICH COMPRISES COATING THE CERAMIC WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF METAL MOLYBDATES AND METAL TUNGSTATES, FLIRING THE COATED CERAMIC IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE OF 1125*C. TO 1040*C. FOR 2 TO 20 MINUTES TO FORM ON THE CERAMIC AND BY UNION THEREWITH A GLASSY SURFACE, AND THEN FIRING IT IN A REDUCING ATMOSPHERE AT A TEMPERATURE OF 1300*C. TO 1225*C. FOR 20 TO 45 MINUTES TO PROVIDE AN OUTER SURFACE OF METAL INTEGRALLY UNITED WITH AND OVERLYING SAID GLASSY SURFACE.
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |