US2798577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalized ceramic structure for vacuum tube envelopes and method of making the same
Assignee: Varian Medical Systems Inc
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Filing: 1952-08-01
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Granted: 1957-07-09
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Expires: 1972-08-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Louis H La Forge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:31
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/636; C04B35/6365; C04B37/003; C04B37/006; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/09; C04B2237/12; C04B2237/122; C04B2237/123; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/50; C04B2237/72; C04B2237/82; Y; Y10; Y10S; Y10S205/00; Y10S205/917; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/1209; Y10T428/12493; Y10T428/12535; Y10T428/12597; Y10T428/12604; Y10T428/12611; Y10T428/12618
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A SEAL STRUCTURE FOR A VACUUMM TUBE ENVELOPE COMPRISING A CERAMIC SECTION AND ANOTHER SECTION HAVE OPPOSED SURFACES ALONG THE SEALING JOINT, A GLASSY TRANSITION LAYER AT THE SURFACE OF THE CERAMIC SECTION COMPRISING A METAL OXIDE SELCTED FROM THE GROUP CONSISTING OF MANGANESE, COBALT, AND IRON OXIDES, AND MIXTURES THEREOF, A METALIZING LAYER COMPRISING A MIXTURE OF MOLYBDENUM AND MANGANESE SINTERED TO THT FLASSY LAYER, AND A BRAZING METAL UNITING THE MELTING LAYER TO SAID OTHER ENVELOPE SECTION.
Claim 2
Dependent Claim
79 words
A SEAL STRUCTURE FOR A VACUUMM TUBE ENVELOPE COMPRISING A CERAMIC SECTION AND ANOTHER SECTION HAVE OPPOSED SURFACES ALONG THE SEALING JOINT, A GLASSY TRANSITION LAYER AT THE SURFACE OF THE CERAMIC SECTION COMPRISING A METAL OXIDE SELCTED FROM THE GROUP CONSISTING OF MANGANESE, COBALT, AND IRON OXIDES, AND MIXTURES THEREOF, A METALIZING LAYER COMPRISING A MIXTURE OF MOLYBDENUM AND MANGANESE SINTERED TO THT FLASSY LAYER, AND A BRAZING METAL UNITING THE MELTING LAYER TO SAID OTHER ENVELOPE SECTION.
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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) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |