US3394451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-to-ceramic seal for high voltage electron tubes and methods of fabrication
Assignee: Varian Medical Systems Inc
•
Filing: 1965-07-28
•
Granted: 1968-07-30
•
Expires: 1985-07-28
Abstract
No abstract record available.
Inventors
- 👤 William R Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:30
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/123; C04B2237/124; C04B2237/30; C04B2237/32; C04B2237/40; C04B2237/50; C04B2237/72; C04B2237/76; C04B2237/765; C04B2237/80; C04B2237/82; C04B2237/88
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2503418A
Cited
US2666008A
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US2647218A
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US2642517A
Cited
US2798577A
Cited
US2932884A
Cited
US2996401A
Cited
US3284878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |