US3384400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-tight connection between a ceramic tube and a disk-shaped metal part of an electrical discharge vessel
Assignee: Siemens AG
•
Filing: 1966-03-23
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Granted: 1968-05-21
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Expires: 1986-03-23
Abstract
No abstract record available.
Inventors
- 👤 Sandhagen Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:32
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/26; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/123; C04B2237/124; C04B2237/30; C04B2237/40; C04B2237/405; C04B2237/407; C04B2237/50; C04B2237/62; C04B2237/64; C04B2237/76; C04B2237/765; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0041; Y; Y10; Y10T; Y10T403/00; Y10T403/21; Y10T403/217
Claims Analysis
Total Claims: 0
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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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |