US2863078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode heat exchanger for electron discharge tubes
Assignee: Unisys Corp
•
Filing: 1955-07-07
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Granted: 1958-12-02
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Expires: 1975-07-07
Abstract
No abstract record available.
Inventors
- 👤 Prado John R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:16
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/027; H01J23/033; H01J19/00; H01J19/28; H01J19/32; H01J19/36; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1991065A
Cited
US1978424A
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US2098380A
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US2241974A
Cited
US2440245A
Cited
US2513828A
Cited
GB698214A
Cited
GB706209A
Cited
US2619611A
Cited
US2693347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |