US2891184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glow tube cathode
Assignee: Unisys Corp
•
Filing: 1956-01-31
•
Granted: 1959-06-16
•
Expires: 1976-01-31
Abstract
No abstract record available.
Inventors
- 👤 Theodore A Haddad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:28
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J2893/00; H01J2893/0069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733501A
Cited
US1852020A
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US1965586A
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US2433821A
Cited
US2520171A
Cited
US2667596A
Cited
US2795032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |