Patent US2618760A successfully refreshed from Google Patents.
US2618760A
Expired / Lapsed
US
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Glow tube anode construction
Assignee: Northrop Grumman Corp
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Filing: 1950-11-06
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Granted: 1952-11-18
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Expires: 1970-11-06
Abstract
No abstract record available.
Inventors
- 👤 Robert D Hancock
- 👤 Charles R Williams
- 👤 Glenn E Hagen
- 👤 Chris S Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:00
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)
US2142106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |