Patent US2728004A successfully refreshed from Google Patents.
US2728004A
Expired / Lapsed
US
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Glow tube
Assignee: Victoreen Instrument Co
•
Filing: 1948-11-16
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Granted: 1955-12-20
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Expires: 1968-11-16
Abstract
No abstract record available.
Inventors
- 👤 John A Victoreen
- 👤 James H Eddleston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:19
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/30; H01J9/00; H01J9/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1658568A
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US1531301A
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US1762712A
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US1871344A
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US2054048A
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US2071748A
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US2078776A
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US2174382A
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US2172205A
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US2276639A
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US2326631A
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US2495274A
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US2479882A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |