Patent US2644113A successfully refreshed from Google Patents.
US2644113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminous body
Assignee: Individual
•
Filing: 1950-05-22
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Granted: 1953-06-30
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Expires: 1970-05-22
Abstract
No abstract record available.
Inventors
- 👤 Walter V Etzkorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:38
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; F; F21; F21S; F21S4/00; F21S4/20; F21V; F21V9/00; F21V9/30; F21V9/32; G; G09; G09F; G09F13/00; G09F13/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1550197A
Cited
US1839479A
Cited
US2064354A
Cited
US2117544A
Cited
US2216220A
Cited
US2525624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |