US2419902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent electric discharge lamp
Assignee: GTE Sylvania Inc
•
Filing: 1944-03-10
•
Granted: 1947-04-29
•
Expires: 1964-03-10
Abstract
No abstract record available.
Inventors
- 👤 Eric L Mager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:00
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J61/12; H01J61/18; H01J61/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2353660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |