Patent US3409792A successfully refreshed from Google Patents.
US3409792A
Expired / Lapsed
US
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Fluorescent panel lamps with white emitting phosphor coated on envelope backplate and red emitting phosphor coated on envelope faceplate
Assignee: General Electric Co
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Filing: 1965-11-15
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Granted: 1968-11-05
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Expires: 1985-11-15
Abstract
No abstract record available.
Inventors
- 👤 William C Martyny
- 👤 Percy J Underwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:08
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/72; C09K11/73; C09K11/02; C09K11/025; C09K11/71; H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/305; H01J61/307
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2135732A
Cited
US2346522A
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US2445692A
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US3115309A
Cited
US3247415A
Cited
US3287586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |