US3225241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aperture fluorescent lamp
Assignee: GTE Sylvania Inc
•
Filing: 1962-05-02
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Granted: 1965-12-21
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Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Spencer Domina Eberle
- 👤 Jr Sandford Christopher Peek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:06
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/006; C03C17/007; C03C17/06; C03C17/10; H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/212; C03C2217/214; C03C2217/25; C03C2217/251; C03C2217/254; C03C2217/256; C03C2217/40; C03C2217/43; C03C2217/46; C03C2217/47; C03C2217/475; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/114
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A FLUORESCENT LAMP COMPRISING A SEALED ELONGATED TUBE, A COATING OF PHOSPHOR INSIDE SAID TUBE AND SUBTENDING THE MAJOR PORTION OF THE ANGLE AROUND THE AXIS OF SAID TUBE, A PORTION OF THE TUBE BEING FFREE FROM PHOSPHOR COATING AND SUBTENDING A MINOR PORTION OF SAID ANGLE, SAID PHOSPHOR COATING BEING THICK ENOUGH TO REFLECT BACK INTO THE TUBE SUBSTANTIALLY ALL LIGHT FALLING ON THE COATING.
Claim 2
Dependent Claim
66 words
A FLUORESCENT LAMP COMPRISING A SEALED ELONGATED TUBE, A COATING OF PHOSPHOR INSIDE SAID TUBE AND SUBTENDING THE MAJOR PORTION OF THE ANGLE AROUND THE AXIS OF SAID TUBE, A PORTION OF THE TUBE BEING FFREE FROM PHOSPHOR COATING AND SUBTENDING A MINOR PORTION OF SAID ANGLE, SAID PHOSPHOR COATING BEING THICK ENOUGH TO REFLECT BACK INTO THE TUBE SUBSTANTIALLY ALL LIGHT FALLING ON THE COATING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |