Patent US3115309A successfully refreshed from Google Patents.
US3115309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aperture fluorescent lamp
Assignee: GTE Sylvania Inc
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Filing: 1959-07-09
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Granted: 1963-12-24
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Expires: 1979-07-09
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 19:39
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35; F; F21; F21S; F21S41/00; F21S41/10; F21S41/14; F21S41/17; F21S41/173; F21V; F21V7/00; F21V7/005; F21V7/04; F21V7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A LIGHTING UNIT COMPRISING A PARABOLIC REFLECTOR, A TUBULAR FLUORESCENT LAMP HAVING A PHOSPHOR COATING WITH A LONGITUDINAL APERTURE THEREIN, ONE EDGE OF SAID APERTURE BEING PLACED AT THE FOCUS OF SAID PARABOLIC REFLECTOR, THE LAMP BEING TANGENT TO THE AXIS OF THE PARABOLA AT SAID FOCUS, THE OTHER EDGE OF SAID APERTURE BEING PLACED OFF THE AXIS OF, AND NEARER TO, THE APEX OF SAID PARABOLA.
Claim 2
Dependent Claim
67 words
A LIGHTING UNIT COMPRISING A PARABOLIC REFLECTOR, A TUBULAR FLUORESCENT LAMP HAVING A PHOSPHOR COATING WITH A LONGITUDINAL APERTURE THEREIN, ONE EDGE OF SAID APERTURE BEING PLACED AT THE FOCUS OF SAID PARABOLIC REFLECTOR, THE LAMP BEING TANGENT TO THE AXIS OF THE PARABOLA AT SAID FOCUS, THE OTHER EDGE OF SAID APERTURE BEING PLACED OFF THE AXIS OF, AND NEARER TO, THE APEX OF SAID PARABOLA.
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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) | 1966-12-23 | 1967-06-24 | 1967-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-23 | 1971-06-24 | 1971-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-23 | 1975-06-24 | 1975-12-24 | $7700.00 | Window Closed / Lapsed |