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Patent US3712981A successfully refreshed from Google Patents.
US3712981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture for u-bent fluorescent lamps
Assignee: Westinghouse Electric Corp
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Filing: 1969-11-28
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Granted: 1973-01-23
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Expires: 1989-11-28
Abstract
Abstract A LIGHTING FIXTURE FOR USE WITH FLUORESCENT U-BENT LAMPS IN WHICH THE LAMP HOLDER OR ELECTRICAL SOCKER IS MOUNTED AT AN ANGLE WITH RESPECT TO A VERTICAL PLANE THROUGH THE LIGHTING FIXTURE IN ORDER THAT THE U-BENT LAMPS ARE MOUNTED AT ANGLE WITH RESPECT TO THE FIXTURE TO THEREBY PLACE THE HIGHER LIGHT OUTPUT, U-BENT END OF THE LAMP A GREATER DISTANCE FROM THE REFRACTOR THAN THE OPEN OR MOUNTING PIN END OF THE LAMP.
Inventors
- 👤 W Eargle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:29
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/04; F21S8/02; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |