US3188461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural walled fixtures
Assignee: Individual
•
Filing: 1963-03-12
•
Granted: 1965-06-08
•
Expires: 1983-03-12
Abstract
No abstract record available.
Inventors
- 👤 Willis L Lipscomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:07
CPC Classifications
F; F21; F21V; F21V3/00; F21V3/02; F21V29/00; F21V29/15; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A LIGHTING FIXTURE COMPRISING: AN ELONGATED LIGHT DIFFUSER HAVING INNER AND OUTER TRANSLUCENT WALLS, PORTIONS OF SAID WALLS BEING OF DOUBLE WALL FORM AND DEFINING AN AIR SEALED SPACE THEREIN, CONTIGUOUS EDGES OF SAID WALLS SEALED TOGETHER AND TURNED BACK UPON THEMSELVES TO DEFINE LONGITUDINALLY EXTENDING, INWARDLY RETURNED EDGE PORTIONS; MEANS SUPPORTING SAID LIGHT DIFFUSER AND ENGAGING SAID RETURNED EDGE PORTIONS; AND LIGHT REFLECTIVE MATERIAL ON A PORTION OF THE RADIALLY OUTWARD SURFACE OF SAID INNER WALL.
Claim 2
Dependent Claim
77 words
A LIGHTING FIXTURE COMPRISING: AN ELONGATED LIGHT DIFFUSER HAVING INNER AND OUTER TRANSLUCENT WALLS, PORTIONS OF SAID WALLS BEING OF DOUBLE WALL FORM AND DEFINING AN AIR SEALED SPACE THEREIN, CONTIGUOUS EDGES OF SAID WALLS SEALED TOGETHER AND TURNED BACK UPON THEMSELVES TO DEFINE LONGITUDINALLY EXTENDING, INWARDLY RETURNED EDGE PORTIONS; MEANS SUPPORTING SAID LIGHT DIFFUSER AND ENGAGING SAID RETURNED EDGE PORTIONS; AND LIGHT REFLECTIVE MATERIAL ON A PORTION OF THE RADIALLY OUTWARD SURFACE OF SAID INNER WALL.
References Cited (Backward Citations)
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Cited
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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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |