Patent US3358138A successfully refreshed from Google Patents.
US3358138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lay-in closure for lighting fixture
Assignee: Emerson Electric Co
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Filing: 1965-12-13
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Granted: 1967-12-12
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Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 Walter J Trantina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:43
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/02; F21V; F21V17/00; F21V17/10; F21V17/102; F21V17/107; F21V3/00; F21V3/04; F21V3/049; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
218 words
IN A LIGHTING FIXTURE WITH A LAY-IN TYPE CLOSURE HAVING A FIXED FRAME WITH SIDE WALLS HAVING PARALLEL SIDE FLANGES AND END WALLS HAVING PARALLEL END FLANGES PERPENCIRCULAR TO SAID SIDE FLANGES, A DIFFUSER HAVING SIDES AND ENDS, SAID DIFFUSER BEING A WIDTH TO OVERLIE AND REST UPON SAID SIDE FLANGES AND A LENGTH TO END SHORT OF SAID END FLANGES WHEN IN ITS LIGHT-DIFFUSING CONDITION, SAID DIFFUSER HAVING A HINGE LUG PROJECTING FROM EACH END OVER THE SAID END FLANGES, SAID HINGE LUGS BEING SPACED FROM BUT NEAR ONE SIDE OF SAID DIFFUSER, AND A LAMP HOUSING ABOVE SAID FLANGES AND DIFFUSER, THE IMPROVEMENT COMPRISING A TAB MEMBER PROJECTING INBOARDLY FROM EACH OF SAID END WALL ABOVE THE END WALL FLANGE AND SPACED FROM SAID SIDE WALL A DISTANCE GREATER THAN THE DISTANCE OF THE HINGE LUGS FROM THE SIDE OF THE DIFFUSER NEAREST THEM, AND A HOUSING WALL OVERHANGING THE END FLANGE ADJACENT THE SAID TAB AND SPACED FROM THE TOP OF SAID TAB AT A POINT BETWEEN THE TAB AND THE SIDE WALL CLOSER TO SAID TAB THAN THE HEIGHT OF THE ADJACENT SIDE OF THE DIFFUSER A DISTANCE GREATER THAN THE EFFECTIVE THICKNESS OF THE HINGE LUG BUT LESS THAN THE DISTANCE OF THE HINGE LUG FROM THE SIDE OF THE DIFFUSER NEAREST IT.
Claim 2
Dependent Claim
218 words
IN A LIGHTING FIXTURE WITH A LAY-IN TYPE CLOSURE HAVING A FIXED FRAME WITH SIDE WALLS HAVING PARALLEL SIDE FLANGES AND END WALLS HAVING PARALLEL END FLANGES PERPENCIRCULAR TO SAID SIDE FLANGES, A DIFFUSER HAVING SIDES AND ENDS, SAID DIFFUSER BEING A WIDTH TO OVERLIE AND REST UPON SAID SIDE FLANGES AND A LENGTH TO END SHORT OF SAID END FLANGES WHEN IN ITS LIGHT-DIFFUSING CONDITION, SAID DIFFUSER HAVING A HINGE LUG PROJECTING FROM EACH END OVER THE SAID END FLANGES, SAID HINGE LUGS BEING SPACED FROM BUT NEAR ONE SIDE OF SAID DIFFUSER, AND A LAMP HOUSING ABOVE SAID FLANGES AND DIFFUSER, THE IMPROVEMENT COMPRISING A TAB MEMBER PROJECTING INBOARDLY FROM EACH OF SAID END WALL ABOVE THE END WALL FLANGE AND SPACED FROM SAID SIDE WALL A DISTANCE GREATER THAN THE DISTANCE OF THE HINGE LUGS FROM THE SIDE OF THE DIFFUSER NEAREST THEM, AND A HOUSING WALL OVERHANGING THE END FLANGE ADJACENT THE SAID TAB AND SPACED FROM THE TOP OF SAID TAB AT A POINT BETWEEN THE TAB AND THE SIDE WALL CLOSER TO SAID TAB THAN THE HEIGHT OF THE ADJACENT SIDE OF THE DIFFUSER A DISTANCE GREATER THAN THE EFFECTIVE THICKNESS OF THE HINGE LUG BUT LESS THAN THE DISTANCE OF THE HINGE LUG FROM THE SIDE OF THE DIFFUSER NEAREST IT.
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |