Patent US4605992A successfully refreshed from Google Patents.
US4605992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture insulation
Assignee: Individual
•
Filing: 1985-06-12
•
Granted: 1986-08-12
•
Expires: 2005-06-12
Abstract
Abstract The present invention is directed to a lighting fixture thermal insulating system which incorporates the spaceage technology of layered metallized polymer insulation. The present invention utilizes a structure and combination which yields an insulation system of superior performance while being cost competitive and because of reduced space requirement creates greater freedom of design in the manufacture of lighting fixtures. The laminations of metallized polymer and a spacer material may be located above or below the mounting pan or both. For reasons of economy, simple aluminum foil may be used to replace the metallized polymer with only slightly reduced performance.
Inventors
- 👤 Craig H. Cover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:28
CPC Classifications
F; F21; F21V; F21V25/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
49 words
In a lighting fixture having a mounting pan for ceiling or wall mounting, thermal insulation affixed to said mounting pan, and a lightbulb, the improvement comprising; a batt of thermal insulation containing two or more layers bonded together, each layer being two-ply and composed of metal foil and fiberglass.
Claim 2
Dependent Claim
49 words
In a lighting fixture having a mounting pan for ceiling or wall mounting, thermal insulation affixed to said mounting pan, and a lightbulb, the improvement comprising; a batt of thermal insulation containing two or more layers bonded together, each layer being two-ply and composed of metal foil and fiberglass.
Claim 3
Dependent Claim
16 words
The lighting fixture described in claim 1 wherein four or more of said layers are present.
Claim 4
Dependent Claim
14 words
The lighting fixture described in claim 2 wherein said metal foil is aluminum foil.
Claim 5
Dependent Claim
19 words
The lighting fixture described in claim 3 wherein said aluminum foil is bonded to said fiberglass with an adhesive.
Claim 6
Dependent Claim
31 words
The lighting fixture of claim 4 wherein said layers of insulation are located only between the face of the mounting pan and the ceiling or wall on which it is mounted.
Claim 7
Dependent Claim
21 words
The lighting fixture of claim 4 wherein said layers and insulation are located only between the mounting pan and the lightbulb.
Claim 8
Dependent Claim
20 words
The lighting fixture of claim 4 wherein said layers of insulation are located on both sides of said mounting pan.
Claim 9
Dependent Claim
14 words
The lighting figure of claim 2 wherein each layer is less than 1/2-inch thick.
References Cited (Backward Citations)
US4104713A
Cited
US4234916A
Cited
US4356540A
Cited
US4302798A
Cited
US4507719A
Cited
US4514792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |