Patent US4452848A successfully refreshed from Google Patents.
US4452848A
Expired / Lapsed
US
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Composite roof membrane
Assignee: LANG FREDERIC A 421 CANTERBURY LANE GULF BREEZE FL 32561
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Filing: 1983-08-29
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Granted: 1984-06-05
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Expires: 2003-08-29
Abstract
Abstract A composite roof membrane for use in air supported and/or tensioned roof structures comprises an interior vapor barrier formed of a scrim reinforced thin film material, an intermediate layer of translucent flexible insulation, and an outer layer of liquid impervious but vapor porous fabric.
Inventors
- 👤 David H. Geiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:57
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B27/30; B32B27/304; B32B27/32; B32B27/322; B32B5/00; B32B5/02; B32B5/024; B32B5/22; B32B5/24; B32B5/26; E; E04; E04B; E04B7/00; E04B7/14; E04D; E04D12/00; E04D12/002; E04D5/00; E04D5/10; B32B2255/00; B32B2255/02; B32B2255/26; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/726; B32B2307/7265; B32B2419/00; B32B2419/06; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/159
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
44 words
A composite roof membrane for use in air supported and tensioned roof structures comprising an interior vapor barrier formed of a scrim reinforced thin film material, an intermediate layer of translucent flexible insulation and an outer layer of liquid impervious but vapor porous fabric.
Claim 2
Dependent Claim
44 words
A composite roof membrane for use in air supported and tensioned roof structures comprising an interior vapor barrier formed of a scrim reinforced thin film material, an intermediate layer of translucent flexible insulation and an outer layer of liquid impervious but vapor porous fabric.
Claim 3
Dependent Claim
23 words
A composite roof membrane as defined in claim 1 wherein the film of said interior vapor barrier is formed of a Tedlar film.
Claim 4
Dependent Claim
21 words
A composite roof membrane as defined in claim 1 wherein the film of said interior vapor barrier is formed of Teflon.
Claim 5
Dependent Claim
21 words
A composite roof membrane as defined in claim 3 wherein the scrim reinforcing for the Tedlar film is formed of polyester.
Claim 6
Dependent Claim
19 words
A composite roof membrane as defined in claim 4 wherein said Tedlar film is less than 1 mil. thick.
Claim 7
Dependent Claim
16 words
A composite roof membrane as defined in claim 1 wherein said insulation is formed of fiberglass.
Claim 8
Dependent Claim
28 words
A composite roof membrane as defined in claim 6 wherein said fiberglass insulation comprises at least one layer four inches thick and having an R value of 3.5.
Claim 9
Dependent Claim
19 words
A composite roof membrane as defined in claim 1 wherein said outer fabric layer is formed of fiberglass fabric.
Claim 10
Dependent Claim
22 words
A composite roof membrane as defined in claim 8 wherein the fabric fibers of said outer fabric layer are coated with Teflon.
Claim 11
Dependent Claim
22 words
A composite roof membrane as defined in claim 8 wherein the fabric fibers of said outer fabric layer are coated with silicone.
Claim 12
Dependent Claim
22 words
A composite roof membrane as defined in claim 1 including an unreinforced film positioned between the insulation and said outer fabric layer.
Claim 13
Dependent Claim
17 words
A composite roof membrane as defined in claim 11 wherein said unreinforced film is formed of Tedlar.
Claim 14
Dependent Claim
40 words
A composite roof membrane as defined in claim 11 including open webbing layers respectively located above said unreinforced film and between said insulation and said vapor barrier, said open webbing layers being tied together at spaced locations through the insulation.
Claim 15
Dependent Claim
77 words
A composite roof membrane for use in air supported and tensioned roof structures comprising an interior vapor barrier formed of a Tedlar film having a thickness of less than one mil. reinforced by an open polyester scrim; at least one intermediate layer of translucent flexible fiberglass insulating having a thickness of from one to four inches; and an outer fiberglass fabric layer wherein the fibers thereof are coated and the fabric is liquid impervious and vapor porous.
Claim 16
Dependent Claim
77 words
A composite roof membrane for use in air supported and tensioned roof structures comprising an interior vapor barrier formed of a Tedlar film having a thickness of less than one mil. reinforced by an open polyester scrim; at least one intermediate layer of translucent flexible fiberglass insulating having a thickness of from one to four inches; and an outer fiberglass fabric layer wherein the fibers thereof are coated and the fabric is liquid impervious and vapor porous.
Claim 17
Dependent Claim
33 words
A composite roof membrane as defined in claim 14 wherein said fiberglass fibers in said outer fabric are coated with one of the materials selected from the group consisting of Teflon and silicone.
Claim 18
Dependent Claim
21 words
A composite roof membrane as defined in claim 15 wherein said fiberglass insulation layer has an R value of about 3.5.
Claim 19
Dependent Claim
41 words
A composite roof membrane as defined in claim 15 wherein said open polyester scrim is formed of scrim fibers spaced about one inch apart to permit the sound to be transmitted through its associated film to the exterior of the building.
Claim 20
Dependent Claim
22 words
A composite roof membrane as defined in claim 17 including an unreinforced film positioned between the insulation and said outer fabric layer.
Claim 21
Dependent Claim
17 words
A composite roof membrane as defined in claim 18 wherein said unreinforced film is formed of Tedlar.
Claim 22
Dependent Claim
40 words
A composite roof membrane as defined in claim 19 including open webbing layers respectively located above said unreinforced film and between said insulation and said vapor barrier, said open webbing layers being tied together at spaced locations through the insulation.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |