US3633659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof constructions
Assignee: SISENCA
•
Filing: 1970-01-16
•
Granted: 1972-01-11
•
Expires: 1990-01-16
Abstract
Abstract A roof construction comprises interconnected corrugated panels and an insulated outer roofing, and the channels formed between the outer roofing the the corrugations of the panels are connected to a ventilating system for ventilating the roof.
Inventors
- 👤 Jarl-Erik Ohlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:16
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/17
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A roof construction comprising interconnected sheet metal panels having trapeziform corrugations, an insulated outer roofing placed directly on said panels positioned to be supported by them wherein the insulation of said outer roofing is facing said panels and bears directly against them, channels formed between the insulation and said corrugations of said panels connected by a duct system to the ambient air outside the building with said air supplied over heating means to said channels between said insulation and said corrugations of said panels for ventilating said insulation.
Claim 2
Dependent Claim
88 words
A roof construction comprising interconnected sheet metal panels having trapeziform corrugations, an insulated outer roofing placed directly on said panels positioned to be supported by them wherein the insulation of said outer roofing is facing said panels and bears directly against them, channels formed between the insulation and said corrugations of said panels connected by a duct system to the ambient air outside the building with said air supplied over heating means to said channels between said insulation and said corrugations of said panels for ventilating said insulation.
Claim 3
Dependent Claim
40 words
A roof construction as claimed in claim 1, wherein said duct system includes a duct cooperating with said channels and connected via throttling means to said channels so as to produce a predetermined distribution of the air between said channels.
Claim 4
Dependent Claim
41 words
A roof construction as claimed in claim 2, wherein said channels are connected with their one ends to said duct while the other ends of said channels are in communication with the interior of the building equipped with the roof construction.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |