US3677878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated insulated and weatherproof roof system
Assignee: Beazer East Inc
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Filing: 1971-02-02
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Granted: 1972-07-18
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Expires: 1991-02-02
Abstract
Abstract AN INTEGRATED, INSULATED AND WEATHERPROOF ROOF SYSTEM HAS A BASE, A FIRST MONOLITHIC MASS, SUPPORTED BY THE BASE COMPOSED OF A LOW-DENSITY CONCRETE COMPOSITION AND A SECOND MONOLITHIC MASS ON A SURFACE OF THE FIRST MASS COMPOSED OF A BITUMINOUS MATERIAL THAT IS MECHANICALLY BONDED TO THE SURFACE OF THE FIRST MASS. THE ROOF SYSTEM IS FORMED FROM INITIALLY FLOWABLE MATERIALS BY FORMING ON A BASE A SLURRY CEMENT, EXPANDED BEADS OF A THERMOPLASTIC MATERIAL AND WATER, CURING THE SLURRY TO A SOLID MONOLITHIC MASS AND FORMING A LAYER OF A HOT BITUMINOUS MATERIAL ON A SURFACE OF THE SOLID MASS.
Inventors
- 👤 John David Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:18
CPC Classifications
E; E04; E04D; E04D7/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249968; Y10T428/249971; Y10T428/249972; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/31504; Y10T428/31815; Y10T428/31819; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2098; Y10T442/2213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |