Patent US3694306A successfully refreshed from Google Patents.
US3694306A
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US
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Fire-resistant asbestos vapor barrier system
Assignee: Individual
•
Filing: 1971-03-04
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Granted: 1972-09-26
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Expires: 1991-03-04
Abstract
Abstract A LAYER OF ASPHALT IMPREGNATED ASBESTOS FELT IS ADHERED TO A METAL ROOF DECK BY NONCUMBUSTIBLE ADHESIVE AND A LAYER OF NONCOMBUSTIBLE INSULATING BOARDS IS ADHERED TO THE ASBESTOS FELT BY MOPPING ASPHALT. A CONVENTIONAL BUILT-UP ROOF CAN BE INSTALLED OVER THE INSULATING BOARDS.
Inventors
- 👤 Richard Leon Fricklas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:01
CPC Classifications
B; B32; B32B; B32B11/00; B32B11/10; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/941; B32B11/04; B32B11/048; B32B15/00; B32B15/14; B32B7/00; B32B7/04; B32B7/12; E04D; E04D11/00; E04D11/02; B32B2419/00; B32B2419/06; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31652; Y10T428/31656; Y10T428/31678; Y10T428/31717
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |