Patent US3864157A successfully refreshed from Google Patents.
US3864157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impervious barrier comprising polyolefin fabric, asphalt and asbestos
Assignee: Phillips Petroleum Co
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Filing: 1971-12-14
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Granted: 1975-02-04
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Expires: 1991-12-14
Abstract
Abstract An impervious cover structure is produced by laying a polyolefin fabric fused on one side only, fused side against the surface to be covered and the unfused side is coated with a mixture containing asphalt and asbestos fibers.
Inventors
- 👤 Clarence R Bresson
- 👤 Forrest D Spaulding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:15
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/022; E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; E02B3/122; E02B3/126; B32B17/00; B32B17/02; E04; E04B; E04B1/00; E04B1/62; E04B1/66; B32B2262/00; B32B2262/02; B32B2262/0253; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
88 words
A METHOD OF PROVIDING A SURFACE COVERING COMPRISING A NON-WOVEN POLYOLEFIN FABRIC, MAT OR WEB, FUSED EXTERNALLY ON ONE SIDE AND HAVING UNFUSED FIBER ON THE OTHER EXTERNAL SIDE, WHICH METHOD COMPRISES PLACING SAID POLYOLEFIN FABRIC, MAT OR WEB, WHICH CAN BE NEEDLE-PUNCHED, AGAINST A SURFACE TO BE RENDERED IMPERVIOUS TO FLUIDS, THE SIDE OF THE FABRIC PLACED AGAINST THE SURFACE TO BE COVERED HAVING BEEN FUSED AND THEN COATING THE OTHER SIDE OF THE FABRIC WHICH PRESENTS UNFUSED FIBERS WITH A MIXTURE CONTAINING ASPHALT AND ASBESTOS FIBERS.
Claim 2
Independent Claim
88 words
A METHOD OF PROVIDING A SURFACE COVERING COMPRISING A NON-WOVEN POLYOLEFIN FABRIC, MAT OR WEB, FUSED EXTERNALLY ON ONE SIDE AND HAVING UNFUSED FIBER ON THE OTHER EXTERNAL SIDE, WHICH METHOD COMPRISES PLACING SAID POLYOLEFIN FABRIC, MAT OR WEB, WHICH CAN BE NEEDLE-PUNCHED, AGAINST A SURFACE TO BE RENDERED IMPERVIOUS TO FLUIDS, THE SIDE OF THE FABRIC PLACED AGAINST THE SURFACE TO BE COVERED HAVING BEEN FUSED AND THEN COATING THE OTHER SIDE OF THE FABRIC WHICH PRESENTS UNFUSED FIBERS WITH A MIXTURE CONTAINING ASPHALT AND ASBESTOS FIBERS.
Claim 3
Dependent Claim
112 words
A method according to claim 1 wherein the fabric is polypropylene fabric made by needle punching together a mass of non-woven fibers and wherein the asphalt-asbestos mixture is cut-back with a sufficient amount of a solvent or oil to make the resultant blend applicable to said other external side by hot application at a temperature below that which will adversely melt said polyolefin fabric, mat or web, and the cut-back asphalt-asbestos mixture is applied to said other side at the rate of approximately 3-5 pounds per square yard of the fabric of the asphaltic mixture, and the mixture applied to said other side is allowed to cure in air at ambient temperature.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |