US3632418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin fibers impregnated with asphaltite and asphalt
Assignee: Phillips Petroleum Co
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Filing: 1967-12-26
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Granted: 1972-01-04
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Expires: 1987-12-26
Abstract
Abstract A fabric, e.g., polypropylene fabric, is impregnated with a refined asphalt and an asphaltite such as Gilsonite, thus preparing a composite suitable for use as liner in a pond, as pavement surfacing, e.g., parking lot, driveway, play area surface, roofing or other covering or waterproofing material, or for molding to produce a molded body such as, e.g., construction blocks and structural forms. The asphaltite raises the ring and ball softening point of a straight asphalt system reducing cold flow and bettering weathering properties. The asphaltite can be used in cutbacks and emulsions and applied to one or more fabrics which can be the same or different and which can be variously arranged.
Inventors
- 👤 Homer L Draper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:03
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/16; E01C11/165; D; D06; D06N; D06N5/00; E04; E04D; E04D5/00; E04D5/02; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2221; Y10T442/2254
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A composite structure consisting essentially of a nonwoven fabric of polypropylene fiber having a weight of about 4 to 6 ounces per square yard, a tensile strength in the warp direction of 80 to 90 pounds and in the woof direction of about 90 to 100 pounds, and having the capacity of holding a relatively large proportion of asphalt material as compared with its volume; impregnated with an asphaltite having the following properties: Specific Gravity at 77* F. 1.03 to 1.20 Ring and Ball Softening Point, * F. 210 to 625 Solubility in Carbon Disulfide, %35 to 100 Penetration at 77* F. (100 g., 5 sec.) 0 to 20; and with an asphalt, The asphalt being a refined product having the following properties: Specific Gravity at 77* F. 0.95 to 1.05 Ring and Ball Softening Point, * F. 100 to 180 Solubility in Carbon Disulfide, %About 100 Penetration at 77* F. (100 g., 5 sec.) 30 to 200; the asphaltite being used at a rate of about 0.4 to about 0.8 gallons per square yard and the asphalt being used at a rate of about 0.3 to about 0.5 gallons per square yard.
Claim 2
Dependent Claim
48 words
A composite according to claim 2 wherein the refined asphalt is used in an amount of about 0.3 to about 0.5 gallon of an emulsion thereof per square yard and the asphaltite is used in an amount of about 0.4 to about 0.8 gallon emulsion per square yard.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |