Patent US3615803A successfully refreshed from Google Patents.
US3615803A
Expired / Lapsed
US
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Asphalt-asbestos plastic cement
Assignee: Phillips Petroleum Co
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Filing: 1968-08-01
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Granted: 1971-10-26
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Expires: 1988-08-01
Abstract
Abstract An asphalt material such as an asphalt cement is combined with asbestos fibers and a solvent. There is contained in the final admixture a polymeric isobutylene in a minor amount of the order of about 0.1 to about 3 weight percent of the final mix, which upon evaporation of the solvent, is desirably cohesive and adhesive.
Inventors
- 👤 Homer L Draper
- 👤 Wayne E Mclaughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:16
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
A cement composition according to claim 1 wherein the asphalt cement is a refined petroleum asphalt cement with penetration at 77* F., as herein defined, in the range of from about 30 to about 70, and is present in an amount of at least 38 weight percent; the asbestos fibers are present in at least an amount of 25 weight percent, and the remainder of the composition is solvent.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |