US4130516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High ductility asphalt
Assignee: Phillips Petroleum Co
•
Filing: 1976-04-12
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Granted: 1978-12-19
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Expires: 1996-04-12
Abstract
Abstract An asphalt composition having high ductility at low temperatures is obtained by hot-mixing asphalt and 3 to 7 wt. % of sulfur, based on the weight of asphalt, at temperatures below 300° F. Small amounts of rubber further increase the ductility.
Inventors
- 👤 Duane W. Gagle
- 👤 Homer L. Draper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:09
CPC Classifications
C; C08; C08L; C08L95/00; C08K; C08K3/00; C08K3/02; C08K3/06; C08L21/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
41 words
A composition of matter obtained by hot-blending asphalt and about 5 wt. % of sulfur at a temperature below 300° F. further comprising about 1 wt. % of a rubber selected from the group consisting of natural rubber and synthetic rubber.
Claim 2
Dependent Claim
41 words
A composition of matter obtained by hot-blending asphalt and about 5 wt. % of sulfur at a temperature below 300° F. further comprising about 1 wt. % of a rubber selected from the group consisting of natural rubber and synthetic rubber.
Claim 3
Dependent Claim
15 words
A composition in accordance with claim 1 wherein said rubber is a linear butadiene/styrene copolymer.
Claim 4
Dependent Claim
49 words
A process for the production of an asphalt composition which comprises hot-blending asphalt and about 5 wt. % of sulfur at a temperature below 300° F. and incorporating about 1 wt. % of a rubber selected from the group consisting of natural rubber and synthetic rubber into the composition.
Claim 5
Dependent Claim
49 words
A process for the production of an asphalt composition which comprises hot-blending asphalt and about 5 wt. % of sulfur at a temperature below 300° F. and incorporating about 1 wt. % of a rubber selected from the group consisting of natural rubber and synthetic rubber into the composition.
Claim 6
Dependent Claim
15 words
A process in accordance with claim 3 wherein said rubber is a linear butadiene/styrene copolymer.
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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) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |