US4196013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant asphalt compositions
Assignee: Cabot Corp
•
Filing: 1978-10-23
•
Granted: 1980-04-01
•
Expires: 1998-10-23
Abstract
Abstract Disclosed herein are carbon black-containing asphalt compositions having improved properties of resistance to thermal and actinic oxidation.
Inventors
- 👤 Eli M. Dannenberg
- 👤 Frank R. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:02
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
A composition comprising petroleum asphalt having dispersed therein and in direct contact therewith particles of oil furnace carbon black in an amount effective to substantially improve the resistance of said asphalt to thermal and actinic oxidation and below an amount at which substantial physical reinforcement of said petroleum asphalt occurs.
Claim 2
Dependent Claim
50 words
A composition comprising petroleum asphalt having dispersed therein and in direct contact therewith particles of oil furnace carbon black in an amount effective to substantially improve the resistance of said asphalt to thermal and actinic oxidation and below an amount at which substantial physical reinforcement of said petroleum asphalt occurs.
Claim 3
Dependent Claim
25 words
The composition of claim 1 wherein said oil furnace carbon black has a BET-N 2 surface area of between 50 and 120 m 2 /g.
Claim 4
Dependent Claim
21 words
The composition of claim 1 wherein said oil furnace carbon black has a volatile content of at least 0.5% by weight.
Claim 5
Dependent Claim
30 words
The composition of claim 1 wherein said oil furnace carbon black is present in the amount of between about 2 and about 5 percent by weight of said petroleum asphalt.
Claim 6
Dependent Claim
13 words
The composition of claim 1 wherein said petroleum asphalt is a blown asphalt.
References Cited (Backward Citations)
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Cited
US4094697A
Cited
US4069181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |