US3821144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphaltic compositions
Assignee: Mobil Oil AS
•
Filing: 1973-03-30
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Granted: 1974-06-28
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Expires: 1993-03-30
Abstract
Abstract Asphaltic compositions, having improved elastic properties, are provided comprising a major amount of asphalt, a minor amount of a copolymer of ethylene and vinyl acetate and a minor amount of a synthetic terpenic resin.
Inventors
- 👤 A Goyer
- 👤 R Smadja
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:34
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
34 words
The asphaltic composition of claim 1 characterized in that the copolymer of ethylene and vinyl acetate comprises from about 10 to about 50 percent, by weight, of units derived from the copolymerized vinyl acetate.
Claim 2
Dependent Claim
26 words
The asphaltic composition of claim 1 characterized in that the copolymer of ethylene and vinyl acetate has a melt index from about 20 to about 30.
Claim 3
Dependent Claim
26 words
The asphaltic composition of claim 1 characterized in that the synethetic terpenic resin has a softening point (Ring and Ball) from about 50* to about 200*C.
Claim 4
Dependent Claim
24 words
The asphaltic composition of claim 1 characterized in that said asphalt has a softening point (Ring and Ball) from about 50* to about 200*C.
Claim 5
Dependent Claim
37 words
The asphaltic composition of claim 1 characterized in that said asphalt has a softening point (Ring and Ball) from about 43* to about 60*C. and an ASTM penetration index at 25*C. from about 40 to about 70.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |