US3144423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt composition containing atactic polypropylene
Assignee: Sunoco Inc
•
Filing: 1960-08-29
•
Granted: 1964-08-11
•
Expires: 1980-08-29
Abstract
No abstract record available.
Inventors
- 👤 Steven G Belak
- 👤 William J Stout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:15
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
AS A NEW COMPOSITION, A MIXTURE OF ASPHALT AND ATACTIC POLYPROPYLENE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 17,000 TO ABOUT 25,000 OBTAINED FROM THE STEREOSPECIFIC POLYMERIZATION OF PROPYLENE, THE CONTENT OF ATACTIC POLYPROPYLENE IN THE MIXTURE BEING IN THE RANGE OF 1-20% BY WEIGHT AND SUCH THAT THE PENETRATION @ 77*F. IS IN THE RANGE OF 70-120 AND THE PENETRATION RATIO IS AT LEAST 30.
Claim 2
Dependent Claim
66 words
AS A NEW COMPOSITION, A MIXTURE OF ASPHALT AND ATACTIC POLYPROPYLENE HAVING A MOLECULAR WEIGHT OF FROM ABOUT 17,000 TO ABOUT 25,000 OBTAINED FROM THE STEREOSPECIFIC POLYMERIZATION OF PROPYLENE, THE CONTENT OF ATACTIC POLYPROPYLENE IN THE MIXTURE BEING IN THE RANGE OF 1-20% BY WEIGHT AND SUCH THAT THE PENETRATION @ 77*F. IS IN THE RANGE OF 70-120 AND THE PENETRATION RATIO IS AT LEAST 30.
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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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |