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US3303149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt copolymer compositions
Assignee: Shell USA Inc
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Filing: 1962-04-19
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Granted: 1967-02-07
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Dale F Fink
- 👤 Charles C Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:06
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
170 words
AN ASPHALT COMPOSITION COMPRISING A MAJOR AMOUNT OF AN ASPHALT, A MINOR AMOUNT OF A HYDROCARBON WAX, SAID WAX BEING PRESENT IN AN AMOUNT BETWEEN ABOUT 1% AND 20% BY WEIGHT OF THE COMBINED ASPHALT AND WAX, AND BETWEEN ABOUT 0.01% AND 2.5% BY WEIGHT OF A COPOLYMER OF ETHYLENE WITH AN ESTER OF A C2-6 ALIPHATIC ALCOHOL AND A C2-6 ALIPHATIC MONOCARBOXYLIC ACID, SAID ESTER CONTAINING ONE CARBON-TO-CARBON DOUBLE BOND, SAID MONOCARBOXYLIC ACID BEING A C3-6 ACRYLIC ACID WHEN THE CARBON-TO-CARBON DOUBLE BOND IS CONTAINED IN THE ACID PORTION OF SAID ESTER, SAID ALIPHATIC ALCOHOL BEING VINYL ALCOHOL WHEN THE CARBON-TO-CARBON DOUBLE BOND IS CONTAINED IN THE ALCOHOL PORTION OF SAID ESTER, SAID COPOLYMER HAVING AN ESTER CONTENT OF FROM 5 TO 30% BY WEIGHT WHEN THE DOUBLE BOND IS IN THE ACID PORTION OF SAID ESTER AND AN ESTER CONTENT OF FROM 15-40% BY WEIGHT WHEN THE DOUBLE BOND IS IN THE ALCOHOL PORTION OF SAID ESTER, SAID COPOLYMER HAVNG AN AVERAGE MOLECULAR WEIGHT OF 1X104 TO 1X10**6.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |