Patent US2728682A successfully refreshed from Google Patents.
US2728682A
Expired / Lapsed
US
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Asphalt compositions
Assignee: Standard Oil Co
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Filing: 1952-06-18
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Granted: 1955-12-27
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Expires: 1972-06-18
Abstract
No abstract record available.
Inventors
- 👤 Mathew L Kalinowski
- 👤 Lowell T Crews
- 👤 Frederick H Maclaren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A BITUMEN COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF A BITUMEN AND FROM ABOUT 0.25% TO ABOUT 5% OF THE OIL-SOLUBLE REACTION PRODUCT ESSENTIALLY FREE OF AMIDO GROUPS OBTAINED BY REACTING AN ALIPHATIC POLYAMINE AND A CARBOXYLIC ACID PITCH SELECTED FROM THE GROUP CONSISTING OF TALL OIL PITCH AND HYDROGENATED FISH OIL FATTY ACID PITCH AT A TEMPERATURE OF FROM ABOUT 180*F. TO ABOUT 265*F. FOR NOT MORE THAN ABOUT ONE AND ONE-HALF HOURS, AND THEN RAPIDLY REDUCING THE TEMPERATURE TO BELOW ABOUT 170*F.
Claim 2
Dependent Claim
85 words
A BITUMEN COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF A BITUMEN AND FROM ABOUT 0.25% TO ABOUT 5% OF THE OIL-SOLUBLE REACTION PRODUCT ESSENTIALLY FREE OF AMIDO GROUPS OBTAINED BY REACTING AN ALIPHATIC POLYAMINE AND A CARBOXYLIC ACID PITCH SELECTED FROM THE GROUP CONSISTING OF TALL OIL PITCH AND HYDROGENATED FISH OIL FATTY ACID PITCH AT A TEMPERATURE OF FROM ABOUT 180*F. TO ABOUT 265*F. FOR NOT MORE THAN ABOUT ONE AND ONE-HALF HOURS, AND THEN RAPIDLY REDUCING THE TEMPERATURE TO BELOW ABOUT 170*F.
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |