Patent US4158175A successfully refreshed from Google Patents.
Patent US2974107A successfully refreshed from Google Patents.
US2974107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of quick-breaking bituminous emulsions characterized by improved demulsibility
Assignee: California Research LLC
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Filing: 1959-01-27
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Granted: 1961-03-07
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Expires: 1979-01-27
Abstract
No abstract record available.
Inventors
- 👤 Edward W Mertens
- 👤 James R Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:48
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
A METHOD OF TREATING AN ASPHALT CHARACTERIZED BY AN ACID NUMBER OF AT LEAST 2.0, WHICH COMPRISES INTIMATELY CONTACTING SAID ASPHALT AT A TEMPERATURE FROM ABOUT 250 TO ABOUT 325*F. WITH A NITROGEN-CONTAINING MATERIAL CAPABLE TO FORM AMIDES WITH THE CARBOXYLIC ACIDS PRESENT IN THE ASPHALT AT THESE TEMPERATURES, SAID NITROGEN-CONTAINING MATERIAL BEING CONTACTED WITH THE ASPHALT IN AN AMOUNT AND FOR A PERIOD OF TIME SUFFICIENT TO REDUCE THE ACID NUMBER OF SAID ASPHALT TO A FIGURE WITHIN THE RANGE FROM 1.8 TO NOT LOWER THAN ABOUT 0.8.
Claim 2
Independent Claim
89 words
A METHOD OF TREATING AN ASPHALT CHARACTERIZED BY AN ACID NUMBER OF AT LEAST 2.0, WHICH COMPRISES INTIMATELY CONTACTING SAID ASPHALT AT A TEMPERATURE FROM ABOUT 250 TO ABOUT 325*F. WITH A NITROGEN-CONTAINING MATERIAL CAPABLE TO FORM AMIDES WITH THE CARBOXYLIC ACIDS PRESENT IN THE ASPHALT AT THESE TEMPERATURES, SAID NITROGEN-CONTAINING MATERIAL BEING CONTACTED WITH THE ASPHALT IN AN AMOUNT AND FOR A PERIOD OF TIME SUFFICIENT TO REDUCE THE ACID NUMBER OF SAID ASPHALT TO A FIGURE WITHIN THE RANGE FROM 1.8 TO NOT LOWER THAN ABOUT 0.8.
Claim 3
Dependent Claim
134 words
A PROCESS FOR THE PRODUCTION OF QUICK-BREAKING ASPHALT EMULSIONS, WHICH COMPRISES INTIMATELY CONTACTING AT A TEMPERATURE FROM ABOUT 250* TO 325*F. FOR AT LEAST 30 MINUTES AN ASPHALT CHARACTERIZED BY AN ACID NUMBER OF AT LEAST 2.0 WITH AN AMINO-NITROGEN-CONTAINING MATERIAL WHICH REACTS AT THESE TEMPERATURES WITH THE CARBOXYLIC ACIDS IN SAID ASPHALT TO FORM AMIDES, SAID MATERIAL BEING ADDED TO THE ASPHALT IN A SUFFICIENT AMOUNT TO REDUCE THE ACID NUMBER THEREOF TO A FIGURE IN THE RANGE FROM 1.8 TO NOT LOWER THAN ABOUT 0.8, AND EMULSIFYING FROM ABOUT 50 TO ABOUT 75% BY WEIGHT OF THE RESULTANT PRODUCT MIXTURE IN WATER WITH AN ALKALI METALEMULSIFYING BASE TO PRODUCE AN ASPHALT-IN-WATER EMULSION CHARACTERIZED BY VISCOSITY WHICH CONFORMS WITH ASTM SPECIFICATION D-977-53 FOR RAPID-SETTING EMULSIFIED ASPHALT, AND HAS A MINIMUM DEMULSIBILITY OF 60%.
Claim 4
Dependent Claim
134 words
A PROCESS FOR THE PRODUCTION OF QUICK-BREAKING ASPHALT EMULSIONS, WHICH COMPRISES INTIMATELY CONTACTING AT A TEMPERATURE FROM ABOUT 250* TO 325*F. FOR AT LEAST 30 MINUTES AN ASPHALT CHARACTERIZED BY AN ACID NUMBER OF AT LEAST 2.0 WITH AN AMINO-NITROGEN-CONTAINING MATERIAL WHICH REACTS AT THESE TEMPERATURES WITH THE CARBOXYLIC ACIDS IN SAID ASPHALT TO FORM AMIDES, SAID MATERIAL BEING ADDED TO THE ASPHALT IN A SUFFICIENT AMOUNT TO REDUCE THE ACID NUMBER THEREOF TO A FIGURE IN THE RANGE FROM 1.8 TO NOT LOWER THAN ABOUT 0.8, AND EMULSIFYING FROM ABOUT 50 TO ABOUT 75% BY WEIGHT OF THE RESULTANT PRODUCT MIXTURE IN WATER WITH AN ALKALI METALEMULSIFYING BASE TO PRODUCE AN ASPHALT-IN-WATER EMULSION CHARACTERIZED BY VISCOSITY WHICH CONFORMS WITH ASTM SPECIFICATION D-977-53 FOR RAPID-SETTING EMULSIFIED ASPHALT, AND HAS A MINIMUM DEMULSIBILITY OF 60%.
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |