US3832200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of bituminous paving compositions and compositions obtained thereby
Assignee: CO FR DE RAFFINAGE SA
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Filing: 1972-06-14
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Granted: 1974-08-27
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Expires: 1992-06-14
Abstract
Abstract BITUMIOUS PAVING COMPOSITIONS COMPRISING A DRY MINERAL AGGREGATE, A DRY FILLER, A PREHEATED BITUMINOUS BINDER AND HARD ASPHALTS IN THE FORM OF A NON-PREHEATED POWDER ARE PREPARED BY MIXING SAID COMPONENTS IN ANY ORDER AT A TEMPERATURE IN THE RANGE OF ABOUT 140*C. TO ABOUT 210*C., PREFERABLY 180* TO 205*C. THE HARD ASPHALTS PREFERABLY CONTAIN AT LEAST 40% BY WEIGHT OF HARD ASPHALTENES AND NO MORE THAN 30% BY WEIGHT OF CARBOIDS. THE HARD ASPHALTS MAY BE PRECIPATED AROUND PARTICLES OF FILLER BY ADDING NORMAL HEXANE TO A SUSPENSION OF THE FILLER IN A BENZENE SOLUTION OF ASPHALTS.
Inventors
- 👤 M Kennel
- 👤 J Quiquerez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:45
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1059; E01C19/1068; E01C19/1072; C; C08; C08L; C08L95/00; E01C7/00; E01C7/08; E01C7/18
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |