Patent US2799455A successfully refreshed from Google Patents.
US3281256A
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Process for manufacturing prehardened asphalt solid compositions
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1963-03-29
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Granted: 1966-10-25
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Expires: 1983-03-29
Abstract
No abstract record available.
Inventors
- 👤 Dilworth T Rogers
- 👤 John C Munday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:40
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/34; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR THE MANUFACTURE OF A HARD BITUMINOUS SOLID COMPOSITION WHICH COMPRISES THE STEPS OF: (A) MIXING SOIL WITH ABOUT 8 TO 30 WT. PERCENT OF A BITUMINOUS BINDER BASED ON THE SOIL, (B) PREHARDENING THE MIXTURE BY HEATING AT A TEMPERATURE IN THE RANGE FROM ABOUT 250* TO 400*F. FOR A TIME IN THE RANGE OF 1 TO 240 MINUTES IN A GASEOUS ATMOSPHERE SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF AIR, OXYGEN AND NITROGEN, (C) COMPRESSING THE MIXTURE TO FROM ABOUT 80 TO 98% OF ITS THEORECTIAL DENSITY, AND (D) CURING THE COMPRESSED MIXTURE BY HEATING IN AIR TO A TEMPERATUTE IN THE RANGE FROM ABOUT 300* TO 500*F. FOR FROM 4 TO 80 HOURS.
Claim 2
Dependent Claim
118 words
A PROCESS FOR THE MANUFACTURE OF A HARD BITUMINOUS SOLID COMPOSITION WHICH COMPRISES THE STEPS OF: (A) MIXING SOIL WITH ABOUT 8 TO 30 WT. PERCENT OF A BITUMINOUS BINDER BASED ON THE SOIL, (B) PREHARDENING THE MIXTURE BY HEATING AT A TEMPERATURE IN THE RANGE FROM ABOUT 250* TO 400*F. FOR A TIME IN THE RANGE OF 1 TO 240 MINUTES IN A GASEOUS ATMOSPHERE SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF AIR, OXYGEN AND NITROGEN, (C) COMPRESSING THE MIXTURE TO FROM ABOUT 80 TO 98% OF ITS THEORECTIAL DENSITY, AND (D) CURING THE COMPRESSED MIXTURE BY HEATING IN AIR TO A TEMPERATUTE IN THE RANGE FROM ABOUT 300* TO 500*F. FOR FROM 4 TO 80 HOURS.
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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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |