US2861939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt oxidation
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1956-03-22
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Granted: 1958-11-25
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Expires: 1976-03-22
Abstract
No abstract record available.
Inventors
- 👤 Frank A Biribauer
- 👤 Gerard P Canevari
- 👤 Jr William Lockett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A CONTINUOUS PROCESS FOR THE OXIDATION OF ASPHALT WHEREIN PREHEATED ASPHALT IS FED INTO AN OXIDATION ZONE AND OXIDIZED ASPHALT IS TAKEN OFF AS A PRODUCT, AND WHEREIN THE EXOTHERMIC HEAT OF REACTION IS REMOVED BY WITHDRAWING A STREAM OF AT LEAST PARTIALLY OXIDIZED ASPHALT FROM SAID OXIDATION ZONE, COOLING SAID WITHDRAWN STREAM AND RECYCLING SAID COOLED STREAM TO SAID OXIDATION ZONE, THE IMPROVEMENT WHICH COMPRISES MIXING AN OXYGEN-CONTAINING GAS WITH A COOLED PORTION OF SAID WITHDRAWN STREAM, THE RESULTING OXIDATION THEREBY RAISING THE TEMPERATURE TO A LEVEL HIGHER THAN THAT EXISTING IN SAID OXIDATION ZONE, RAPIDLY QUENCHING THE RESULTING HEATED PORTION BY ADMIXING THEREWITH SUFFICIENT COOL ASPHALT TO LOWER THE TEMPERATURE OF THE RESULTING MIXTURE TO ABOUT THE TEMPERATURE MAINTAINED IN SAID OXIDIZING ZONE AND RECYCLING THE QUENCHED ASPHALT TO SAID OXIDIZING ZONE.
Claim 2
Dependent Claim
135 words
IN A CONTINUOUS PROCESS FOR THE OXIDATION OF ASPHALT WHEREIN PREHEATED ASPHALT IS FED INTO AN OXIDATION ZONE AND OXIDIZED ASPHALT IS TAKEN OFF AS A PRODUCT, AND WHEREIN THE EXOTHERMIC HEAT OF REACTION IS REMOVED BY WITHDRAWING A STREAM OF AT LEAST PARTIALLY OXIDIZED ASPHALT FROM SAID OXIDATION ZONE, COOLING SAID WITHDRAWN STREAM AND RECYCLING SAID COOLED STREAM TO SAID OXIDATION ZONE, THE IMPROVEMENT WHICH COMPRISES MIXING AN OXYGEN-CONTAINING GAS WITH A COOLED PORTION OF SAID WITHDRAWN STREAM, THE RESULTING OXIDATION THEREBY RAISING THE TEMPERATURE TO A LEVEL HIGHER THAN THAT EXISTING IN SAID OXIDATION ZONE, RAPIDLY QUENCHING THE RESULTING HEATED PORTION BY ADMIXING THEREWITH SUFFICIENT COOL ASPHALT TO LOWER THE TEMPERATURE OF THE RESULTING MIXTURE TO ABOUT THE TEMPERATURE MAINTAINED IN SAID OXIDIZING ZONE AND RECYCLING THE QUENCHED ASPHALT TO SAID OXIDIZING ZONE.
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US2029504A
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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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |