US3150201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction process
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1961-06-07
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Granted: 1964-09-22
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Expires: 1981-06-07
Abstract
No abstract record available.
Inventors
- 👤 William R Edwards
- 👤 Robert D Wesselhoft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:15
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; C07C7/171
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
IN THE THERMAL REGENERATION OF TERIARY ISOAMYLENE FROM A 62 WEIGHT PERCENT TO 70 WEIGHT PERCENT SULFURIC ACID, THE IMPROVEMENT WHICH COMPRISES HETING THE ACID TO A FINAL TEMPERATURE OF AT LEAST 180*F. AT WHICH THE ISOAMYLENE IS SUBSTANTIALLY COMPLETELY REGENERATED, AND AT A HEATING RATE OF AT LEAST 200*F. PER MINUTE, WHEREBY POLYMERIZATION LOSSES ARE MINIMIZED.
Claim 2
Dependent Claim
57 words
IN THE THERMAL REGENERATION OF TERIARY ISOAMYLENE FROM A 62 WEIGHT PERCENT TO 70 WEIGHT PERCENT SULFURIC ACID, THE IMPROVEMENT WHICH COMPRISES HETING THE ACID TO A FINAL TEMPERATURE OF AT LEAST 180*F. AT WHICH THE ISOAMYLENE IS SUBSTANTIALLY COMPLETELY REGENERATED, AND AT A HEATING RATE OF AT LEAST 200*F. PER MINUTE, WHEREBY POLYMERIZATION LOSSES ARE MINIMIZED.
References Cited (Backward Citations)
US2968682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |