US2980602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fractionating asphaltic bituminous materials utilizing aromatic hydrocarbons of less than ten carbon atoms
Assignee: KERRMCGEE OIL IND Inc
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Filing: 1958-05-13
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Granted: 1961-04-18
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Expires: 1978-05-13
Abstract
No abstract record available.
Inventors
- 👤 Garwin Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:02
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/08; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0403; B01D11/0407; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR SEPARATING A HEAVY FRACTION FROM ASPHALTIC BITUMINOUS MATERIAL AS A FLUID PHASE, WHICH COMPRISES TREATING EACH VOLUME OF AN ASPHALTIC BITUMINOUS MATERIAL WITH AT LEAST 22 VOLUMES OF A LIQUID AROMATIC HYDROCARBON SOLVENT CONTAINING LESS THAN 10 CARBON ATOMS PER MOLECULE AT ELEVATED TEMPERATURE AND PRESSURE, SAID TEMPERATURE BEING WITHIN THE PARACRITICAL RANGE FOR SAID SOLVENT, ADJUSTING THE PRESSURE TO OBTAIN A SOLVENT DENSITY GREATER THAN 0.30 G./ML. BUT LESS THAN 0.50 G./ML. AND SEPARATING THE RESULTING HEAVY FRACTION PHASE FROM THE SOLUTION PHASE.
Claim 2
Dependent Claim
87 words
A PROCESS FOR SEPARATING A HEAVY FRACTION FROM ASPHALTIC BITUMINOUS MATERIAL AS A FLUID PHASE, WHICH COMPRISES TREATING EACH VOLUME OF AN ASPHALTIC BITUMINOUS MATERIAL WITH AT LEAST 22 VOLUMES OF A LIQUID AROMATIC HYDROCARBON SOLVENT CONTAINING LESS THAN 10 CARBON ATOMS PER MOLECULE AT ELEVATED TEMPERATURE AND PRESSURE, SAID TEMPERATURE BEING WITHIN THE PARACRITICAL RANGE FOR SAID SOLVENT, ADJUSTING THE PRESSURE TO OBTAIN A SOLVENT DENSITY GREATER THAN 0.30 G./ML. BUT LESS THAN 0.50 G./ML. AND SEPARATING THE RESULTING HEAVY FRACTION PHASE FROM THE SOLUTION PHASE.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |