US2939838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petroleum treating process
Assignee: Texaco Inc
•
Filing: 1957-06-24
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Granted: 1960-06-07
•
Expires: 1977-06-24
Abstract
No abstract record available.
Inventors
- 👤 Robert L Murphey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:26
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
A METHOD OF TREATING A HEAVY ASPHALTIC PETROLEUM FRACTION WHICH COMPRISES SEPARATING SAID FRACTION INTO A HEAVY DISTILLATE FRACTION AND AN ASPHALTIC RESIDUUM SUBJECTING SAID HEAVY DISTILLATE FRACTION TO CONTACT WITH LIQUEFIED PROPANE UNDER SEVERE CONDITIONS AT A LIQUID PROPANE TO CHARGE RATIO IN THE RANGE 8-10 AND AT A TEMPERATURE IN THE RANGE 180-205* F. TO YIELD A SOLVENT FRACTIONATED OIL AND A BOTTOMS ASPHALTIC FRACTION, SAID SOLVENT FRACTIONATED OIL BEING RECOVERED FROM THE AFORESAID PROPANE SOLVENT FRACTIONATION OPERATION IN AN AMOUNT BELOW ABOUT 34% BASED ON SAID HEAVY DISTILLATE FRACTION, CHARGED THERETO, SUBJECTING SAID SOLVENT FRACTIONATED OIL TO CONTACT WITH A LIQUID SOLVENT WHICH IS SELECTIVE FOR AROMATIC HYDROCARBONS TO YIELD A SOLVENT FRACTIONATED RAFFINATE, DEWAXING SAID RAFFINATE TO YIELD A DEWAXED SOLVENT FRACTIONATED RAFFINATE, SOLVENT DEASPHALTING SAID ASPHALTIC RESIDUUM TO YIELD A DEASPHALTED OIL, SUBJECTING SAID DEASPHALTED OIL TO CONTACT WITH A LIQUID SOLVENT WHICH IS SELECTIVE FOR AROMATIC HYDROCARBONS TO YIELD A DEASPHALTED RAFFINATE, DEWAXING SAID DEASPHALTED RAFFINATE TO YIELD A DEWAXED DEASPHALTED RAFFINATE, COMBINING THE AFORESAID DEWAXED SOLVENT FRACTIONATED RAFFINATE AND THE AFORESAID DEWAXED DEASPHALTED RAFFINATE AND SUBJECTING THE RESULTING COMBINED RAFFINATE TO CLAY CONTACTING TO YIELD A FINISHED DEWAXED REFINED PRODUCT OIL.
Claim 2
Independent Claim
198 words
A METHOD OF TREATING A HEAVY ASPHALTIC PETROLEUM FRACTION WHICH COMPRISES SEPARATING SAID FRACTION INTO A HEAVY DISTILLATE FRACTION AND AN ASPHALTIC RESIDUUM SUBJECTING SAID HEAVY DISTILLATE FRACTION TO CONTACT WITH LIQUEFIED PROPANE UNDER SEVERE CONDITIONS AT A LIQUID PROPANE TO CHARGE RATIO IN THE RANGE 8-10 AND AT A TEMPERATURE IN THE RANGE 180-205* F. TO YIELD A SOLVENT FRACTIONATED OIL AND A BOTTOMS ASPHALTIC FRACTION, SAID SOLVENT FRACTIONATED OIL BEING RECOVERED FROM THE AFORESAID PROPANE SOLVENT FRACTIONATION OPERATION IN AN AMOUNT BELOW ABOUT 34% BASED ON SAID HEAVY DISTILLATE FRACTION, CHARGED THERETO, SUBJECTING SAID SOLVENT FRACTIONATED OIL TO CONTACT WITH A LIQUID SOLVENT WHICH IS SELECTIVE FOR AROMATIC HYDROCARBONS TO YIELD A SOLVENT FRACTIONATED RAFFINATE, DEWAXING SAID RAFFINATE TO YIELD A DEWAXED SOLVENT FRACTIONATED RAFFINATE, SOLVENT DEASPHALTING SAID ASPHALTIC RESIDUUM TO YIELD A DEASPHALTED OIL, SUBJECTING SAID DEASPHALTED OIL TO CONTACT WITH A LIQUID SOLVENT WHICH IS SELECTIVE FOR AROMATIC HYDROCARBONS TO YIELD A DEASPHALTED RAFFINATE, DEWAXING SAID DEASPHALTED RAFFINATE TO YIELD A DEWAXED DEASPHALTED RAFFINATE, COMBINING THE AFORESAID DEWAXED SOLVENT FRACTIONATED RAFFINATE AND THE AFORESAID DEWAXED DEASPHALTED RAFFINATE AND SUBJECTING THE RESULTING COMBINED RAFFINATE TO CLAY CONTACTING TO YIELD A FINISHED DEWAXED REFINED PRODUCT OIL.
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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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |