US2920030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing corrosion
Assignee: Universal Oil Products Co
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Filing: 1955-09-15
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Granted: 1960-01-05
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Expires: 1975-09-15
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:34
CPC Classifications
C; C10; C10G; C10G7/00; C10G7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A METHOD OF PREVENTING CORROSION OF DISTILLATION AND CONNECTING COLLECTING EQUIPMENT AND OF SUBSEQUENT STORAGE EQUIPMENT USED IN THE REFINING OF HYDROCARBON OIL, WHEREIN SAID OIL IS SUBJECTED TO TREATMENT WITH AN ALKALINE AGENT BETWEEN THE COLLECTING AND STORAGE THEREOF, WHICH COMPRISES DISTILLING THE OIL IN THE PRESENCE OF A BASIC CORROSION INHIBITOR WHICH IS IN PART RETAINED IN A DISTILLATE PRODUCT OF SAID DISTILLATION AND SELECTED FROM THE GROUP CONSISTING OF AN IMIDAZOLINE, AN OIL-SOLUBLE ALKYL AMINE AND AN OIL-SOLUBLE ALKYLENE POLYAMINE, WHEREBY THE CORROSION OF SAID DISTILLATION AND OF SAID COLLECTING EQUIPMENT IS RETARDED, THEREAFTER SUBJECTING SAID DISTILLATE PRODUCT TO TREATMENT WITH AN ALKALINE AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE AND RETAINING AT LEAST A PORTION OF SAID BASIC CORROSION INHIBITOR IN SAID DISTILLATE PRODUCT, THEREAFTER COMMINGLING A LONG CHAIN CARBOXYLIC ACID WITH THE TREATED DISTILLATE PRODUCT CONTAINING BASIC CORROSION INHIBITOR IN A CONCENTRATION SUFFICIENT TO FORM A SALT OF THE BASIC CORROSION INHIBITOR, AND PASSING THE RESULTANT MIXTURE INTO STORAGE EQUIPMENT, SAID SALT SERVING AS AN INHIBITOR TO RETARD CORROSION OF SAID STORAGE EQUIPMENT.
Claim 2
Independent Claim
183 words
A METHOD OF PREVENTING CORROSION OF DISTILLATION AND CONNECTING COLLECTING EQUIPMENT AND OF SUBSEQUENT STORAGE EQUIPMENT USED IN THE REFINING OF HYDROCARBON OIL, WHEREIN SAID OIL IS SUBJECTED TO TREATMENT WITH AN ALKALINE AGENT BETWEEN THE COLLECTING AND STORAGE THEREOF, WHICH COMPRISES DISTILLING THE OIL IN THE PRESENCE OF A BASIC CORROSION INHIBITOR WHICH IS IN PART RETAINED IN A DISTILLATE PRODUCT OF SAID DISTILLATION AND SELECTED FROM THE GROUP CONSISTING OF AN IMIDAZOLINE, AN OIL-SOLUBLE ALKYL AMINE AND AN OIL-SOLUBLE ALKYLENE POLYAMINE, WHEREBY THE CORROSION OF SAID DISTILLATION AND OF SAID COLLECTING EQUIPMENT IS RETARDED, THEREAFTER SUBJECTING SAID DISTILLATE PRODUCT TO TREATMENT WITH AN ALKALINE AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE AND RETAINING AT LEAST A PORTION OF SAID BASIC CORROSION INHIBITOR IN SAID DISTILLATE PRODUCT, THEREAFTER COMMINGLING A LONG CHAIN CARBOXYLIC ACID WITH THE TREATED DISTILLATE PRODUCT CONTAINING BASIC CORROSION INHIBITOR IN A CONCENTRATION SUFFICIENT TO FORM A SALT OF THE BASIC CORROSION INHIBITOR, AND PASSING THE RESULTANT MIXTURE INTO STORAGE EQUIPMENT, SAID SALT SERVING AS AN INHIBITOR TO RETARD CORROSION OF SAID STORAGE EQUIPMENT.
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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |