Patent EP0157469A1 successfully refreshed from Google Patents.
US3145161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of electrical and refrigerator oils
Assignee: Sunoco Inc
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Filing: 1962-11-26
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Granted: 1964-08-18
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Expires: 1982-11-26
Abstract
No abstract record available.
Inventors
- 👤 Frank E Anderson
- 👤 Ivor W Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:03
CPC Classifications
C; C10; C10G; C10G53/00; C10G67/00; C10G71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
METHOD OF PREPARING ELECTIRCAL AND REFRIGERATOR OILS COMPRISING THE STEPS OF (1) TRATING A MINERAL DISTILLATE OIL HAVING A VISCOSITY-GRAVITY CONSTANT IN THE RANGE OF 0.84 TO 0.92 WITH 5-30 POUNDS OF CONCENTRATED SULFURIC ACID PER BARREL OF OIL, SAID TREATING BEING AT A TEMPERATURE IN THE RANGE OF 70*-200*F., (2) NEUTRALIZING THE ACIDTREATED OIL, (3) CONTACTING THE ACID-TREATED, NEUTRALIZED OIL IN LIQUID PHASE AT A TEMPERATURE IN THE RANGE OF 100* F. TO 500*F. WITH 0.3-5.0 PERCENT BY WEIGHT OF COPPER METAL BASED ON THE OIL, SAID COPPER METAL BEING DEPOSITED ON AN INERT SUPPORT, AND (4) TREATING THE ACID-TREATED, NEUTRALIZED, COPPER CONTACTED OIL WITH ADSORPTIVE CLAY.
Claim 2
Dependent Claim
108 words
METHOD OF PREPARING ELECTIRCAL AND REFRIGERATOR OILS COMPRISING THE STEPS OF (1) TRATING A MINERAL DISTILLATE OIL HAVING A VISCOSITY-GRAVITY CONSTANT IN THE RANGE OF 0.84 TO 0.92 WITH 5-30 POUNDS OF CONCENTRATED SULFURIC ACID PER BARREL OF OIL, SAID TREATING BEING AT A TEMPERATURE IN THE RANGE OF 70*-200*F., (2) NEUTRALIZING THE ACIDTREATED OIL, (3) CONTACTING THE ACID-TREATED, NEUTRALIZED OIL IN LIQUID PHASE AT A TEMPERATURE IN THE RANGE OF 100* F. TO 500*F. WITH 0.3-5.0 PERCENT BY WEIGHT OF COPPER METAL BASED ON THE OIL, SAID COPPER METAL BEING DEPOSITED ON AN INERT SUPPORT, AND (4) TREATING THE ACID-TREATED, NEUTRALIZED, COPPER CONTACTED OIL WITH ADSORPTIVE CLAY.
References Cited (Backward Citations)
US685907A
Cited
US2276526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |