US2865849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical insulating oils and method
Assignee: —
•
Filing: —
•
Granted: 1958-12-23
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Expires: 1975-12-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:24
CPC Classifications
C; C10; C10G; C10G67/00; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A PROCESS FOR THE PRODUCTION OF A NON-GASSING AND OXIDATION STABLE ELECTRICAL INSULATING OIL FROM A MINERAL OIL CONTAINING AT LEAST 35% AROMATICS AND 1% SULFUR AND HAVING A VISCOSITY BETWEEN 1* AND 9* ENGLER AT 20*C COMPRISING SPLITTING THE OIL INTO PORTIONS (A) AND (B), SEPARATELY TREATING OIL PORTION (A) BY CATALYTICALLY SELECTIVELY HYDROGENATING THE OIL TO SUBSTANTIALLY REDUCE THE SULFUR CONTENT WITHOUT ESSENTIALLY EFFECTING THE AROMATIC CONTENT OF THE OIL AND SEPARATELY TREATING OIL PORTION (B) WITH A SELECTIVE AROMATIC SOLVENT TO OBTAIN A RAFFINATE FRACTION AND SUBSEQUENTLY TREATING THESE TWO OIL PORTIONS (A) AND (B) WITH SULFURIC ACID, REMOVING THE SLUDGE FROM THE ACID TREATED OIL PORTIONS (A) AND (B), NEUTRALIZING THE ACID TREATED OIL MIXTURE (A) AND (B) AND THEREAFTER TREATING THE NEUTRALIZED OIL MIXTURE (A) AND (B) WITH A SOLID ABSORBENT, THE TREATED PRODUCTS OF OIL PORTION (A) AND OIL PORTION (B) BEING BLENDED IN PROPORTION OF FROM 80 TO 40 PARTS BY WEIGHT OF OIL (A) WITH FROM 20 TO 60 PARTS BY WEIGHT OF OIL (B).
Claim 2
Dependent Claim
173 words
A PROCESS FOR THE PRODUCTION OF A NON-GASSING AND OXIDATION STABLE ELECTRICAL INSULATING OIL FROM A MINERAL OIL CONTAINING AT LEAST 35% AROMATICS AND 1% SULFUR AND HAVING A VISCOSITY BETWEEN 1* AND 9* ENGLER AT 20*C COMPRISING SPLITTING THE OIL INTO PORTIONS (A) AND (B), SEPARATELY TREATING OIL PORTION (A) BY CATALYTICALLY SELECTIVELY HYDROGENATING THE OIL TO SUBSTANTIALLY REDUCE THE SULFUR CONTENT WITHOUT ESSENTIALLY EFFECTING THE AROMATIC CONTENT OF THE OIL AND SEPARATELY TREATING OIL PORTION (B) WITH A SELECTIVE AROMATIC SOLVENT TO OBTAIN A RAFFINATE FRACTION AND SUBSEQUENTLY TREATING THESE TWO OIL PORTIONS (A) AND (B) WITH SULFURIC ACID, REMOVING THE SLUDGE FROM THE ACID TREATED OIL PORTIONS (A) AND (B), NEUTRALIZING THE ACID TREATED OIL MIXTURE (A) AND (B) AND THEREAFTER TREATING THE NEUTRALIZED OIL MIXTURE (A) AND (B) WITH A SOLID ABSORBENT, THE TREATED PRODUCTS OF OIL PORTION (A) AND OIL PORTION (B) BEING BLENDED IN PROPORTION OF FROM 80 TO 40 PARTS BY WEIGHT OF OIL (A) WITH FROM 20 TO 60 PARTS BY WEIGHT OF OIL (B).
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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |