US2943990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for preparing sulfur-chlorinated cutting oils
Assignee: Sinclair Refining Co
•
Filing: 1956-01-20
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Granted: 1960-07-05
•
Expires: 1976-01-20
Abstract
No abstract record available.
Inventors
- 👤 Maurice K Rausch
- 👤 Thomas A Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:28
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C07; C07C; C07C309/00; C07C309/78; C07C309/79; C07C309/80; C10G21/12; C10G21/27; C10M; C10M135/00; C10M135/02; C10M2219/00; C10M2219/02; C10N; C10N2060/00; C10N2060/08; C10N2060/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD FOR PRODUCING A REACTIVE OIL PRODUCT OF LOW SLUDGE FORMING TENDENCIES FROM AN EXTRACT OIL OBTAINED IN THE EXTRACTION OF A LUBRICATING OIL STOCK WITH A SOLVENT SELECTIVE FOR AROMATICS TO PRODUCE A PRIMARY RAFFINTE OIL AND SAID EXTRACT OIL AND A PARAFFIN DISTRACTING WITH A SOLVENT SELECTIVE FOR AROMATICS A MATERIAL CONSISTING ESSENTIALLY OF SAID EXTRACT OIL AND A PARAFFIN DISTILLATE, SAID EXTRACT BEING PRESENT IN AN AMOUNT OF AT LEAST 25 VOLUME PERCENT OF THE TOTAL, TO PRODUCE A SECONDARY RAFFINATE OIL IN A YIELD OF ABOUT 20 TO 90 VOLUME PERCENT OF THE MATERIAL TREATED CONTAINING ABOUT 20 TO 40 VOLUME PERCENT OF THE EXTRACT.
Claim 2
Independent Claim
110 words
A METHOD FOR PRODUCING A REACTIVE OIL PRODUCT OF LOW SLUDGE FORMING TENDENCIES FROM AN EXTRACT OIL OBTAINED IN THE EXTRACTION OF A LUBRICATING OIL STOCK WITH A SOLVENT SELECTIVE FOR AROMATICS TO PRODUCE A PRIMARY RAFFINTE OIL AND SAID EXTRACT OIL AND A PARAFFIN DISTRACTING WITH A SOLVENT SELECTIVE FOR AROMATICS A MATERIAL CONSISTING ESSENTIALLY OF SAID EXTRACT OIL AND A PARAFFIN DISTILLATE, SAID EXTRACT BEING PRESENT IN AN AMOUNT OF AT LEAST 25 VOLUME PERCENT OF THE TOTAL, TO PRODUCE A SECONDARY RAFFINATE OIL IN A YIELD OF ABOUT 20 TO 90 VOLUME PERCENT OF THE MATERIAL TREATED CONTAINING ABOUT 20 TO 40 VOLUME PERCENT OF THE EXTRACT.
References Cited (Backward Citations)
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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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |