Patent US2680716A successfully refreshed from Google Patents.
US2680716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making sulfonates suitable for use in soluble oil
Assignee: Sunoco Inc
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Filing: 1951-09-12
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Granted: 1954-06-08
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Expires: 1971-09-12
Abstract
No abstract record available.
Inventors
- 👤 Lipkin Moses Robert
- 👤 Reif Henry Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:33
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
METHOD FOR PREPARING SOLUBLE OIL WHICH COMPRISES: SULFONATING MINERAL LUBRICATING OIL HAVING S. U. VISCOSITY AT 100* F. WITHIN THE APPROXIMATE RANGE 200-1000 SECONDS, WITH GASEOUS SO3 AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE 180* F. TO 300* F., WHILE MAINTAINING THE RATIO OF GASEOUS SO3 TO OIL WITHIN THE RANGE FROM 0.1 TO 2.5 MOLES OF GASEOUS SO3 PER MOLE OF AROMATICS IN THE OIL, THEREBY TO PRODUCE MAHONGANY SULFONIC ACIDS; SEPARATING SAID MAHOGANY SULFONIC ACIDS FROM GREEN SULFONIC ACIDS; SAPONIFYING SUCH SEPARATED MAHOGANY SULFONIC ACIDS WITH AN ALKALI METAL BASE, THEREBY TO FORM ALKALI METAL MAHOGANY SULFONATES; AND BLENDING PETROLEUM OIL WITH THE SAPONIFIED MAHOGANY SULFONIC ACIDS TO OBTAIN A SOLUBLE OIL CONTAINING A MAJOR PROPORTION OF PETROLEUM OIL.
Claim 2
Dependent Claim
121 words
METHOD FOR PREPARING SOLUBLE OIL WHICH COMPRISES: SULFONATING MINERAL LUBRICATING OIL HAVING S. U. VISCOSITY AT 100* F. WITHIN THE APPROXIMATE RANGE 200-1000 SECONDS, WITH GASEOUS SO3 AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE 180* F. TO 300* F., WHILE MAINTAINING THE RATIO OF GASEOUS SO3 TO OIL WITHIN THE RANGE FROM 0.1 TO 2.5 MOLES OF GASEOUS SO3 PER MOLE OF AROMATICS IN THE OIL, THEREBY TO PRODUCE MAHONGANY SULFONIC ACIDS; SEPARATING SAID MAHOGANY SULFONIC ACIDS FROM GREEN SULFONIC ACIDS; SAPONIFYING SUCH SEPARATED MAHOGANY SULFONIC ACIDS WITH AN ALKALI METAL BASE, THEREBY TO FORM ALKALI METAL MAHOGANY SULFONATES; AND BLENDING PETROLEUM OIL WITH THE SAPONIFIED MAHOGANY SULFONIC ACIDS TO OBTAIN A SOLUBLE OIL CONTAINING A MAJOR PROPORTION OF PETROLEUM OIL.
References Cited (Backward Citations)
US1909721A
Cited
US2205924A
Cited
US2361476A
Cited
US2413311A
Cited
US2514733A
Cited
US2499710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |