Patent US3152991A successfully refreshed from Google Patents.
US3152991A
Expired / Lapsed
US
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Increasing the base number of metal petroleum sulfonate
Assignee: Phillips Petroleum Co
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Filing: 1961-01-23
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Granted: 1964-10-13
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 James T Gragson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:40
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
A PROCESS FOR INCREASING THE ALKALINE RESERVE OF A CALCIUM PETROLEUM SULFONATE WHICH COMPRISES CONTACTING 100 PARTS BY WEIGHT OF SUCH SULFONATE WITH 1 TO 20 PARTS BY WEIGHT OF CALCIUM CARBONATE, 0.5 TO 5 PARTS BY WEIGHT OF AN ALKALI METAL HYDROXIDE IN THE PRESENCE OF 2 TO 200 PARTS BY WEIGHT OF A LOWER ALKALOL HAVING 1-4 CARBON ATOMS PER MOLECULE AND 50 AND 250 PARTS OF WATER.
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |