US2875157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resolving water-in-oil emulsions
Assignee: Visco Products Co
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Filing: 1956-03-16
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Granted: 1959-02-24
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Expires: 1976-03-16
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:58
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS OF RESOLVING WATER-IN-OIL EMULSIONS INTO THEIR COMPONENTS WHICH COMPRISES TREATING SUCH EMULSIONS WITH A COMPOSITION OF HIGH MOLECULAR WEIGHT HAVING A LONG OXYALKYLENE CHAIN CONNECTED TO AN AMINO GROUP OF A WATER SOLUBLE MONOAMINE IN WHICH OXYALKYLENE GROUP FROM THE CLASS CONSISTING OF OXYPROPYLENE AND BOTH OXYETHYLENE AND OXYPROPYLENE IN A WEIGHT RATIO OF OXYETHYLENE TO OXYPROPYLENE NOT EXCEEDING 4:1 IN THE SAME MOLECULAR FORM THE MAJOR PROPORTION OF THE AVERAGE MOLECULAR WEIGHT OF SAID COMPOSITION, AND THE AVERAGE MOLECULAR WEIGHT ATTRIBUTABLE TO SAID OXYALKYLENE GROUP IS AT LEAST 1000 WHERE THE OXYALKYLENE GROUPS ARE BOTH OXYETHYLENE AND OXYPROPYLENE AND AT LEAST 1200 WHERE THE OXYALKYLENE GROUPS ARE SOLELY OXYPROPYLENE GROUPS.
Claim 2
Dependent Claim
113 words
A PROCESS OF RESOLVING WATER-IN-OIL EMULSIONS INTO THEIR COMPONENTS WHICH COMPRISES TREATING SUCH EMULSIONS WITH A COMPOSITION OF HIGH MOLECULAR WEIGHT HAVING A LONG OXYALKYLENE CHAIN CONNECTED TO AN AMINO GROUP OF A WATER SOLUBLE MONOAMINE IN WHICH OXYALKYLENE GROUP FROM THE CLASS CONSISTING OF OXYPROPYLENE AND BOTH OXYETHYLENE AND OXYPROPYLENE IN A WEIGHT RATIO OF OXYETHYLENE TO OXYPROPYLENE NOT EXCEEDING 4:1 IN THE SAME MOLECULAR FORM THE MAJOR PROPORTION OF THE AVERAGE MOLECULAR WEIGHT OF SAID COMPOSITION, AND THE AVERAGE MOLECULAR WEIGHT ATTRIBUTABLE TO SAID OXYALKYLENE GROUP IS AT LEAST 1000 WHERE THE OXYALKYLENE GROUPS ARE BOTH OXYETHYLENE AND OXYPROPYLENE AND AT LEAST 1200 WHERE THE OXYALKYLENE GROUPS ARE SOLELY OXYPROPYLENE GROUPS.
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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |