US2950310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface active substances
Assignee: Visco Products Co
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Filing: 1957-08-08
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Granted: 1960-08-23
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Expires: 1977-08-08
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A MONOMERIC ACIDIC ESTER OF AN ORGANIC DICARBOXY ACID AND A POLYOXYALKYLENE COMPOND HAVING A TERMINAL HYDROXY GROUP IN WHICH THE MAJOR PROPORTION OF THE MOLECULAR WEIGHT OF SAID POLYOXYALKYLENE COMPOUND CONSISTS OF OXYETHYLENE AND OXYPROPYLENE GROUPS, THE WEIGHT RATIO OF OXYETHYLENE TO OXYPROPYLENE NOT EXCEEDING 4:1, AND THE MINIMUM MOLECULAR WEIGHT ATTRIBUTABLE TO BOTH OXYETHYLENE AND OXYPROPYLENE GROUPS BEING AT LEAST 1000, WITH THE FURTHER PROVISO THAT THERE IS ONLY ONE POLYOXYALKYLENE CHAIN COMPOSED OF OXYETHYLENE AND OXYPROPYLENE GROUPS AND THE MAJOR PART OF THE MOLECULAR WEIGHT OF THE RESULTANT ESTER IS ATTRIBUTABLE TO OXYETHYLENE GROUPS AND OXYPROPYLENE GROUPS, THE MOLECULAR WEIGHT OF SAID ESTER BEING WITHIN THE RANGE FROM 1500 TO 7500.
Claim 2
Dependent Claim
114 words
A MONOMERIC ACIDIC ESTER OF AN ORGANIC DICARBOXY ACID AND A POLYOXYALKYLENE COMPOND HAVING A TERMINAL HYDROXY GROUP IN WHICH THE MAJOR PROPORTION OF THE MOLECULAR WEIGHT OF SAID POLYOXYALKYLENE COMPOUND CONSISTS OF OXYETHYLENE AND OXYPROPYLENE GROUPS, THE WEIGHT RATIO OF OXYETHYLENE TO OXYPROPYLENE NOT EXCEEDING 4:1, AND THE MINIMUM MOLECULAR WEIGHT ATTRIBUTABLE TO BOTH OXYETHYLENE AND OXYPROPYLENE GROUPS BEING AT LEAST 1000, WITH THE FURTHER PROVISO THAT THERE IS ONLY ONE POLYOXYALKYLENE CHAIN COMPOSED OF OXYETHYLENE AND OXYPROPYLENE GROUPS AND THE MAJOR PART OF THE MOLECULAR WEIGHT OF THE RESULTANT ESTER IS ATTRIBUTABLE TO OXYETHYLENE GROUPS AND OXYPROPYLENE GROUPS, THE MOLECULAR WEIGHT OF SAID ESTER BEING WITHIN THE RANGE FROM 1500 TO 7500.
References Cited (Backward Citations)
US2562878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |