Patent US2950299A successfully refreshed from Google Patents.
US2950299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface active substances of ether ester class
Assignee: Visco Products Co
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Filing: 1958-01-06
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Granted: 1960-08-23
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Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:11
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04; C11; C11C; C11C3/00; C11C3/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A MONOMERIC ACIDIC ESTER OF A DIMERIZED HIGHER FATTY ACID CONTAINING FROM 34 TO 36 CARBON ATOMS AND A POLYOXYALKYLENE COMPOUND 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 ABOUT 4:1, THE WEIGHT PERCENTAGE OF OXYETHYLENE IN SAID ESTER BEING AT LEAST 8% BY WEIGHT OF THE TOTAL WEIGHT OF OXYETHYLENE AND OXYPROPYLENE, THE MINIMUM MOLECULAR WEIGHT ATTRIBUTABLE TO BOTH OXYETHYLENE AND OXYPROPYLENE GROUPS BEING AT LEAST ABOUT 1,000, AND THE MAXIMUM MOLECULAR WEIGHT ATTRIBUTABLE TO BOTH OXYETHYLENE AND OXYPROPYLENE GROUPS BEING 7500, THE MOLAR RATIO OF THE SAID ACID TO SAID POLYOXYALKYLENE COMPOUND IS NOT LESS THAN ABOUT 1:1 NOR MORE THAN ABOUT 2:1.
Claim 2
Dependent Claim
130 words
A MONOMERIC ACIDIC ESTER OF A DIMERIZED HIGHER FATTY ACID CONTAINING FROM 34 TO 36 CARBON ATOMS AND A POLYOXYALKYLENE COMPOUND 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 ABOUT 4:1, THE WEIGHT PERCENTAGE OF OXYETHYLENE IN SAID ESTER BEING AT LEAST 8% BY WEIGHT OF THE TOTAL WEIGHT OF OXYETHYLENE AND OXYPROPYLENE, THE MINIMUM MOLECULAR WEIGHT ATTRIBUTABLE TO BOTH OXYETHYLENE AND OXYPROPYLENE GROUPS BEING AT LEAST ABOUT 1,000, AND THE MAXIMUM MOLECULAR WEIGHT ATTRIBUTABLE TO BOTH OXYETHYLENE AND OXYPROPYLENE GROUPS BEING 7500, THE MOLAR RATIO OF THE SAID ACID TO SAID POLYOXYALKYLENE COMPOUND IS NOT LESS THAN ABOUT 1:1 NOR MORE THAN ABOUT 2:1.
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) | 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 |