Patent US2679516A successfully refreshed from Google Patents.
US2679516A
Expired / Lapsed
US
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Esters of oxypropylated polypentaerythritols
Assignee: Baker Petrolite LLC
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Filing: 1951-05-14
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Granted: 1954-05-25
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Expires: 1971-05-14
Abstract
No abstract record available.
Inventors
- 👤 Groote Melvin De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:27
CPC Classifications
C; C10; C10M; C10M3/00; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/107; C10M2209/109
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN ESTER OF A POLYCARBOXY ACID AND AN OXYPROPYLATED POLYPENTAERYTHRITOL IN WHICH THE RATIO OF POLYCARBOXY ACID TO OXYPROPYLATED POLYPENTAERYTHRITOL IS ONE MOLE OF THE ACID FOR EACH AVAILABLE HYDROXYL RADICAL OF THE OXYPROPYLATED POLYPENTAERYTHRITOL AND IN WHICH THE OXYPROPYLATED POLYPENTAERYTHRITOL HAS A MOLECULAR WEIGHT BETWEEN 5.000 AND 65,000 AND THE POLYPENTAERYTHRITOL REPRESENTS NOT MORE THAN 7% BY WEIGHT OF THE OXYPROPYLATED POLYPENTAERYTHRITOL ON A STATISTICAL BASIS AND THE ASSUMTPITON OF COMPLETE REACTION INVOLYING THE PROPYLENE OXIDE AND THE POLYPENTAERYTHRITOL AND IN WHICH THE POLYCARBOXY ACID IS SELECTED FROM THE GROUP CONSISTING OF ACYCLIC AND ISOCYCLIC POLYCARBOXY ACIDS HAVING NOT MORE THAN 3 CARBOXY GROUPS NOR MORE THAN 8 CARBON ATOMS AND COMPOSE OF CARBON, HYDROGEN AND OXYGEN.
Claim 2
Dependent Claim
118 words
AN ESTER OF A POLYCARBOXY ACID AND AN OXYPROPYLATED POLYPENTAERYTHRITOL IN WHICH THE RATIO OF POLYCARBOXY ACID TO OXYPROPYLATED POLYPENTAERYTHRITOL IS ONE MOLE OF THE ACID FOR EACH AVAILABLE HYDROXYL RADICAL OF THE OXYPROPYLATED POLYPENTAERYTHRITOL AND IN WHICH THE OXYPROPYLATED POLYPENTAERYTHRITOL HAS A MOLECULAR WEIGHT BETWEEN 5.000 AND 65,000 AND THE POLYPENTAERYTHRITOL REPRESENTS NOT MORE THAN 7% BY WEIGHT OF THE OXYPROPYLATED POLYPENTAERYTHRITOL ON A STATISTICAL BASIS AND THE ASSUMTPITON OF COMPLETE REACTION INVOLYING THE PROPYLENE OXIDE AND THE POLYPENTAERYTHRITOL AND IN WHICH THE POLYCARBOXY ACID IS SELECTED FROM THE GROUP CONSISTING OF ACYCLIC AND ISOCYCLIC POLYCARBOXY ACIDS HAVING NOT MORE THAN 3 CARBOXY GROUPS NOR MORE THAN 8 CARBON ATOMS AND COMPOSE OF CARBON, HYDROGEN AND OXYGEN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |