US2948757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trihydroxy polyoxyalkylene ethers of glycerol
Assignee: Dow Chemical Co
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Filing: 1953-12-07
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Granted: 1960-08-09
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Expires: 1973-12-07
Abstract
No abstract record available.
Inventors
- 👤 Malcolm E Pruitt
- 👤 Jr William A Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:20
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A COMPOSITION HAVING EXCEPTIONAL ANTIFOAM PROPERTIES AND CONSISTING ESSENTIALLY OF A MIXTURE OF TRIHYDROXY POLYOXYALKYLENE ETHERS OF GLYCEROL IN WHICH THE POLYOXYALKYLENE ETHER CHAINS CONSIST OF A POLYOXY-1,2-PROPYLENE PORTION ADJACENT TO THE GLYCEROL NUCLEUS AND A POLYOXYETHYLENE PORTION REMOTE THEREFROM, THERE BEING AN AVERAGE OF AT LEAST 54 OXYALKYLENE GROUPS PER GLYCEROL NUCLEUS OF WHICH THERE ARE AN AVERAGE OF AT LEAST 48 OCY-1,2-PROPYLENE GROUPS PRESENT CONSTITUTING GREATER THAN 66 MOLE PERCENT OF THE TOTAL OXYALKYLENE GROUPS.
Claim 2
Dependent Claim
77 words
A COMPOSITION HAVING EXCEPTIONAL ANTIFOAM PROPERTIES AND CONSISTING ESSENTIALLY OF A MIXTURE OF TRIHYDROXY POLYOXYALKYLENE ETHERS OF GLYCEROL IN WHICH THE POLYOXYALKYLENE ETHER CHAINS CONSIST OF A POLYOXY-1,2-PROPYLENE PORTION ADJACENT TO THE GLYCEROL NUCLEUS AND A POLYOXYETHYLENE PORTION REMOTE THEREFROM, THERE BEING AN AVERAGE OF AT LEAST 54 OXYALKYLENE GROUPS PER GLYCEROL NUCLEUS OF WHICH THERE ARE AN AVERAGE OF AT LEAST 48 OCY-1,2-PROPYLENE GROUPS PRESENT CONSTITUTING GREATER THAN 66 MOLE PERCENT OF THE TOTAL OXYALKYLENE GROUPS.
References Cited (Backward Citations)
US2448664A
Cited
US2674619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |