US2923686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glycol antifreeze mixtures
Assignee: Dow Chemical Co
•
Filing: 1955-05-23
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Granted: 1960-02-02
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Expires: 1975-05-23
Abstract
No abstract record available.
Inventors
- 👤 Edward O Ohlmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:18
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
AN ANTI-FREEZE CONCENTRATE CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF A MONOGLYCOL FROM THE CLASS CONSISTING OF ETHYLENE GLYCOL AND PROPYLENE GLYCOL TOGETHER WITH FROM .001 TO 10 PERCENT BY WEIGHT OF A FOAM SUPPRESSING PRODUCT CONSISTING OF A MIXTURE OF TRI(HYDROXYPOLYOXYALKYLENE) ETHERS OF GLYCEROL IN WHICH THE POLYOXYALKYLENE ETHER CHAINS CONSIST OF A POLYOXY-1,2-PROPYLENE PORTION ADJACENT TO THE GLYCEROL NUCELUS AND A POLYOXYETHYLENE PORTION REMOTE THEREFROM, THERE BEING AN AVERAGE OF FROM 54 TO ABOUT 195 OXYALKYLENE GROUPS PER GLYCEROL NUCELUS OF WHICH THERE ARE AN AVERAGE OF AT LEAST 48 OXY-1,2-PROPYLENE GROUPS PRESENT CONSTITUTING 66 TO 89 MOLE PERCENT OF THE TOTAL OXYALYLENE GROUPS.
Claim 2
Dependent Claim
106 words
AN ANTI-FREEZE CONCENTRATE CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF A MONOGLYCOL FROM THE CLASS CONSISTING OF ETHYLENE GLYCOL AND PROPYLENE GLYCOL TOGETHER WITH FROM .001 TO 10 PERCENT BY WEIGHT OF A FOAM SUPPRESSING PRODUCT CONSISTING OF A MIXTURE OF TRI(HYDROXYPOLYOXYALKYLENE) ETHERS OF GLYCEROL IN WHICH THE POLYOXYALKYLENE ETHER CHAINS CONSIST OF A POLYOXY-1,2-PROPYLENE PORTION ADJACENT TO THE GLYCEROL NUCELUS AND A POLYOXYETHYLENE PORTION REMOTE THEREFROM, THERE BEING AN AVERAGE OF FROM 54 TO ABOUT 195 OXYALKYLENE GROUPS PER GLYCEROL NUCELUS OF WHICH THERE ARE AN AVERAGE OF AT LEAST 48 OXY-1,2-PROPYLENE GROUPS PRESENT CONSTITUTING 66 TO 89 MOLE PERCENT OF THE TOTAL OXYALYLENE GROUPS.
References Cited (Backward Citations)
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US2757142A
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US2657181A
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US2665312A
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US2674619A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |