Patent US2831034A successfully refreshed from Google Patents.
US2831034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyoxyalkylene glycol ethers of glycerine
Assignee: Dow Chemical Co
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Filing: 1953-12-07
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Granted: 1958-04-15
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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
2026-11-01 22:32
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/30; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A MIXTURE OF TRIHYDROXY POLYOXYALKYLENE ETHERS OF GLYCEROL WHEREIN THREE POLYOXY-1,2-PROPYLENE CHAINS ARE ATTACHED TO THE GLYCEROL NUCLEUS AND THREE HYDROXY POLYOXYETHYLENE CHAINS ARE IN TURN ATTACHED TO SAID POLYOXY1,2-PROPYLENE CHAINS, THE OXY-1,2-PROPYLENE GROUPS COMPRISING NO MORE THAN 66 MOLE PERCENT OF THE TOTAL OXYALKYLENE GROUPS, AND THE AVERAGE NUMBER OF OXY-1,2-PROPYLENE GROUPS PER GLYCEROL NUCLEUS IN SAID MIXTURE BEING AT LEAST 63 AND THAT OF THE OXYETHYLENE GROUPS BEING AT LEAST 33.
Claim 2
Dependent Claim
73 words
A MIXTURE OF TRIHYDROXY POLYOXYALKYLENE ETHERS OF GLYCEROL WHEREIN THREE POLYOXY-1,2-PROPYLENE CHAINS ARE ATTACHED TO THE GLYCEROL NUCLEUS AND THREE HYDROXY POLYOXYETHYLENE CHAINS ARE IN TURN ATTACHED TO SAID POLYOXY1,2-PROPYLENE CHAINS, THE OXY-1,2-PROPYLENE GROUPS COMPRISING NO MORE THAN 66 MOLE PERCENT OF THE TOTAL OXYALKYLENE GROUPS, AND THE AVERAGE NUMBER OF OXY-1,2-PROPYLENE GROUPS PER GLYCEROL NUCLEUS IN SAID MIXTURE BEING AT LEAST 63 AND THAT OF THE OXYETHYLENE GROUPS BEING AT LEAST 33.
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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |