US2733272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trihydroxy polyoxyalkylene ethers
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:48
CPC Classifications
C; C10; C10M; C10M145/00; C10M145/18; C10M145/24; C10M145/26; C10M145/34; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/107; C10N; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/08; C10N2040/46
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
A MIXTURE OF TRIHYDROXY MIXED POLY(OXYETHYLENEOXY-1, 2-PROPYLENE) ETHERS OF GLYCEROL IN WHICH THE OXYETHYLENE GROUPS REPRESENT FROM ABOUT 20 TO ABOUT 80 MOL PERCENT OF THE TOTAL OXYALKYLENE GROUPS, AND IN WHICH THERE IS AN AVERAGE OF AT LEAST 15 OXYALKYLENE GROUPS PER GLYCEROL NUCLEUS, SAID MIXTURE HAVING BEEN PREPARED BY REACTING A MIXTURE OF ETHYLENE OXIDE AND PROPYLENE OXIDE WITH GLYCEROL.
References Cited (Backward Citations)
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Cited
US2236919A
Cited
US2327053A
Cited
US2233382A
Cited
GB616256A
Cited
US2520733A
Cited
US2481278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |