Patent US3201367A successfully refreshed from Google Patents.
US3201367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylene oxide polymers stabilized with urea compounds
Assignee: Union Carbide Corp
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Filing: 1960-10-12
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Granted: 1965-08-17
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Expires: 1980-10-12
Abstract
No abstract record available.
Inventors
- 👤 Keith L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/21; C08K5/36; C08K5/39; C08K5/405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A COMPOSITION COMPRISING AN ETHYLENE OXIDE POLYMER WHEREIN SAID POLYMER IS PREPARED BY THE SUSPENSION POLYMERIZATION OF ETHYLENE OXIDE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METAL AMIDES, ALKALINE EARTH METAL HEXAMMONIATES, AND ALKALINE EARTH METAL AMIDE-ALCOHOLATES, AND A STABILIZING AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA, ARYLUREA, ACYLUREA, N-ACYL-N''-ALKYLUREA, DICHLORALUREA, N,N''-DIARYLUREA, N,N-DIARYLUREA, THIOUREA, ALKENYLUREA, ALKYLTHIOUREA, ARYLTHIOUREA, ACYLTHIOUREA, N,N''-DIALKYLTHIOUREA, AND N,N''-DIARYLTHIOUREA.
Claim 2
Dependent Claim
72 words
A COMPOSITION COMPRISING AN ETHYLENE OXIDE POLYMER WHEREIN SAID POLYMER IS PREPARED BY THE SUSPENSION POLYMERIZATION OF ETHYLENE OXIDE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METAL AMIDES, ALKALINE EARTH METAL HEXAMMONIATES, AND ALKALINE EARTH METAL AMIDE-ALCOHOLATES, AND A STABILIZING AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA, ARYLUREA, ACYLUREA, N-ACYL-N''-ALKYLUREA, DICHLORALUREA, N,N''-DIARYLUREA, N,N-DIARYLUREA, THIOUREA, ALKENYLUREA, ALKYLTHIOUREA, ARYLTHIOUREA, ACYLTHIOUREA, N,N''-DIALKYLTHIOUREA, AND N,N''-DIARYLTHIOUREA.
References Cited (Backward Citations)
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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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |