Patent US2977370A successfully refreshed from Google Patents.
US2977370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 2-oxazolidones
Assignee: EIDP Inc
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Filing: 1959-04-13
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Granted: 1961-03-28
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Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Oken Aaron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:48
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/08; C07D263/16; C07D263/18; C07D263/20; C07D263/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PREPARING A 2-OXAZOLIDONE WHICH COMPRISES HEATING TO A TEMPERATURE OF FROM ABOUT 220*C. TO 250*C. A MIXTURE CONSISTING OF APPROXIMATELY STOICHIOMETRIC PROPORTIONS OF (A) AN EPOXIDE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE OXIDE, PROPYLENE OXIDE, 1.2EPOXYBUTANE, 1.2-EPOXYHEXANE, 1,2-EPOXYOCTANE, 1,2EPOXYHEXADECANE, 2,3-EPOXYBUTANE, 3,4-EPOXYHEXANE, 3CHLORO -1,2 - EPOXYPROPANE, 1,2-EPOXY-5-HEXANE, 1,2EPOXYCYCLOHEXANE, 1,2-EPOXY - 2 -CYCLOHEXYLETHANE, 1,2EPOXY - 2 - CYCLOHEXYLPROPANE AND 1,2-EPOXY-3-BUTENE, AND (B) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ORGANIC ISOCYANATE OF THE FORMULA R-NCO AND A 1,3-DIAZACYCLOBUTANE-2,4-DIONE OF THE FORMULA
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING A 2-OXAZOLIDONE WHICH COMPRISES HEATING TO A TEMPERATURE OF FROM ABOUT 220*C. TO 250*C. A MIXTURE CONSISTING OF APPROXIMATELY STOICHIOMETRIC PROPORTIONS OF (A) AN EPOXIDE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE OXIDE, PROPYLENE OXIDE, 1.2EPOXYBUTANE, 1.2-EPOXYHEXANE, 1,2-EPOXYOCTANE, 1,2EPOXYHEXADECANE, 2,3-EPOXYBUTANE, 3,4-EPOXYHEXANE, 3CHLORO -1,2 - EPOXYPROPANE, 1,2-EPOXY-5-HEXANE, 1,2EPOXYCYCLOHEXANE, 1,2-EPOXY - 2 -CYCLOHEXYLETHANE, 1,2EPOXY - 2 - CYCLOHEXYLPROPANE AND 1,2-EPOXY-3-BUTENE, AND (B) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ORGANIC ISOCYANATE OF THE FORMULA R-NCO AND A 1,3-DIAZACYCLOBUTANE-2,4-DIONE OF THE FORMULA
References Cited (Backward Citations)
FR870471A
Cited
US2602075A
Cited
US2594979A
Cited
US2799663A
Cited
US2788335A
Cited
US2865926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |