US2458266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making ethylene oxide
Assignee: Monsanto Chemicals Ltd
•
Filing: 1945-02-09
•
Granted: 1949-01-04
•
Expires: 1965-02-09
Abstract
No abstract record available.
Inventors
- 👤 Rudolph L Heider
- 👤 Carlyle J Stehman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2238474A
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US2279469A
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US2294383A
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US1933091A
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US2125333A
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US2209908A
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US2194602A
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US2300106A
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US2343731A
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US2337421A
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GB558776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |