Patent US2801253A successfully refreshed from Google Patents.
US2801253A
Expired / Lapsed
US
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In situ epoxidation of organic esters
Assignee: —
•
Filing: —
•
Granted: 1957-07-30
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Expires: 1974-07-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/38; C07D303/40; C07D303/42; C07D301/00; C07D301/02; C07D301/03; C07D301/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1988448A
Cited
US2567930A
Cited
US2569502A
Cited
US2443280A
Cited
US2458484A
Cited
US2485160A
Cited
US2543419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |