Patent US2903465A successfully refreshed from Google Patents.
US2903465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxidation
Assignee: —
•
Filing: —
•
Granted: 1959-09-08
•
Expires: 1976-09-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:18
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/38; C07D303/40; C07D303/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
IN THE IN-SITU PROCESS OF EPOXIDIZING AN OLEFINIC COMPOUND BY REACTION OF SAID OLEFINIC COMPOUND WITH AN AQUEOUS CARBOXYLIC PERACID FORMED IN SITU BY THE REACTION OF HYDROGEN PEROXIDE AND THE CORRESPONDING CARBOXYLIC ACID THE IMPROVEMENT WHICH COMPRISES REMOVING WATER FROM THE REACTION MIXTURE BY AZEOTROPIC DISTILLATION WITH AN INERT ENTRAINER DURING SAID EPOXIDATION REACTION.
References Cited (Backward Citations)
US2801253A
Cited
US2810732A
Cited
US2458484A
Cited
US2485160A
Cited
US2692271A
Cited
US2774774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |