US2748176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of dichloroethane
Assignee: Monsanto Chemicals Ltd
•
Filing: 1952-08-23
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Granted: 1956-05-29
•
Expires: 1972-08-23
Abstract
No abstract record available.
Inventors
- 👤 Herbert E Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:12
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/395
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN A PROCESS FOR THE PURIFICATION OF DICHLOROETHANE CONTAINING CHLOROPRENE AS AN IMPURITY, THE STEP WHICH COMPRISES SUBJECTING SAID DICHLORETHANE TO CHLORINATION BY BUBBLING CHLORINE GAS THERETHROUGH, AT A TEMPERATURE BELOW 50* C., WHEREBY THE CHLOROPRENE PRESENT IS SELECTIVELY CHLORINATED TO HIGHER CHLORINATED COMPOUNDS AND SEPARATING DICHLORETHANE THEREFROM BY FRACTIONAL DISTILLATION.
Claim 2
Dependent Claim
51 words
IN A PROCESS FOR THE PURIFICATION OF DICHLOROETHANE CONTAINING CHLOROPRENE AS AN IMPURITY, THE STEP WHICH COMPRISES SUBJECTING SAID DICHLORETHANE TO CHLORINATION BY BUBBLING CHLORINE GAS THERETHROUGH, AT A TEMPERATURE BELOW 50* C., WHEREBY THE CHLOROPRENE PRESENT IS SELECTIVELY CHLORINATED TO HIGHER CHLORINATED COMPOUNDS AND SEPARATING DICHLORETHANE THEREFROM BY FRACTIONAL DISTILLATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |