Patent US2870225A successfully refreshed from Google Patents.
US2870225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 2-dichloroethane
Assignee: Celanese Corp
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Filing: 1954-12-29
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Granted: 1959-01-20
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Expires: 1974-12-29
Abstract
No abstract record available.
Inventors
- 👤 Stone D Cooley
- 👤 Frank B Marcotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:49
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/013; C07C17/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
PROCESS FOR THE CHLORINATION OF THE ETHYLENE IN A MIXTURE PRODUCED BY THE CRACKING OF AN ALKANE AND CONTAINING AT LEAST 12.5% BY VOLUME OF ETHYLENE, WHICH COMPRISES REACTING, IN THE VAPOR PHASE, SAID MIXTURE AT AN ELEVATED TEMPERATURE ABOVE 225* C. AND BELOW THE TEMPEATURE AT WHICH SUBSTANTIAL DEGRADATION OF THE REACTANTS OR PRODUCTS IS FAVORED WITH A MIXTURE OF CHLORINE AND OXYGEN IN THE PRESENCE OF A CATALYST FOR THE ADDITIVE CHLORINATION OF ETHYLENE COMPRISING ACTIVATED BAUXITE TO PRODUCE 1,2-DICHLOROETHANE, TEH AMOUNT OF OXYGEN IN THE REACTION MIXTURE BEING ABOVE 1% BY VOLUME.
Claim 2
Dependent Claim
95 words
PROCESS FOR THE CHLORINATION OF THE ETHYLENE IN A MIXTURE PRODUCED BY THE CRACKING OF AN ALKANE AND CONTAINING AT LEAST 12.5% BY VOLUME OF ETHYLENE, WHICH COMPRISES REACTING, IN THE VAPOR PHASE, SAID MIXTURE AT AN ELEVATED TEMPERATURE ABOVE 225* C. AND BELOW THE TEMPEATURE AT WHICH SUBSTANTIAL DEGRADATION OF THE REACTANTS OR PRODUCTS IS FAVORED WITH A MIXTURE OF CHLORINE AND OXYGEN IN THE PRESENCE OF A CATALYST FOR THE ADDITIVE CHLORINATION OF ETHYLENE COMPRISING ACTIVATED BAUXITE TO PRODUCE 1,2-DICHLOROETHANE, TEH AMOUNT OF OXYGEN IN THE REACTION MIXTURE BEING ABOVE 1% BY VOLUME.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |