Patent US2875255A successfully refreshed from Google Patents.
US2875255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic dehydrochlorination of 1, 2-dichloroethane
Assignee: Bridgestone Firestone Inc
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Filing: 1956-11-21
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Granted: 1959-02-24
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Expires: 1976-11-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Eberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:06
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR PRODUCTION OF VINYL CHLORIDE BY CATALYTIC DEHYDROHALOGENATION OF 1,2-DICHLOROETHANE WHICH COMPRISES, CONTACTING 1,2 DICHLOROETHANE WITH A METAL CHLORIDE CATALYST IN A REACTION ZONE MAINTAINED AT A TEMPERATURE OF BETWEEN ABOUT 300* AND ABOUT 550* C. SAID CATALYST BEING SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES OF THE ALKALI METALS, ZINE, STRONTIUM, CADMIUM AND NICKEL, THE RESIDENCE TIME OF THE REACTION GAS IN THE PRESENCE OF THE CATALYST BEING SUFFICIENT TO EFFECT AT LEAST A 50% CONVERSION OF THE 1,2-DICHLOROETHANE.
Claim 2
Dependent Claim
83 words
A PROCESS FOR PRODUCTION OF VINYL CHLORIDE BY CATALYTIC DEHYDROHALOGENATION OF 1,2-DICHLOROETHANE WHICH COMPRISES, CONTACTING 1,2 DICHLOROETHANE WITH A METAL CHLORIDE CATALYST IN A REACTION ZONE MAINTAINED AT A TEMPERATURE OF BETWEEN ABOUT 300* AND ABOUT 550* C. SAID CATALYST BEING SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES OF THE ALKALI METALS, ZINE, STRONTIUM, CADMIUM AND NICKEL, THE RESIDENCE TIME OF THE REACTION GAS IN THE PRESENCE OF THE CATALYST BEING SUFFICIENT TO EFFECT AT LEAST A 50% CONVERSION OF THE 1,2-DICHLOROETHANE.
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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |