US2676997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrochlorination of chloroethanes
Assignee: Dow Chemical Co
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Filing: 1948-09-15
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Granted: 1954-04-27
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Expires: 1968-09-15
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Brown
- 👤 Winston E Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:00
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS FOR MAKING A CHLOROETHYLENE WHICH COMPRISES PASSING A STREAM OF A MIXTURE OF A VAPORIZED MONOMETHYLPOLYCHLOROMETHANE AND FROM 0.1 TO 5 MOL PER CENT THEREOF CHLORINE OVER METALLIC IRON IN A HEATED ZONE MAINTAINED AT A TEMPERATURE OF 150* TO 500* C.
Claim 2
Dependent Claim
44 words
A PROCESS FOR MAKING A CHLOROETHYLENE WHICH COMPRISES PASSING A STREAM OF A MIXTURE OF A VAPORIZED MONOMETHYLPOLYCHLOROMETHANE AND FROM 0.1 TO 5 MOL PER CENT THEREOF CHLORINE OVER METALLIC IRON IN A HEATED ZONE MAINTAINED AT A TEMPERATURE OF 150* TO 500* C.
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) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |