US2593451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrochlorination of polychloroethanes
Assignee: Dow Chemical Co
•
Filing: 1947-06-25
•
Granted: 1952-04-22
•
Expires: 1967-06-25
Abstract
No abstract record available.
Inventors
- 👤 Howard W Hill
- 👤 Eldred L Dance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:35
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A METHOD OF DEHYDROCHLORINATING A POLYCHLORINATED ETHANE COMPOUND OF THE CLASS CONSISTING OF 1,1,1-TRICHLOROETHANE AND 1,1,1,2-TETRACHLOROETHANE, WHICH COMPRISES HEATING THE COMPOUND IN LIQUID PHASE IN THE PRESENCE OF A CATALYTIC AMOUNT OF ANHYDROUS FERRIC CHLORIDE AT A TEMERPATURE SUFFICIENT TO VAPORIZE THE DEHYDROCHLORINATED COMPOUNDS AS IT IS FORMED.
Claim 2
Independent Claim
48 words
A METHOD OF DEHYDROCHLORINATING A POLYCHLORINATED ETHANE COMPOUND OF THE CLASS CONSISTING OF 1,1,1-TRICHLOROETHANE AND 1,1,1,2-TETRACHLOROETHANE, WHICH COMPRISES HEATING THE COMPOUND IN LIQUID PHASE IN THE PRESENCE OF A CATALYTIC AMOUNT OF ANHYDROUS FERRIC CHLORIDE AT A TEMERPATURE SUFFICIENT TO VAPORIZE THE DEHYDROCHLORINATED COMPOUNDS AS IT IS FORMED.
References Cited (Backward Citations)
US1198944A
Cited
US1419969A
Cited
GB436133A
Cited
US2084937A
Cited
US2134102A
Cited
US2467123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |