US2803679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrochlorination process
Assignee: Ethyl Corp
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Filing: 1955-04-05
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Granted: 1957-08-20
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Expires: 1975-04-05
Abstract
No abstract record available.
Inventors
- 👤 Conrad Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:54
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR THE MANUFACTURE OF CHLOROETHYLENES WHICH COMPRISES CONTACTING A POLYCHLOROETHANE OF THE CLASS CONSISTING OF 1,1-DICHLOROETHANE AND 1,1,1-TRICHLOROETHANE AT A TEMPERATURE BETWEEN ABOUT 150* AND 500* C. WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OFF METAL SALTS AND METAL OXIDES, SAID METAL BEING IN GROUP II OF THE PERIODIC TABLE.
Claim 2
Dependent Claim
53 words
A PROCESS FOR THE MANUFACTURE OF CHLOROETHYLENES WHICH COMPRISES CONTACTING A POLYCHLOROETHANE OF THE CLASS CONSISTING OF 1,1-DICHLOROETHANE AND 1,1,1-TRICHLOROETHANE AT A TEMPERATURE BETWEEN ABOUT 150* AND 500* C. WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OFF METAL SALTS AND METAL OXIDES, SAID METAL BEING IN GROUP II OF THE PERIODIC TABLE.
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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |