Patent US3577471A successfully refreshed from Google Patents.
US3577471A
Expired / Lapsed
US
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Halogen interchange process
Assignee: Gulf Research and Development Co
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Filing: 1968-02-01
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Granted: 1971-05-04
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Expires: 1988-02-01
Abstract
Abstract HALIDES CAN BE MADE TO UNDERGO TRANSHALOGENATION IN A PROCESS WHEREIN TWO COMPOUNDS CONTAINING DIFFERENT HALOGEN SUBSTITUENTS ARE CONTACTED AT ELEVATED TEMPERATURES. BY THIS PROCESS, ORGANIC HALIDES, SUCH AS VINYL BROMIDE AND DIBROMOETHANE, CAN BE DIRECTLY CONVERTED TO VINYL CHLORIDE BY CONTACT WITH A SUITABLE HALIDE SUCH AS HYDROGEN CHLORIDE. ETHYLENE, WHICH IS EASILY BROMINATED, CAN THUS READILY BE CONVERTED TO VINYL CHLORIDE.
Inventors
- 👤 William L Walsh
- 👤 John G Mcnulty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:56
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |