Patent US1425607A successfully refreshed from Google Patents.
Patent US2957924A successfully refreshed from Google Patents.
US2957924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxychlorinating of alkanes
Assignee: Columbia Southern Chemical Corp
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Filing: 1958-02-25
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Granted: 1960-10-25
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Expires: 1978-02-25
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Heiskell
- 👤 Dehn Frederick Chris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:06
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR THE CHLORINATION OF ALIPHATIC HYDROCARBONS CONTAINING FROM 1 TO 4 CARBON ATOMS AND THEIR INCOMPLETELY CHLORINATED DERIVATIVES IN THE GASEOUS PHASE COMPRISING CONTACTING THE MATERIAL TO BE CHLORINATED, AN OXYGEN CONTAINING GAS AND A CHLORINATING AGENT SELECTED FROM THE GROUP CONSISTING OF HCL, CL2 AND MIXTURES OF HC1 AND CL2 WITH A COPPER CHLORIDE CATALYST CONTAINED IN AN ELONGATED REACTOR HAVING A INNER AND AN OUTER WALL, CONTACTING SAID OUTER WALL WITH A HEAT EXCHANGE MEDIUM IN DIRECT HEAT EXCHANGE RELATIONSHIP THEREWITH AND MAINTAINING SAID MEDIUM AT A TEMPERATURE BETWEEN ABOUT 325* C. AND ABOUT 400* C.
Claim 2
Dependent Claim
100 words
A PROCESS FOR THE CHLORINATION OF ALIPHATIC HYDROCARBONS CONTAINING FROM 1 TO 4 CARBON ATOMS AND THEIR INCOMPLETELY CHLORINATED DERIVATIVES IN THE GASEOUS PHASE COMPRISING CONTACTING THE MATERIAL TO BE CHLORINATED, AN OXYGEN CONTAINING GAS AND A CHLORINATING AGENT SELECTED FROM THE GROUP CONSISTING OF HCL, CL2 AND MIXTURES OF HC1 AND CL2 WITH A COPPER CHLORIDE CATALYST CONTAINED IN AN ELONGATED REACTOR HAVING A INNER AND AN OUTER WALL, CONTACTING SAID OUTER WALL WITH A HEAT EXCHANGE MEDIUM IN DIRECT HEAT EXCHANGE RELATIONSHIP THEREWITH AND MAINTAINING SAID MEDIUM AT A TEMPERATURE BETWEEN ABOUT 325* C. AND ABOUT 400* 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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |