Patent US3197941A successfully refreshed from Google Patents.
US3197941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process for the recovery of dichloroethane
Assignee: Halcon Research and Development Corp
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Filing: 1960-06-27
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Granted: 1965-08-03
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Expires: 1980-06-27
Abstract
No abstract record available.
Inventors
- 👤 Colton John White
- 👤 Sherwin Martin Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:07
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; Y; Y10; Y10S; Y10S62/00; Y10S62/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR RECOVERING 1,2-DICHLOROETHANE FROM A DILUTE MIXTURE OF 1,2-DICHLOROETHANE, INERT GAS AND HIGHER BOILING MATERIAL, SAID DILUTE MIXTURE BEING OBTAINED BY THE CHLORINATION OF EHTYLENE, WHICH COMPRISES: CONTACTING SAID MIXTURE WITH AN ADDITIONAL HIGHER BOILING MATERIAL SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS AND CHLOROHYDROCARBONS HAVING A BOILING POINT GREATER THAN 1,2-DICHLOROETHANE AND BEING FORMED IN SAID CHLORINATION AND COOLING SAID MIXTURE TO A TEMPERATURE BETWEEN -29* TO 15*C., SAID CONTACTING AND COOLING STEPS SERVING TO PARTIALLY CONDENSE SAID DILUTE MIXTURE; SEPARATING SAID CONDENSATE CONTAINING SAID HIGHER BOILING MATERIAL AND SAID 1,2-DICHLOROETHANE FROM THE NON-CONDENSED MATERIAL CONTAINING SAID INERT GAS; FRACTIONATING SAID CONDENSATE; RECOVERING SAID 1,2-DICHLOROETHANE AS A DISTILLATE AND RECYCLING THE BOTTOMS AS THE AFORESAID HIGHER BOILING MATERIAL TO SAID CONTACTING STEP.
Claim 2
Dependent Claim
125 words
A PROCESS FOR RECOVERING 1,2-DICHLOROETHANE FROM A DILUTE MIXTURE OF 1,2-DICHLOROETHANE, INERT GAS AND HIGHER BOILING MATERIAL, SAID DILUTE MIXTURE BEING OBTAINED BY THE CHLORINATION OF EHTYLENE, WHICH COMPRISES: CONTACTING SAID MIXTURE WITH AN ADDITIONAL HIGHER BOILING MATERIAL SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS AND CHLOROHYDROCARBONS HAVING A BOILING POINT GREATER THAN 1,2-DICHLOROETHANE AND BEING FORMED IN SAID CHLORINATION AND COOLING SAID MIXTURE TO A TEMPERATURE BETWEEN -29* TO 15*C., SAID CONTACTING AND COOLING STEPS SERVING TO PARTIALLY CONDENSE SAID DILUTE MIXTURE; SEPARATING SAID CONDENSATE CONTAINING SAID HIGHER BOILING MATERIAL AND SAID 1,2-DICHLOROETHANE FROM THE NON-CONDENSED MATERIAL CONTAINING SAID INERT GAS; FRACTIONATING SAID CONDENSATE; RECOVERING SAID 1,2-DICHLOROETHANE AS A DISTILLATE AND RECYCLING THE BOTTOMS AS THE AFORESAID HIGHER BOILING MATERIAL TO SAID CONTACTING STEP.
References Cited (Backward Citations)
US1804432A
Cited
US1841279A
Cited
US1950720A
Cited
US2099231A
Cited
US2321472A
Cited
US2393367A
Cited
US2658087A
Cited
US2658088A
Cited
GB713414A
Cited
US2875586A
Cited
US2816148A
Cited
US2990914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |