US3197941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process for the recovery of dichloroethane
Assignee: Halcon Research and Development Corp
•
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 22:14
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.
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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 |