US3236030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preferentially absorbing and recovering a fluorinated hydrocarbon
Assignee: Dow Chemical Co
•
Filing: 1965-05-03
•
Granted: 1966-02-22
•
Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Tress William R Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:53
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR SEPARATING FLUOROFORM AND TETRAFLUOROETHYLENE COMPONENTS FROM A MIXTURE OF GASES CONTAINING THESE MEMBERS WHICH COMPRISES; (A) PROVIDING A GASEOUS MIXTURE CONTAINING FLUOROFORM AND TETRAFLUOROETHYLENE, (B) CONTACTING SAID MIXTURE WITH AN ABSORBENT LIQUID SELECTED FROM THE GROUP CONSISTINNG OF HEXAMETHYLPHOSPHORIC TRIAMIDE, OCTAMETHYLPHOSPHORAMIDE, DIMETHYL FORMAMIDE AND DIMETHYL ETHER TETRAETHYLENE GLYCOL AND PREFERENETIALLY DISSOLVING SAID FLUOROFORM IN SAID ABSORBENT LIQUID, (C) SEPARATING THE RESULTANT LIQUID AND GASEOUS PHASE,
Claim 2
Dependent Claim
68 words
A PROCESS FOR SEPARATING FLUOROFORM AND TETRAFLUOROETHYLENE COMPONENTS FROM A MIXTURE OF GASES CONTAINING THESE MEMBERS WHICH COMPRISES; (A) PROVIDING A GASEOUS MIXTURE CONTAINING FLUOROFORM AND TETRAFLUOROETHYLENE, (B) CONTACTING SAID MIXTURE WITH AN ABSORBENT LIQUID SELECTED FROM THE GROUP CONSISTINNG OF HEXAMETHYLPHOSPHORIC TRIAMIDE, OCTAMETHYLPHOSPHORAMIDE, DIMETHYL FORMAMIDE AND DIMETHYL ETHER TETRAETHYLENE GLYCOL AND PREFERENETIALLY DISSOLVING SAID FLUOROFORM IN SAID ABSORBENT LIQUID, (C) SEPARATING THE RESULTANT LIQUID AND GASEOUS PHASE,
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |