Patent US3232029A successfully refreshed from Google Patents.
US3232029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of organic solvents from gaseous media
Assignee: Celanese Corp
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Filing: 1960-10-14
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Granted: 1966-02-01
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Expires: 1980-10-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Wallace R Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:01
CPC Classifications
B; B01; B01D; B01D5/00; B01D5/0027; B01D5/0003; B01D5/0006; C; C07; C07C; C07C17/00; C07C17/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A CONTINUOUS PROCESS FOR THE RECOVERY OF A VAPORIZED ORGANIC SOLVENT COMPRISING METHYLENE CHLORIDE FROM A GASEOUS MEDIUM WHICH COMPRISES CONTINUOUSLY REFRIGERATING A LIQUID COOLANT COMPRISING SAID SOLVENT IN THE LIQUID STATE, CONTINUOUSLY BRINGING SAID COOLANT INTO DIRECT CONTACT WITH SAID GASEOUS MEDIUM TO CONDENSE AND ENTRAIN SAID VAPORIZED SOLVENT AND TO HEAT SAID COOLANT, CONTINUOUSLY BRINGING SAID CONDENSED SOLVENT-CONTAINING COOLANT INTO HEAT TRANSFERRING RELATIONSHIP WITH SAID GASEOUS MEDIUM PRIOR TO SAID DIRECT CONTACT TO EFFECT A PRELIMINARY COOLING OF SAID MEDIUM, THEN CONTINUOUSLY BRINGING SAID CONDENSED SOLVENT-CONTAINING COOLANT INTO HEAT TRANSFERRING RELATIONSHIP WITH SAID GASEOUS MEDIUM SUBSEQUENT TO THE CONDENSATION OF THE VAPORIZED SOLVENT FROM SAID GASEOUS MEDIUM TO HEAT SAID GASEOUS MEDIUM AND COOL SAID COOLANT AND CONTINUOUSLY REREFRIGERATING SAID COOLANT.
Claim 2
Dependent Claim
123 words
A CONTINUOUS PROCESS FOR THE RECOVERY OF A VAPORIZED ORGANIC SOLVENT COMPRISING METHYLENE CHLORIDE FROM A GASEOUS MEDIUM WHICH COMPRISES CONTINUOUSLY REFRIGERATING A LIQUID COOLANT COMPRISING SAID SOLVENT IN THE LIQUID STATE, CONTINUOUSLY BRINGING SAID COOLANT INTO DIRECT CONTACT WITH SAID GASEOUS MEDIUM TO CONDENSE AND ENTRAIN SAID VAPORIZED SOLVENT AND TO HEAT SAID COOLANT, CONTINUOUSLY BRINGING SAID CONDENSED SOLVENT-CONTAINING COOLANT INTO HEAT TRANSFERRING RELATIONSHIP WITH SAID GASEOUS MEDIUM PRIOR TO SAID DIRECT CONTACT TO EFFECT A PRELIMINARY COOLING OF SAID MEDIUM, THEN CONTINUOUSLY BRINGING SAID CONDENSED SOLVENT-CONTAINING COOLANT INTO HEAT TRANSFERRING RELATIONSHIP WITH SAID GASEOUS MEDIUM SUBSEQUENT TO THE CONDENSATION OF THE VAPORIZED SOLVENT FROM SAID GASEOUS MEDIUM TO HEAT SAID GASEOUS MEDIUM AND COOL SAID COOLANT AND CONTINUOUSLY REREFRIGERATING SAID COOLANT.
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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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |