US2738658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of gas by solidification
Assignee: Airco Inc
•
Filing: 1952-12-24
•
Granted: 1956-03-20
•
Expires: 1972-12-24
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Brouson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:16
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/06; F25J3/0605; F25J3/062; C; C01; C01B; C01B32/00; C01B32/50; C01B32/55; F25J3/063; F25J3/067; F25J2205/00; F25J2205/20; F25J2205/24; F25J2210/00; F25J2210/20; F25J2215/00; F25J2215/04; F25J2220/00; F25J2220/80; F25J2220/82; F25J2270/00; F25J2270/40; F25J2270/42; F25J2280/00; F25J2280/30; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD FOR MAKING SOLID CARBON DIOXIDE FROM A GASEOUS MIXTURE CONTAINING CARBON DIOXIDE AND OTHER CONSTITUENTS WHICH ARE MORE VOLATILE THAN CARBON DIOXIDE COMPRISING FREEZING OUT THE CARBON DIOXIDE AS A SOLID FROM THE GASEOUS MIXTURE BY INDIRECT HEAT EXCHANGE WITH A LOW TEMPERATURE REFRIGERANT, LIQUEFYING THE SOLID CARBON DIOXIDE BY INCREASING THE PRESSURE AND TEMPERATURE THEREOF TO ABOVE TRIPLE POINT, TRANSFERRING LIQUEFIED CARBON DIOXIDE TO A SOLIDIFYING ZONE, DECREASING THE PRESSURE ON THE TRANSFERRED LIQUID CARBON DIOXIDE IN ORDER TO FORM SOLID CARBON DIOXIDE AND GASEOUS CARBON DIOXIDE, COMPRESSING THE GASEOUS CARBON DIOXIDE THUS FORMED, AND UTILIZING SUCH COMPRESSED CARBON DIOXIDE IN SAID LIQUEFYING STEP.
Claim 2
Independent Claim
107 words
A METHOD FOR MAKING SOLID CARBON DIOXIDE FROM A GASEOUS MIXTURE CONTAINING CARBON DIOXIDE AND OTHER CONSTITUENTS WHICH ARE MORE VOLATILE THAN CARBON DIOXIDE COMPRISING FREEZING OUT THE CARBON DIOXIDE AS A SOLID FROM THE GASEOUS MIXTURE BY INDIRECT HEAT EXCHANGE WITH A LOW TEMPERATURE REFRIGERANT, LIQUEFYING THE SOLID CARBON DIOXIDE BY INCREASING THE PRESSURE AND TEMPERATURE THEREOF TO ABOVE TRIPLE POINT, TRANSFERRING LIQUEFIED CARBON DIOXIDE TO A SOLIDIFYING ZONE, DECREASING THE PRESSURE ON THE TRANSFERRED LIQUID CARBON DIOXIDE IN ORDER TO FORM SOLID CARBON DIOXIDE AND GASEOUS CARBON DIOXIDE, COMPRESSING THE GASEOUS CARBON DIOXIDE THUS FORMED, AND UTILIZING SUCH COMPRESSED CARBON DIOXIDE IN SAID LIQUEFYING STEP.
References Cited (Backward Citations)
US1818816A
Cited
GB341361A
Cited
US1981676A
Cited
US1870691A
Cited
US1971106A
Cited
US1893852A
Cited
US1992486A
Cited
US2011551A
Cited
US2143283A
Cited
US2325045A
Cited
US2341698A
Cited
US2537044A
Cited
US2504051A
Cited
US2632316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |