US2794334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propane recovery
Assignee: CF Braun and Co
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Filing: 1953-10-09
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Granted: 1957-06-04
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Expires: 1973-10-09
Abstract
No abstract record available.
Inventors
- 👤 Robert V Peaslee
- 👤 John F Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:52
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE PROCESS OF SEPARATING A HYDROCARBON GAS MIXTURE INTO A LIQUID FRACTION AND A GASEOUS FRACTION WHICH COMPRISES INTRODUCING THE GAS MIXTURE INTO A REGION OF A SEPARATING COLUMN SPACED FROM THE ENDS OF THE COLUMN, REMOVING GASEOUS HYDROCARBONS FROM THE TOP OF THE COLUMN, REMOVING LIQUEFIED HYDROCARBONS FROM THE BOTTOM OF THE COLUMN, INTRODUCING A REFRIGERANT INTO AN UPPER PART OF THE COLUMN AND AT A TEMPERATURE BELOW THAT OF THE LIQUID AND GASEOUS HYDROCARBONS LEAVING THE COLUMN, REFRIGERANT COPMPRISING A SOLUTION OF METHYL ALCOHOL AND WATER IN WHICH THE ALCOHOL IS PRESENT IN FROM ABOUT 60% TO ABOUT 90% BY VOLUME, THE REFRIGERANT BEING ADDED IN SUFFICIENT VOLUME TO LIQUEFY SAID LIQUID
Claim 2
Dependent Claim
114 words
THE PROCESS OF SEPARATING A HYDROCARBON GAS MIXTURE INTO A LIQUID FRACTION AND A GASEOUS FRACTION WHICH COMPRISES INTRODUCING THE GAS MIXTURE INTO A REGION OF A SEPARATING COLUMN SPACED FROM THE ENDS OF THE COLUMN, REMOVING GASEOUS HYDROCARBONS FROM THE TOP OF THE COLUMN, REMOVING LIQUEFIED HYDROCARBONS FROM THE BOTTOM OF THE COLUMN, INTRODUCING A REFRIGERANT INTO AN UPPER PART OF THE COLUMN AND AT A TEMPERATURE BELOW THAT OF THE LIQUID AND GASEOUS HYDROCARBONS LEAVING THE COLUMN, REFRIGERANT COPMPRISING A SOLUTION OF METHYL ALCOHOL AND WATER IN WHICH THE ALCOHOL IS PRESENT IN FROM ABOUT 60% TO ABOUT 90% BY VOLUME, THE REFRIGERANT BEING ADDED IN SUFFICIENT VOLUME TO LIQUEFY SAID LIQUID
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) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |