Patent US2548498A successfully refreshed from Google Patents.
US2548498A
Expired / Lapsed
US
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Production of dry ice from natural gas
Assignee: Standard Oil Development Co
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Filing: 1948-02-17
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Granted: 1951-04-10
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Expires: 1968-02-17
Abstract
No abstract record available.
Inventors
- 👤 Robert P Russell
- 👤 Walter H Rupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:53
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04521; F25J3/04527; F25J3/04533; C; C01; C01B; C01B32/00; C01B32/50; C01B32/55; F25J3/0204; F25J3/0209; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0242; F25J3/0266; F25J2210/00; F25J2210/06; F25J2210/70; F25J2215/00; F25J2215/62; F25J2220/00; F25J2220/60; F25J2220/66; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151; Y10; Y10S; Y10S62/00; Y10S62/928; Y10S62/929
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE PROCESS OF PRODUCING DRY ICE FROM PETROLEUM AND NATURAL GAS WELL FLUIDS, WHICH COMPRISES SEPARATING SAID FLUIDS INTO AT LEAST A C1 AND C2 FRACTION, BURNING SAID C1 FRACTION, USING OXYGEN OF AT LEAST 95% PURITY TO PRODUCE CARBON DIOXIDE, LIQUEFYING SAID CARBON DIOXIDE, PURIFYING THE SAID C2 FRACTION, CONTACTING THE C2 FRACTION IN LIQUID PHASE WITH THE LIQUEFIED CARBON DIOXIDE FRACTION, AT A PRESSURE OF ABOUT 300 TO 1100 POUNDS PER SQUARE INCH WITHDRAWING LIQUID CARBON DIOXIDE AFTER SAID CONTACT, AND SHARPLY DROPPING THE PRESSURE UNDER WHICH THE LIQUID CARBON DIOXIDE IS MAINTAINED, WHEREBY EVAPORATION AND COOLING OF THE CARBON DIOXIDE OCCURS WITH CONSEQUENT FORMATION OF CARBON DIOXIDE SNOW, AND COMPRESSING SAID CARBON DIOXIDE SNOW.
Claim 2
Dependent Claim
117 words
THE PROCESS OF PRODUCING DRY ICE FROM PETROLEUM AND NATURAL GAS WELL FLUIDS, WHICH COMPRISES SEPARATING SAID FLUIDS INTO AT LEAST A C1 AND C2 FRACTION, BURNING SAID C1 FRACTION, USING OXYGEN OF AT LEAST 95% PURITY TO PRODUCE CARBON DIOXIDE, LIQUEFYING SAID CARBON DIOXIDE, PURIFYING THE SAID C2 FRACTION, CONTACTING THE C2 FRACTION IN LIQUID PHASE WITH THE LIQUEFIED CARBON DIOXIDE FRACTION, AT A PRESSURE OF ABOUT 300 TO 1100 POUNDS PER SQUARE INCH WITHDRAWING LIQUID CARBON DIOXIDE AFTER SAID CONTACT, AND SHARPLY DROPPING THE PRESSURE UNDER WHICH THE LIQUID CARBON DIOXIDE IS MAINTAINED, WHEREBY EVAPORATION AND COOLING OF THE CARBON DIOXIDE OCCURS WITH CONSEQUENT FORMATION OF CARBON DIOXIDE SNOW, AND COMPRESSING SAID CARBON DIOXIDE SNOW.
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) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |