US2730870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for pumping volatile liquids
Assignee: Air Products Inc
•
Filing: 1950-06-15
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Granted: 1956-01-17
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Expires: 1970-06-15
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:41
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04006; F25J3/04078; F25J3/0409; F25J3/04406; F25J3/04412; F25J2200/00; F25J2200/50; F25J2200/52; F25J2240/00; F25J2240/60; Y; Y10; Y10S; Y10S203/00; Y10S203/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE METHOD OF TRANSFERRING A STREAM OF LIQUID MATERIAL FROM A FRACTIONATING OPERATION IN WHICH OPERATION A COMPRESSED AND COOLED GASEOUS MIXTURE IS FRACTIONATED PRODUCING THE LIQUID MATERIAL AS A PRODUCT, COMPRISING WITHDRAWING A STREAM OF THE LIQUID MATERIAL FROM THE FRACTIONATING OPERATION, PASSING THE STREAM OF LIQUID MATERIAL TO AN EJECTOR, PUMPING THE STREAM OF LIQUID MATERIAL ISSUING FROM THE EJECTOR TO THE DESIRED PRESSURE, DIVERTING A PORTION OF THE PUMPED STREAM, EFFECTING A HEAT EXCHANGE BETWEEN THE DIVERTED STREAM AND A STREAM OF COLDER FLUID PRODUCED DURING THE FRACTIONATING OPERATION TO FORM A SUBCOOLED DIVERTED STREAM, AND PASSING THE SUBCOOLED DIVERTED STREAM TO THE NOZZLE OF THE EJECTOR AS THE PROPELLENT STREAM THEREFOR.
Claim 2
Independent Claim
115 words
THE METHOD OF TRANSFERRING A STREAM OF LIQUID MATERIAL FROM A FRACTIONATING OPERATION IN WHICH OPERATION A COMPRESSED AND COOLED GASEOUS MIXTURE IS FRACTIONATED PRODUCING THE LIQUID MATERIAL AS A PRODUCT, COMPRISING WITHDRAWING A STREAM OF THE LIQUID MATERIAL FROM THE FRACTIONATING OPERATION, PASSING THE STREAM OF LIQUID MATERIAL TO AN EJECTOR, PUMPING THE STREAM OF LIQUID MATERIAL ISSUING FROM THE EJECTOR TO THE DESIRED PRESSURE, DIVERTING A PORTION OF THE PUMPED STREAM, EFFECTING A HEAT EXCHANGE BETWEEN THE DIVERTED STREAM AND A STREAM OF COLDER FLUID PRODUCED DURING THE FRACTIONATING OPERATION TO FORM A SUBCOOLED DIVERTED STREAM, AND PASSING THE SUBCOOLED DIVERTED STREAM TO THE NOZZLE OF THE EJECTOR AS THE PROPELLENT STREAM THEREFOR.
References Cited (Backward Citations)
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Cited
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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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |