US2556850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen separation
Assignee: Standard Oil Development Co
•
Filing: 1946-06-18
•
Granted: 1951-06-12
•
Expires: 1966-06-18
Abstract
No abstract record available.
Inventors
- 👤 Henry J Ogorzaly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
F; F25; F25J; F25J5/00; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04278; F25J3/04151; F25J2205/00; F25J2205/24; F25J2270/00; F25J2270/12; F25J2270/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A PROCESS FOR THE PRODUCTION OF OXYGEN AND NITROGEN FROM AIR BY LOW TEMPERATURE FRACTIONATION AND WHEREIN HEAT TRANSFER BETWEEN INLET AIR AND THE RETURNING PRODUCTS IS ACCOMPLISHED BY CAUSING SAID INLET AIR TO FLOW IN INDIRECT COUNTER-CURRENT HEAT EXCHANGE RELATIONSHIP WITH THE COLD OXYGEN AND NITROGEN PRODUCTS PROCEEDING FROM THE SAID LOW TEMPERATURE FRACTIONATION AND WHEREIN THE TRAVEL PATHS OF THE AIR ON THE ONE HAND AND THE OXYGEN AND NITROGEN ON THE OTHER ARE PERIODICALLY ALTERNATED FOR THE PURPOSE OF REVAPORIZATION BY THE OXYGEN AND NITROGEN OF ICE AND SOLID CARBON DIOXIDE DEPOSITED IN SAID TRAVEL PATHS BY THE SAID INLET AIR AND WHEREIN THE INDIRECT COUNTERCURRENT HEAT EXCHANGE FLOW IS CARRIED OUT IN A PLURALITY OF SEPARATE STAGES, THE IMPROVEMENT WHICH COMPRISES SUPPLYING AUXILIARY REFRIGERATION TO THE INLET AIR STREAM BETWEEN SAID
Claim 2
Dependent Claim
136 words
IN A PROCESS FOR THE PRODUCTION OF OXYGEN AND NITROGEN FROM AIR BY LOW TEMPERATURE FRACTIONATION AND WHEREIN HEAT TRANSFER BETWEEN INLET AIR AND THE RETURNING PRODUCTS IS ACCOMPLISHED BY CAUSING SAID INLET AIR TO FLOW IN INDIRECT COUNTER-CURRENT HEAT EXCHANGE RELATIONSHIP WITH THE COLD OXYGEN AND NITROGEN PRODUCTS PROCEEDING FROM THE SAID LOW TEMPERATURE FRACTIONATION AND WHEREIN THE TRAVEL PATHS OF THE AIR ON THE ONE HAND AND THE OXYGEN AND NITROGEN ON THE OTHER ARE PERIODICALLY ALTERNATED FOR THE PURPOSE OF REVAPORIZATION BY THE OXYGEN AND NITROGEN OF ICE AND SOLID CARBON DIOXIDE DEPOSITED IN SAID TRAVEL PATHS BY THE SAID INLET AIR AND WHEREIN THE INDIRECT COUNTERCURRENT HEAT EXCHANGE FLOW IS CARRIED OUT IN A PLURALITY OF SEPARATE STAGES, THE IMPROVEMENT WHICH COMPRISES SUPPLYING AUXILIARY REFRIGERATION TO THE INLET AIR STREAM BETWEEN SAID
References Cited (Backward Citations)
US1843043A
Cited
US1808494A
Cited
US2022165A
Cited
US2050511A
Cited
US2070099A
Cited
US2070098A
Cited
US2460859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |