US3241327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste heat recovery in air fractionation
Assignee: La Fleur Corp
•
Filing: 1963-12-18
•
Granted: 1966-03-22
•
Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Fleur James K La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:08
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/044; F02; F02C; F02C1/00; F02C1/04; F02C1/10; F02C6/00; F02C6/04; F02C6/10; F22; F22B; F22B1/00; F22B1/02; F22B1/08; F25B; F25B27/00; F25B27/02; F25J3/04248; F25J3/04278; F25J3/04521; F25J3/04527; F25J3/04551; F25J3/04557; F25J3/04612; F25J3/04642; F25J3/04648; F25J3/04654; F25J3/0466; F25J2200/00; F25J2200/50; F25J2200/74; F25J2205/00; F25J2205/24; F25J2270/00; F25J2270/14; F25J2270/16; F25J2270/30; F25J2270/60; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02A30/274; Y10; Y10S; Y10S62/00; Y10S62/912; Y10S62/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR UTILIZING WASTE HEAT FROM A SYSTEM EMPLOYING OXYGEN FOR OPERATION WHICH COMPRISES OPERATWASTE PRODUCTS, PASSING SAID HOT GASEOUS WASTE PRODUCTS INTO HEAT EXCHANGE RELATION WITH A COMPRESSED GAS TO HEAT SAME, INTRODUCING SAID HOT COMPRESSED GAS INTO A PRIME MOVER FOR COMPRESSION OF A REFRIGERANT, EXPANDING SAID COMPRESSED REFRIGERANT AD COOLING SAME TO A POINT BELOW THE BOILING POINT OF OXYGEN AT ABOUT ATMOSPHERIC PRESSURE, PASSING SAID COOLED REFRIGERANT IN HEAT EXCHANGE RELATION WITH AIR AND SEPARATING OXYGEN FROM SAID AIR, AND INTRODUCING SAID OXYGEN INTO SAID SYSTEM THE GAS DISCHARGED FROM SAID PRIME MOVER AND RECIRCULATING SAID COMPRESSED GAS FOR HEATING THEREOF BY SAID HOT GASEOUS WASTER PRODUCTS AS AFORESAID, AND RECIRCULATING SAID REFRIGERANT FROM SAID HEAT EXCHANGE RELATION WITH AIR, FOR COMPRESSION OF SAID REFRIGERANT AS AFORESAID.
Claim 2
Dependent Claim
132 words
A PROCESS FOR UTILIZING WASTE HEAT FROM A SYSTEM EMPLOYING OXYGEN FOR OPERATION WHICH COMPRISES OPERATWASTE PRODUCTS, PASSING SAID HOT GASEOUS WASTE PRODUCTS INTO HEAT EXCHANGE RELATION WITH A COMPRESSED GAS TO HEAT SAME, INTRODUCING SAID HOT COMPRESSED GAS INTO A PRIME MOVER FOR COMPRESSION OF A REFRIGERANT, EXPANDING SAID COMPRESSED REFRIGERANT AD COOLING SAME TO A POINT BELOW THE BOILING POINT OF OXYGEN AT ABOUT ATMOSPHERIC PRESSURE, PASSING SAID COOLED REFRIGERANT IN HEAT EXCHANGE RELATION WITH AIR AND SEPARATING OXYGEN FROM SAID AIR, AND INTRODUCING SAID OXYGEN INTO SAID SYSTEM THE GAS DISCHARGED FROM SAID PRIME MOVER AND RECIRCULATING SAID COMPRESSED GAS FOR HEATING THEREOF BY SAID HOT GASEOUS WASTER PRODUCTS AS AFORESAID, AND RECIRCULATING SAID REFRIGERANT FROM SAID HEAT EXCHANGE RELATION WITH AIR, FOR COMPRESSION OF SAID REFRIGERANT AS AFORESAID.
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |