Patent US3285028A successfully refreshed from Google Patents.
US3285028A
Expired / Lapsed
US
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Refrigeration method
Assignee: Air Products and Chemicals Inc
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Filing: 1964-01-06
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Granted: 1966-11-15
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Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Charles L Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:50
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04284; F25J3/0429; F25B; F25B9/00; F25B9/002; F25B9/004; F25J1/00; F25J1/0002; F25J1/0005; F25J1/0007; F25J1/001; F25J1/0012; F25J1/0015; F25J1/003; F25J1/0032; F25J1/0035; F25J1/0037; F25J1/004; F25J1/0045; F25J1/02; F25J1/0203; F25J1/0208; F25J1/0228; F25J1/0235; F25J1/0236; F25J1/0243; F25J1/0257; F25J1/0262; F25J1/0264; F25J3/04151; F25J3/04187; F25J3/04218; F25J3/04224; F25J3/04278; F25J3/04296; F25J3/04309; F25J3/04333; F25J3/04351; F25J3/04357; F25J3/04375; F25J3/04393; F25J3/04406; F25J3/04412; F25J2210/00; F25J2210/06; F25J2215/00; F25J2215/40; F25J2245/00; F25J2245/40; F25J2245/90; F25J2250/00; F25J2250/30; F25J2250/42; F25J2250/50; F25J2270/00; F25J2270/02; F25J2270/12; F25J2290/00; F25J2290/34; F25J2290/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
REFRIGERATION METHOD COMPRISING PASSING COMPRESSED NORMALLY GASEOUS FLUID THROUGH A FIRST HEAT EXCHANGE ZONE AND A SECOND HEAT EXCHANGE ZONE, COOLING SAID FIRST HEAT EXCHANGE ZONE AND SAID SECOND HEAT EXCHANGE ZONE BY HEAT EXCHANGE WITH RELATIVELY COLD DIFFERENT FLUIDS, ADIABATICALLY EXPANDING SAID COMPRESSED NORMALLY GASEOUS FLUID FROM THE FIRST HEAT EXCHANGE ZONE, EXPANDING WITH THE PRODUCTION OF WORK AT LEAST A PORTION OF SAID COMPRESSED NORMALLY GASEOUS FLUID FROM THE SECOND HEAT EXCHANGE ZONE, AND RECOVERING REFRIGERATION FROM SAID WORK EXPANDED FLUID IN THE FIRST HEAT EXCHANGE ZONE.
Claim 2
Dependent Claim
89 words
REFRIGERATION METHOD COMPRISING PASSING COMPRESSED NORMALLY GASEOUS FLUID THROUGH A FIRST HEAT EXCHANGE ZONE AND A SECOND HEAT EXCHANGE ZONE, COOLING SAID FIRST HEAT EXCHANGE ZONE AND SAID SECOND HEAT EXCHANGE ZONE BY HEAT EXCHANGE WITH RELATIVELY COLD DIFFERENT FLUIDS, ADIABATICALLY EXPANDING SAID COMPRESSED NORMALLY GASEOUS FLUID FROM THE FIRST HEAT EXCHANGE ZONE, EXPANDING WITH THE PRODUCTION OF WORK AT LEAST A PORTION OF SAID COMPRESSED NORMALLY GASEOUS FLUID FROM THE SECOND HEAT EXCHANGE ZONE, AND RECOVERING REFRIGERATION FROM SAID WORK EXPANDED FLUID IN THE FIRST HEAT EXCHANGE ZONE.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |