Patent US3205679A successfully refreshed from Google Patents.
US3205679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature refrigeration system having filter and absorber means
Assignee: Air Products and Chemicals Inc
•
Filing: 1961-06-27
•
Granted: 1965-09-14
•
Expires: 1981-06-27
Abstract
No abstract record available.
Inventors
- 👤 Jacob M Geist
- 👤 Brian K Woolfenden
- 👤 Zeitz Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:14
CPC Classifications
F; F25; F25B; F25B43/00; F25B31/00; F25B31/02; F25B9/00; F25B9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A CLOSED REFRIGERATION SYSTEM COMPRISING A DRY SUMP GAS COMPRESSOR INCLUDING A CYLINDER AND A PISTON RUNNING DRY IN THE CYLINDER AND MOTOR MEANS FOR RECIPROCATING THE PISTON IN THE CYLINDER, THE MOTOR MEANS BEING MOUNTED WITHIN A CHAMBER DEFINED BY A HERMETICALLY SEALED CASING INCLUDING THE CYLINDER, FILTER MEANS, ADSORBER MEANS, A LIQUEFIER, MEANS CONNECTING THE FILTER MEANS AND THE ADSORBER MEANS SERIALLY IN FLUID COMMUNICATION BETWEEN THE COMRESSOR OUTLET AND THE LIQUEFIER WITH THE FILTER MEANS BEING CONNECTED TO THE COMPRESSOR OUTLET AND THE ADSORBER MEANS BEING CONNECTED TO THE LIQUEFIER, MEANS CONNECTING THE LIQUEFIER AND THE COMPRESSOR INLET, AND
Claim 2
Dependent Claim
102 words
A CLOSED REFRIGERATION SYSTEM COMPRISING A DRY SUMP GAS COMPRESSOR INCLUDING A CYLINDER AND A PISTON RUNNING DRY IN THE CYLINDER AND MOTOR MEANS FOR RECIPROCATING THE PISTON IN THE CYLINDER, THE MOTOR MEANS BEING MOUNTED WITHIN A CHAMBER DEFINED BY A HERMETICALLY SEALED CASING INCLUDING THE CYLINDER, FILTER MEANS, ADSORBER MEANS, A LIQUEFIER, MEANS CONNECTING THE FILTER MEANS AND THE ADSORBER MEANS SERIALLY IN FLUID COMMUNICATION BETWEEN THE COMRESSOR OUTLET AND THE LIQUEFIER WITH THE FILTER MEANS BEING CONNECTED TO THE COMPRESSOR OUTLET AND THE ADSORBER MEANS BEING CONNECTED TO THE LIQUEFIER, MEANS CONNECTING THE LIQUEFIER AND THE COMPRESSOR INLET, AND
References Cited (Backward Citations)
USRE23821E
Cited
US1329348A
Cited
US2486598A
Cited
US2595738A
Cited
US2751146A
Cited
US2760356A
Cited
US2730960A
Cited
US2895303A
Cited
US2909903A
Cited
US2913609A
Cited
US2983585A
Cited
US2951944A
Cited
US2991633A
Cited
US2990699A
Cited
GB863961A
Cited
US3048021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |