US3300997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil free refrigerant compressor
Assignee: Copeland Industrial LP
•
Filing: 1965-08-10
•
Granted: 1967-01-31
•
Expires: 1985-08-10
Abstract
No abstract record available.
Inventors
- 👤 Erich J Kocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:46
CPC Classifications
F; F25; F25B; F25B31/00; F25B31/002; F25B1/00; F25B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE METHOD OF COOLING THE COMPRESSION CYLINDERS AND PISTONS EXTENDING INTO THE HOUSING TOWARD THE CRANKCASE OF A REFRIGERANT COMPRESSOR OPERATING IN A GAS-LIQUID SYSTEM, WHICH COMPRISES, DRAWING GASEOUS REFRIGERANT EMPLOYED IN THE SYSTEM INTO THE COMPRESSOR HOUSING IN DIRECT HEAT EXCHANGE RELATION WITH THE COMPRESSION CYLINDERS AND TOWARD THE CRANKCASE, INTRODUCING LIQUID REFRIGERANT FROM THE SYSTEM INTO DIRECT HEAT EXCHANGE RELATION WITH THE GASEOUS REFRIGERANT WITHIN
Claim 2
Independent Claim
67 words
THE METHOD OF COOLING THE COMPRESSION CYLINDERS AND PISTONS EXTENDING INTO THE HOUSING TOWARD THE CRANKCASE OF A REFRIGERANT COMPRESSOR OPERATING IN A GAS-LIQUID SYSTEM, WHICH COMPRISES, DRAWING GASEOUS REFRIGERANT EMPLOYED IN THE SYSTEM INTO THE COMPRESSOR HOUSING IN DIRECT HEAT EXCHANGE RELATION WITH THE COMPRESSION CYLINDERS AND TOWARD THE CRANKCASE, INTRODUCING LIQUID REFRIGERANT FROM THE SYSTEM INTO DIRECT HEAT EXCHANGE RELATION WITH THE GASEOUS REFRIGERANT WITHIN
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |