Patent US3336762A successfully refreshed from Google Patents.
US3336762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration method and apparatus for lubricant handling
Assignee: Tri State Engineering & Sales
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Filing: 1966-03-02
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Granted: 1967-08-22
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Expires: 1986-03-02
Abstract
No abstract record available.
Inventors
- 👤 Patterson Thomas Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:17
CPC Classifications
F; F25; F25B; F25B43/00; F25B43/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE METHOD OF OPERATING A REFRIGERATION SYSTEM OF THE COMPRESSOR, CONDENSER, EVAPORATOR, CIRCUIT TYPE IN WHICH LUBRICANT USED IN THE COMPRESSOR IS SOLUBLE IN THE CIRCULATED REFRIGERANT FORMING A REFRIGERANT-LUBRICANT MIXTURE IN THE SYSTEM COMPRISING THE STEPS OF: SELECTIVELY REMOVING A DETERMINED VOLUME OF SAID REFRIGERANT-LUBRICANT MIXTURE FROM SAID EVAPORATOR; HEATING SAID DETERMINED VOLUME OF REFRIGERANT-LUBRICANT MIXTURE TO VAPORIZE AND THEREBY SEPARATE SAID REFRIGERANT FROM SAID LUBRICANT; LIQUEFYING SAID VAPORIZED REFRIGERANT SO SEPARATED; AND RETURNING SAID LIQUEFIED REFRIGERANT TO SAID CONDENSER IN SAID REFRIGERANT SYSTEM WHEREBY SAID REFRIGERANT IS CONTINUOUSLY SEPARATED FROM A DETERMINED VOLUME OF SAID REFRIGERANT-LUBRICANT MIXTURE AND SUBSTANTIALLY PURE LIQUID REFRIGERANT RETURNED TO SAID REFRIGERATION SYSTEM INDEPENDENTLY OF THE OPERATION THEREOF.
Claim 2
Independent Claim
114 words
THE METHOD OF OPERATING A REFRIGERATION SYSTEM OF THE COMPRESSOR, CONDENSER, EVAPORATOR, CIRCUIT TYPE IN WHICH LUBRICANT USED IN THE COMPRESSOR IS SOLUBLE IN THE CIRCULATED REFRIGERANT FORMING A REFRIGERANT-LUBRICANT MIXTURE IN THE SYSTEM COMPRISING THE STEPS OF: SELECTIVELY REMOVING A DETERMINED VOLUME OF SAID REFRIGERANT-LUBRICANT MIXTURE FROM SAID EVAPORATOR; HEATING SAID DETERMINED VOLUME OF REFRIGERANT-LUBRICANT MIXTURE TO VAPORIZE AND THEREBY SEPARATE SAID REFRIGERANT FROM SAID LUBRICANT; LIQUEFYING SAID VAPORIZED REFRIGERANT SO SEPARATED; AND RETURNING SAID LIQUEFIED REFRIGERANT TO SAID CONDENSER IN SAID REFRIGERANT SYSTEM WHEREBY SAID REFRIGERANT IS CONTINUOUSLY SEPARATED FROM A DETERMINED VOLUME OF SAID REFRIGERANT-LUBRICANT MIXTURE AND SUBSTANTIALLY PURE LIQUID REFRIGERANT RETURNED TO SAID REFRIGERATION SYSTEM INDEPENDENTLY OF THE OPERATION THEREOF.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |