US3276215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant handling method and apparatus for refrigeration systems
Assignee: Individual
•
Filing: 1964-03-26
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Granted: 1966-10-04
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Expires: 1984-03-26
Abstract
No abstract record available.
Inventors
- 👤 Perry T Mcdonell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:40
CPC Classifications
F; F25; F25B; F25B31/00; F25B31/002; F25B31/004; F25B43/00; F25B43/006; F25B2400/00; F25B2400/07; F25B2400/075
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
A METHOD PROVIDING ONLY REFRIGERANT IN A GASEOUS STATE TO THE COMPRESSOR IN A REFRIGERATION SYSTEM HAVING A COMPRESSOR, A CONDENSER, AND AN EVAPORATOR, SAID METHOD COMPRISING THE STEPS OF SEPARATING REFRIGERANT IN A LIQUID STATE AND LUBRICATING OIL FROM REFRIGERANT IN A GASEOUS STATE BETWEEN THE EVAPORATOR AND THE COMPRESSOR, MOVING THE REFRIGERANT IN A LIQUID STATE OBTAINED BY SAID SEPARATION INTO THE HOT AIR EXHAUST FROM THE CONDENSER BY GRAVITY, HEATING THE REFRIGERANT IN A LIQUID STATE WITH THE HEAT OF THE HOT AIR EXHAUST FROM THE CONDENSER UNTIL SAID REFRIGERANT CHANGES FROM LIQUID STATE TO GASEOUS
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |