US3131855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of conserving lubricant in gas compressors
Assignee: Copeland Industrial LP
•
Filing: 1961-12-28
•
Granted: 1964-05-05
•
Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Erich J Kocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:34
CPC Classifications
F; F25; F25B; F25B31/00; F25B31/002; F25B1/00; F25B1/10; F25B2400/00; F25B2400/13; F25B2400/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
THE SYSTEM FOR MINIMIZING LUBRICATING OIL LOSS IN A MULTI-STAGE RECIPROCATING PISTON GAS COMPRESSOR HAVING AT LEAST ONE HIGH PRESSURE STAGE AND ONE LOW PRESSURE STAGE PROVIDED WITH A CRANKCASE, WHICH COMPRISES, CONDUIT MEANS INTERCONNECTING THE DISCHARGE OF SAID LOW PRESSURE STAGE WITH THE HIGH PRESSURE STAGE CRANKCASE AND CONDUIT MEANS ALSO INTERCONNECTING SAID CRANKCASE WITH THE SUCTION ZONE OF SAID LOW PRESSURE STAGE OF THE COMPRESSOR TO INDUCE THE OIL TO FLOW FROM SAID LOW PRESSURE STAGE DISCHARGE INTO THE CRANKCASE.
Claim 2
Independent Claim
82 words
THE SYSTEM FOR MINIMIZING LUBRICATING OIL LOSS IN A MULTI-STAGE RECIPROCATING PISTON GAS COMPRESSOR HAVING AT LEAST ONE HIGH PRESSURE STAGE AND ONE LOW PRESSURE STAGE PROVIDED WITH A CRANKCASE, WHICH COMPRISES, CONDUIT MEANS INTERCONNECTING THE DISCHARGE OF SAID LOW PRESSURE STAGE WITH THE HIGH PRESSURE STAGE CRANKCASE AND CONDUIT MEANS ALSO INTERCONNECTING SAID CRANKCASE WITH THE SUCTION ZONE OF SAID LOW PRESSURE STAGE OF THE COMPRESSOR TO INDUCE THE OIL TO FLOW FROM SAID LOW PRESSURE STAGE DISCHARGE INTO THE CRANKCASE.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |