Patent US6174785B1 successfully refreshed from Google Patents.
US2807155A
Expired / Lapsed
US
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Working fluids in refrigeration apparatus
Assignee: Motors Liquidation Co
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Filing: 1956-02-02
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Granted: 1957-09-24
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Expires: 1976-02-02
Abstract
No abstract record available.
Inventors
- 👤 Victor A Williamitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:34
CPC Classifications
C; C10; C10M; C10M171/00; C10M171/008; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C10M105/00; C10M105/08; C10M105/32; C10M105/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN COMBINATION, A REFRIGERATION APPARATUS INCLUDING A COMPRESSOR, CONDENSER, AND EVAPORATOR IN REFRIGERANT FLOW RELATIONSHIP, A DIFLUOROMONOCHLOROMETHANE REFRIGERANT AND A LUBRICANT SOLUBLE IN SAID REFRIGERANT COMPRISING AN ORGANIC ESTER OF PENTAERYTHRITOL WHICH IS A REACTION PRODUCT OF MONOPENTAERYTHRITOL AND AN ORGANIC ACID SELECTED FROM THE GROUP WHEREIN THE CARBOXYL GROUP IS ATTACHED TO A RADICAL TAKEN FROM A GROUP CONSISTING ALKYL AND ARYL RADICALS HAVING AN AVERAGE OF FROM 6 TO 10 CARBON ATOMS.
Claim 2
Dependent Claim
74 words
IN COMBINATION, A REFRIGERATION APPARATUS INCLUDING A COMPRESSOR, CONDENSER, AND EVAPORATOR IN REFRIGERANT FLOW RELATIONSHIP, A DIFLUOROMONOCHLOROMETHANE REFRIGERANT AND A LUBRICANT SOLUBLE IN SAID REFRIGERANT COMPRISING AN ORGANIC ESTER OF PENTAERYTHRITOL WHICH IS A REACTION PRODUCT OF MONOPENTAERYTHRITOL AND AN ORGANIC ACID SELECTED FROM THE GROUP WHEREIN THE CARBOXYL GROUP IS ATTACHED TO A RADICAL TAKEN FROM A GROUP CONSISTING ALKYL AND ARYL RADICALS HAVING AN AVERAGE OF FROM 6 TO 10 CARBON ATOMS.
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) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |