US4046533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration working fluid containing branched chain alkylbenzene lubricant
Assignee: Chevron USA Inc
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Filing: 1976-01-26
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Granted: 1977-09-06
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Expires: 1996-01-26
Abstract
Abstract Refrigeration apparatus containing working fluid consisting essentially of refrigerant and lubricant, said refrigerant being halo-substituted hydrocarbon of 1 to 3 carbon atoms and at least 40% by weight fluorine and said lubricant being mixed branched chain alkylbenzenes having an average molecular weight in the range of from about 300 to about 470, said alkylbenzenes being produced by HF alkylation of benzenes with mixed polypropylenes.
Inventors
- 👤 Sven A. Olund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:40
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/002; C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C10; C10M; C10M171/00; C10M171/008; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/025; C10M2207/026; C10M2207/04; C10M2207/042; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2215/00; C10M2215/14; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
In a refrigeration apparatus containing a working fluid consisting essentially of a refrigerant and a chemically inert, wax-free lubricant, said refrigerant being a halo-substituted hydrocarbon having from 1 to 3 carbon atoms and at least about 40% by weight of fluorine and said lubricant being an alkylbenzene, the improvement which comprises using as a lubricant a mixture of mono-substituted, branched chain alkylbenzenes having an average molecular weight in the range of about 300 to about 470, the alkyl groups of said alkylbenzenes being at least about 60% by weight polypropylene and having an average of at least 1 branch for every 4 carbons in the alkyl group, there being from 10 to 100 parts by weight of refrigerant per part by weight of lubricant and said polypropylene alkylbenzene mixture being produced by HF alkylation of benzene with mixed polypropylenes.
Claim 2
Dependent Claim
139 words
In a refrigeration apparatus containing a working fluid consisting essentially of a refrigerant and a chemically inert, wax-free lubricant, said refrigerant being a halo-substituted hydrocarbon having from 1 to 3 carbon atoms and at least about 40% by weight of fluorine and said lubricant being an alkylbenzene, the improvement which comprises using as a lubricant a mixture of mono-substituted, branched chain alkylbenzenes having an average molecular weight in the range of about 300 to about 470, the alkyl groups of said alkylbenzenes being at least about 60% by weight polypropylene and having an average of at least 1 branch for every 4 carbons in the alkyl group, there being from 10 to 100 parts by weight of refrigerant per part by weight of lubricant and said polypropylene alkylbenzene mixture being produced by HF alkylation of benzene with mixed polypropylenes.
Claim 3
Dependent Claim
18 words
Improved refrigeration apparatus in accordance with claim 1 in which the refrigerant has 1 or 2 carbon atoms.
Claim 4
Dependent Claim
126 words
A refrigeration working fluid consisting essentially of a refrigerant and a chemically inert, wax-free lubricant, said refrigerant being a halo-substituted hydrocarbon having from 1 to 3 carbon atoms and at least about 40% by weight of fluorine and said lubricant being a mixture of mono-substituted branched chain alkylbenzenes having an average molecular weight in the range of about 300 to about 470, the alkyl groups of said alkylbenzenes being at least about 60% by weight polypropylene and having an average of at least one branch for every 4 carbon atoms in the alkyl groups, there being from 10 to 100 parts by weight of refrigerant per part by weight of lubricant and said polypropylene alkylbenzene mixture being produced by HF alkylation of benzene with mixed polypropylenes.
Claim 5
Dependent Claim
126 words
A refrigeration working fluid consisting essentially of a refrigerant and a chemically inert, wax-free lubricant, said refrigerant being a halo-substituted hydrocarbon having from 1 to 3 carbon atoms and at least about 40% by weight of fluorine and said lubricant being a mixture of mono-substituted branched chain alkylbenzenes having an average molecular weight in the range of about 300 to about 470, the alkyl groups of said alkylbenzenes being at least about 60% by weight polypropylene and having an average of at least one branch for every 4 carbon atoms in the alkyl groups, there being from 10 to 100 parts by weight of refrigerant per part by weight of lubricant and said polypropylene alkylbenzene mixture being produced by HF alkylation of benzene with mixed polypropylenes.
Claim 6
Dependent Claim
18 words
Refrigeration working fluid in accordance with claim 3 in which the refrigerant has 1 or 2 carbon atoms.
References Cited (Backward Citations)
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US3092981A
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US3478113A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |