US5750046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant system lubricant and method
Assignee: Individual
•
Filing: 1997-05-27
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Granted: 1998-05-12
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Expires: 2017-05-27
Abstract
Abstract A method of maintaining and servicing air conditioning systems and compositions therefor are provided whereby newer, more environmentally friendly R-134a refrigerant gas is substituted for the older R-12 and R-22 types. In addition, a method of flushing and internal lubrication of the system is presented, along with a new flush solvent and a new lubricant composition for use with an R-134a refrigerant gas.
Inventors
- 👤 William B. Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:50
CPC Classifications
C; C10; C10M; C10M171/00; C10M171/008; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C10M105/00; C10M105/08; C10M105/32; C10M105/34; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M145/00; C10M145/18; C10M145/24; C10M145/26; C10M145/34; C10M145/36; C10M145/38; C10M153/00; C10M153/04; C10M169/00; C10M169/04; C10M169/041; C09K2205/00; C09K2205/24; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/2815; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/2845; C10M2207/286; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10M2225/00; C10M2225/02; C10M2225/04; C10M2225/041; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; F; F25; F25B; F25B2400/00; F25B2400/18
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
A method of changing the refrigerant gas in a refrigerant system comprising the steps of: (a) removing the old refrigerant gas from the system; (b) introducing a flush solvent to the refrigerant system comprising a butyl oleate composition; (c) moving the flush solvent through the refrigerant system; (d) adding a lubricant to the refrigerant system; and (e) adding a new refrigerant gas to the refrigerant system.
Claim 2
Independent Claim
66 words
A method of changing the refrigerant gas in a refrigerant system comprising the steps of: (a) removing the old refrigerant gas from the system; (b) introducing a flush solvent to the refrigerant system comprising a butyl oleate composition; (c) moving the flush solvent through the refrigerant system; (d) adding a lubricant to the refrigerant system; and (e) adding a new refrigerant gas to the refrigerant system.
Claim 3
Dependent Claim
19 words
The method of claim 1, wherein adding a lubricant comprises adding a butyl oleate composition which includes ethylene oxide.
Claim 4
Dependent Claim
16 words
The method of claim 1, wherein adding a new refrigerant gas comprises adding R-134a refrigerant gas.
Claim 5
Dependent Claim
18 words
The method of claim 1, wherein adding a lubricant comprises adding a butyl oleate and butyl stearate composition.
Claim 6
Dependent Claim
37 words
The method of claim 1, wherein introducing a flush solvent comprises introducing a flush solvent comprising by weight: 75% butyl oleate; 121/2% ethoxylated polyoxypropylene; 10% ethyoxylated phosphated alcohol ester; and 21/2% surfactant blended into a homogeneous mixture.
Claim 7
Dependent Claim
40 words
The method of claim 1, wherein introducing a flush solvent comprises introducing a flush solvent comprising by weight: 75% butyl oleate; 121/2% ethoxylated polyoxypropylene; 10% ethyoxylated phosphated alcohol ester; and 21/2% nonylphenol polyethylene glycol ether blended into a homogeneous mixture.
Claim 8
Dependent Claim
44 words
The method of claim 1, wherein introducing a flush solvent comprises the step of introducing a flush solvent comprising by weight: 75% butyl oleate; 121/2% ethoxylated polyoxypropylene having a molecular weight of 2000; 10% ethyoxylated phosphated alcohol ester; and 21/2% nonylphenol polyethylene glycol ether.
Claim 9
Dependent Claim
30 words
A flush solvent for an air conditioner system comprising by weight: 75% butyl oleate; 121/2% ethoxylated polyoxypropylene; 10% ethyoxylated phosphated alcohol ester; and 21/2% surfactant blended into a homogeneous mixture.
Claim 10
Dependent Claim
30 words
A flush solvent for an air conditioner system comprising by weight: 75% butyl oleate; 121/2% ethoxylated polyoxypropylene; 10% ethyoxylated phosphated alcohol ester; and 21/2% surfactant blended into a homogeneous mixture.
Claim 11
Dependent Claim
15 words
The flush solvent of claim 8, wherein said surfactant comprises a nonylphenol polyethylene glycol ether.
Claim 12
Dependent Claim
16 words
The flush solvent of claim 8, wherein said ethoxylated polyoxypropylene has a molecular weight of 2000.
Claim 13
Dependent Claim
27 words
A lubricant composition comprising by weight: 221/2% butyl oleate; 221/2% butyl stearate; 35% ethoxylated castor oil; 15% ethoxylated polyoxypropylene; and 5% surfactant blended into a homogeneous mixture.
Claim 14
Dependent Claim
27 words
A lubricant composition comprising by weight: 221/2% butyl oleate; 221/2% butyl stearate; 35% ethoxylated castor oil; 15% ethoxylated polyoxypropylene; and 5% surfactant blended into a homogeneous mixture.
Claim 15
Dependent Claim
15 words
The lubricant composition of claim 11 wherein said surfactant comprises an ethoxylated phosphated alcohol ester.
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) | 2001-05-11 | 2001-11-10 | 2002-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-11 | 2005-11-10 | 2006-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-11 | 2009-11-10 | 2010-05-12 | $7700.00 | Window Closed / Lapsed |