Patent US4912303A successfully refreshed from Google Patents.
US4056403A
Expired / Lapsed
US
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Solvent composition used to clean polyurethane foam generating equipment
Assignee: BASF Corp
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Filing: 1976-05-27
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Granted: 1977-11-01
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Expires: 1996-05-27
Abstract
Abstract A solvent composition is disclosed which comprises a halogenated hydrocarbon and a monohydric alcohol. This composition is used to clean polyurethane foam generating equipment.
Inventors
- 👤 Robert J. Cramer
- 👤 Maurice A. Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:41
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/261; C08; C08G; C08G85/00; C08G85/008; C11D7/50; C11D7/5004; C11D7/5018; C11D7/263; C11D7/28; Y; Y10; Y10S; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
In a method for cleaning polyurethane foam generating equipment which comprises purging or rinsing said equipment or a portion thereof with a solvent, the improvement of using as said solvent a composition which is comprised of a. a halogentated aliphatic hydrocarbon having 1-12 carbon atoms and containing only carbon, hydrogen, and halogen atoms in the molecule and b. an aliphatic monohydric alcohol having 1-20 carbon atoms and containing only carbon, oxygen, hydrogen and optionally halogen atoms in the molecule, the weight ratio of (a):(b) ranging from about 1:1 to about 12:1.
Claim 2
Dependent Claim
91 words
In a method for cleaning polyurethane foam generating equipment which comprises purging or rinsing said equipment or a portion thereof with a solvent, the improvement of using as said solvent a composition which is comprised of a. a halogentated aliphatic hydrocarbon having 1-12 carbon atoms and containing only carbon, hydrogen, and halogen atoms in the molecule and b. an aliphatic monohydric alcohol having 1-20 carbon atoms and containing only carbon, oxygen, hydrogen and optionally halogen atoms in the molecule, the weight ratio of (a):(b) ranging from about 1:1 to about 12:1.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said weight ratio ranges from about 3:1 to about 8:1.
Claim 4
Dependent Claim
34 words
The method of claim 1 wherein said aliphatic monohydric alcohol is selected from the group consisting of methanol, ethanol, propanol, butanol, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, and triethylene glycol monobutyl ether.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein said halogenated aliphatic hydrocarbon is methylene chloride or 1,1,1-trichloroethane.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein said aliphatic monohydric alcohol contains only carbon, oxygen, and hydrogen atoms in the molecule.
Claim 7
Dependent Claim
32 words
The method of claim 5 wherein said aliphatic monohydric alcohol is either free of ether linkages and contains 1-8 carbon atoms or contains one or more ether linkages and 6-12 carbon atoms.
Claim 8
Dependent Claim
20 words
The method of claim 6 wherein said halogenated aliphatic hydrocarbon contains 1-4 carbon atoms and at least two halogen atoms.
Claim 9
Dependent Claim
15 words
The method of claim 7 wherein said ratio ranges from about 2:1 to about 10:1.
Claim 10
Dependent Claim
15 words
The method of claim 8 wherein the halogen in said halogenated aliphatic hydrocarbon is chlorine.
Claim 11
Dependent Claim
15 words
The method of claim 9 wherein said ratio ranges from about 3:1 to about 8:1.
Claim 12
Dependent Claim
44 words
The method of claim 10 wherein said halogenated aliphatic hydrocarbon is methylene chloride or 1,1,1-trichloroethane and said aliphatic monohydric alcohol is selected from the group consisting of methanol, ethanol, propanol, butanol, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, and triethylene glycol monobutyl ether.
Claim 13
Dependent Claim
12 words
The method of claim 11 wherein said halogenated aliphatic hydrocarbon is 1,1,1-trichloroethane.
Claim 14
Dependent Claim
15 words
The method of claim 12 wherein said ratio ranges from about 3.5:1 to about 6:1.
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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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |