US4517108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning composition
Assignee: Daikin Industries Ltd
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Filing: 1983-09-23
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Granted: 1985-05-14
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Expires: 2003-09-23
Abstract
Abstract A cleaning composition containing 1,1,2,2-tetrachloro-1,2-difluoroethane, 1,1,2-trichloro-1,2,2-trifluoroethane and at least one other organic solvent having a melting point of not more than 15 DEG C. and a boiling point of 40 DEG to 150 DEG C. and capable of forming an azeotrope with at least one of said 1,1,2,2-tetrachloro-1,2-difluoroethane and 1,1,2-trichloro-1,2,2-trifluoroethane.
Inventors
- 👤 Iwao Hisamoto
- 👤 Yukio Omure
- 👤 Sueyoshi Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
C; C09; C09D; C09D9/00; C09D9/005; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/504; C11D7/5059; C11D7/5068; C11D7/5077; C11D7/5081; C11D7/5086
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
91 words
A method for cleaning a surface of a material with the improvement that essentially no moisture is formed over the cleaned surface, using a composition consisting essentially of 1,1,2,2-tetrachloro-1,2-difluoroethane, 1,1,2-trichloro-1,2,2-trifluoroethane and 1 to 15% by weight of at least one other organic solvent having a melting point of not more than 15° C. and a boiling point of 40° to 150° C. and capable of forming an azeotrope with at least one of said 1,1,2,2-tetrachloro-1,2-difluoroethane and 1,1,2-trichloro 1,2,2-trifluoroethane, the ratio of 1,1,2,2-tetrachloro-1,2-difluoroethane to 1,1,2-trichloro-1,2,2-trifluoroethane being from 20:80 to 80:20 by weight.
Claim 2
Independent Claim
91 words
A method for cleaning a surface of a material with the improvement that essentially no moisture is formed over the cleaned surface, using a composition consisting essentially of 1,1,2,2-tetrachloro-1,2-difluoroethane, 1,1,2-trichloro-1,2,2-trifluoroethane and 1 to 15% by weight of at least one other organic solvent having a melting point of not more than 15° C. and a boiling point of 40° to 150° C. and capable of forming an azeotrope with at least one of said 1,1,2,2-tetrachloro-1,2-difluoroethane and 1,1,2-trichloro 1,2,2-trifluoroethane, the ratio of 1,1,2,2-tetrachloro-1,2-difluoroethane to 1,1,2-trichloro-1,2,2-trifluoroethane being from 20:80 to 80:20 by weight.
Claim 3
Dependent Claim
19 words
The method of claim 1, wherein the ratio of 1,1,2,2-tetrachloro-1,2-difluoroethane to 1,1,2-trichloro-1,2,2-trifluoroethane is from 40:60 to 70:30 by weight.
Claim 4
Dependent Claim
28 words
The method of claim 1, wherein said organic solvent is a member selected from the group consisting of ethanol, methyl propyl ketone, ethylene glycol monomethyl ether and 1,4-dioxane.
Claim 5
Dependent Claim
18 words
The method of claim 1, wherein said organic solvent is one capable of forming an azeotrope with 1,1,2,2-tetrachloro-1,2-difluoroethane.
Claim 6
Independent Claim
89 words
A method for cleaning a surface of a material with the improvement that no moisture is formed over the cleaned surface, using a composition consisting essentially of 1,1,2,2-tetrachloro-1,2-difluoroethane, 1,1,2-trichloro-1,2,2-trifluoroethane and 5 to 10% by weight of at least one other organic solvent having a melting point of not more than 25° C. and a boiling point of 40° to 150° C. and capable of forming an azeotrope with at least one of said 1,1,2,2-tetrachloro-1,2-difluoroethane and 1,1,2-trichloro-1,2,2-trifluoroethane, the ratio of 1,1,2,2-tetrachloro-1,2-difluoroethane to 1,1,2-trichloro-1,2,2-trifluoroethane being from 38:57 to 54:36 by weight.
Claim 7
Independent Claim
89 words
A method for cleaning a surface of a material with the improvement that no moisture is formed over the cleaned surface, using a composition consisting essentially of 1,1,2,2-tetrachloro-1,2-difluoroethane, 1,1,2-trichloro-1,2,2-trifluoroethane and 5 to 10% by weight of at least one other organic solvent having a melting point of not more than 25° C. and a boiling point of 40° to 150° C. and capable of forming an azeotrope with at least one of said 1,1,2,2-tetrachloro-1,2-difluoroethane and 1,1,2-trichloro-1,2,2-trifluoroethane, the ratio of 1,1,2,2-tetrachloro-1,2-difluoroethane to 1,1,2-trichloro-1,2,2-trifluoroethane being from 38:57 to 54:36 by weight.
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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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |