US4096083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning methods and compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1976-05-24
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Granted: 1978-06-20
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Expires: 1996-05-24
Abstract
Abstract Solvent mixtures which are eminently useful for the removal of toner from items used in copying and duplicating processes consist of 1,1,2-trichloro-1,2,2-trifluoroethane, acetone and methylal.
Inventors
- 👤 John Joseph Clementson
- 👤 Leo Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:56
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5018; G; G03; G03G; G03G8/00; C11D7/22; C11D7/26; C11D7/264; C11D7/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
50 words
A method of cleaning an article contaminated with toner which comprises treating the contaminated article with a solvent composition consisting essentially of by weight of the total solvent mixture; (a) at least 80% 1,1,2-trichloro-1,2,2-trifluoroethane; (b) at least 8% but less than 15% acetone; and (c) from 0.5 to 12% methylal.
Claim 2
Independent Claim
50 words
A method of cleaning an article contaminated with toner which comprises treating the contaminated article with a solvent composition consisting essentially of by weight of the total solvent mixture; (a) at least 80% 1,1,2-trichloro-1,2,2-trifluoroethane; (b) at least 8% but less than 15% acetone; and (c) from 0.5 to 12% methylal.
Claim 3
Dependent Claim
17 words
A method as claimed in claim 1 in which the proportion of methylal is at least 2%.
Claim 4
Dependent Claim
21 words
A method as claimed in claim 2 in which the solvent composition approximates to 86% 1,1,2-trichloro-1,2,2-trifluoroethane, 11% acetone and 3% methylal.
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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |