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Patent US5993603A successfully refreshed from Google Patents.
US5993603A
Expired / Lapsed
US
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Transparentized paper
Assignee: CAPITAL AND EMPLOYEES Inc
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Filing: 1993-05-10
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Granted: 1999-11-30
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Expires: 2013-05-10
Abstract
Abstract Transparentized paper is prepared by impregnating a paper web with a solution of a sucrose acetate isobutyrate in a lower alcohol and removing the residual alcohol. The preferred paper is 100% cotton rag content, the preferred lower alcohol solvent contains up to 5 carbon atoms, particularly isopropanol. In production, the transparentizing solution is applied to one side of a travelling paper web, excess solution is removed by an air knife, wire wound rod or other means, and residual solvent is removed by impinging hot air on the travelling web. The sucrose acetate isobutyrate can also be applied when fluidized by heating and in the absence of a solvent. The preferred content of sucrose acetate isobutyrate residual in the paper web is from about 10% to about 50% of the paper content of the transparentized paper.
Inventors
- 👤 Robert C. Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:33
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/26; G; G03; G03G; G03G7/00; G03G7/006; G03G7/0073; D21H17/00; D21H17/03; D21H17/05; D21H17/14; D21H17/15; D21H17/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
55 words
The method of making transparentized paper which is compatible with the organic photoreceptors used on drums in xerographic machines which comprises applying a solution consisting essentially of sucrose acetate isobutyrate in a lower alcohol to a paper web and removing substantially all of the solvent so that the web is substantially free of residual solvent.
Claim 2
Independent Claim
55 words
The method of making transparentized paper which is compatible with the organic photoreceptors used on drums in xerographic machines which comprises applying a solution consisting essentially of sucrose acetate isobutyrate in a lower alcohol to a paper web and removing substantially all of the solvent so that the web is substantially free of residual solvent.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said lower alcohol solvent is isopropanol.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein the amount of sucrose acetate isobutyrate introduced into the paper web is from about 10% to about 50% by weight of the paper prior to treatment.
Claim 5
Dependent Claim
32 words
The method of claim 2 wherein the amount of sucrose acetate isobutyrate introduced into the paper web is from about 10% to about 50% by weight of the paper prior to treatment.
Claim 6
Independent Claim
83 words
The method of producing a roll of transparentized paper which is compatible with the organic photoreceptors used on drums in xerographic machines in one pass of a travelling web between a supply roll and a finished roll which comprises, applying a solution consisting essentially of sucrose acetate isobutyrate dissolved in a lower alcohol to said travelling web, removing excess of said solution from said travelling web, drying the travelling web to remove substantially all residual solvent therefrom, and rewinding the treated paper web.
Claim 7
Independent Claim
83 words
The method of producing a roll of transparentized paper which is compatible with the organic photoreceptors used on drums in xerographic machines in one pass of a travelling web between a supply roll and a finished roll which comprises, applying a solution consisting essentially of sucrose acetate isobutyrate dissolved in a lower alcohol to said travelling web, removing excess of said solution from said travelling web, drying the travelling web to remove substantially all residual solvent therefrom, and rewinding the treated paper web.
Claim 8
Dependent Claim
32 words
The method of claim 5 wherein the amount of sucrose acetate isobutyrate introduced into the paper web is from about 10% to about 50% by weight of the paper prior to treatment.
Claim 9
Dependent Claim
40 words
Transparentized paper which is compatible with the photoreceptors used on drums in xerographic machines impregnated with a solution of sucrose acetate isobutyrate in a lower alcohol with no appreciable residual content of said lower alcohol remaining in the transparentized paper.
Claim 10
Dependent Claim
40 words
Transparentized paper which is compatible with the photoreceptors used on drums in xerographic machines impregnated with a solution of sucrose acetate isobutyrate in a lower alcohol with no appreciable residual content of said lower alcohol remaining in the transparentized paper.
Claim 11
Dependent Claim
63 words
Transparentized paper which is compatible with the photoreceptors used on drums in xerographic machines impregnated with a solution of sucrose acetate isobutyrate in a lower alcohol with no appreciable residual content of said lower alcohol remaining in the transparentized paper and with the residual content of the sucrose acetate isobutyrate being from about 10% to about 50% by weight of the paper content.
Claim 12
Dependent Claim
63 words
Transparentized paper which is compatible with the photoreceptors used on drums in xerographic machines impregnated with a solution of sucrose acetate isobutyrate in a lower alcohol with no appreciable residual content of said lower alcohol remaining in the transparentized paper and with the residual content of the sucrose acetate isobutyrate being from about 10% to about 50% by weight of the paper content.
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) | 2002-11-29 | 2003-05-31 | 2003-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-29 | 2007-05-31 | 2007-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-29 | 2011-05-31 | 2011-11-30 | $7700.00 | Window Closed / Lapsed |