Patent US3606991A successfully refreshed from Google Patents.
US3606991A
Expired / Lapsed
US
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Process for preparing wash-wear and durable press cottons which will absorb optical brighteners from laundry detergents under home laundry conditions
Assignee: United States Department of Agriculture
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Filing: 1968-12-18
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Granted: 1971-09-21
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Expires: 1988-12-18
Abstract
Abstract Process for preparing a cross-linked cellulosic fabric capable of repeatedly absorbing optical brighteners from wash solution, comprising contacting the said fabric with an aqueous solution comprising a cross-linking agent, about 5-15 weight percent of an alkylpolyethylene oxide alcohol or glycol and thereafter curing the fabric.
Inventors
- 👤 Robert J Harper Jr
- 👤 Gloria A Gautreaux
- 👤 Eugene J Blanchard
- 👤 Joseph S Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:21
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
9 words
The product prepared by the process of claim 1.
Claim 2
Dependent Claim
157 words
A process for preparing a cross-linked cellulosic fabric containing an optical brightener, comprising: a. mixing, with a conventional aqueous cross-linking bath containing an acidic catalyst and a cross-linking agent having methylol groups, about from 5 to 15 weight percent of an alcoholic member selected from the group consisting of an alkylethyleneoxide alcohol and an alkylethyleneoxide glycol and in which member the alkyl group contains about from 4 to 25 carbon atoms and the ethylene oxide units consist of about from 10 to 80 weight percent of the member; b. padding a cellulosic fabric with the mixture of (a); c. curing the padded fabric from (b) to effect reaction between the methylol groups of the cross-linking agent and the alcohol groups of the alcoholic member and thereby permanently bind said alcoholic member to the cellulose of the fabric; and d. padding the cured fabric from (c) with a solution containing about 0.5 weight percent of an optical brightener.
Claim 3
Dependent Claim
9 words
The product produced by the process of claim 3.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |