Patent US3795480A successfully refreshed from Google Patents.
US3795480A
Expired / Lapsed
US
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Process for preparing durable-press or wash-wear fabrics which can be whitened with acidic optical brighteners
Assignee: United States Department of Agriculture
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Filing: 1972-01-24
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Granted: 1974-03-05
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Expires: 1992-01-24
Abstract
Abstract This invention consists of the preparation of durable-press fabrics with basic moieties crosslinked into the fabric. As a consequence of these basic moieties, these fabrics can now absorb acidic optical brighteners. Heretofore, crosslinked cotton fabrics showed poor absorption characteristics for acidic optical brighteners. This fabric basicity is achieved by the use of reactive alcohol additives containing amine groups such as diethanolamine, triethanolamine, monoethanolamine, and 2dimethylaminoethanol.
Inventors
- 👤 R Harper
- 👤 G Gautreaux
- 👤 E Blanchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:57
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06L; D06L4/00; D06L4/60; D06L4/664; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
11 words
The process of claim 1 wherein the alcoholic amine is monoethanolamine.
Claim 2
Dependent Claim
11 words
The process of claim 1 wherein the alcoholic amine is diethanolamine.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the alcoholic amine is triethanolamine.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the alcoholic amine is 2-dimethylethanolamine.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the acidic catalist is zinc nitrate hexahydrate.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the acidic optical brightener is of the Stilbene type.
References Cited (Backward Citations)
US2957746A
Cited
US2950553A
Cited
US3407026A
Cited
US3663159A
Cited
US3658457A
Cited
US3702230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |