US3702230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of a polymer additive to improve the optical brightener absorption characteristics of durable-press fabrics
Assignee: United States Department of Agriculture
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Filing: 1971-01-07
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Granted: 1972-11-07
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Expires: 1991-01-07
Abstract
Abstract A COTTON FABRIC IS TREATED WITH A SOLUTION CONTAINING POLYVINYLPYRROLIDONE-POLYACRYLATE COPOLYMER AND A CROSSLINKING AGENT WITH SUITABLE CATALYST TO PRODUCE A DURABLE PRESS FABRIC WHICH POSSESSES THE IMPARTED DESIRABLE QUALITY OF BEING ABLE TO ABSORB OPTICAL BRIGHTENERS NORMALLY INCLUDED IN LAUNDRY DETERGENTS. A WHITE FABRIC TREATED BY THE PROCESS OF THIS INVENTION IMPROVES IN WHITENESS WITH REPEATED LAUNDERINGS. WHEN THE FORMULATION IS SUPPLEMENTED WITH LOW AMOUNTS OF POLYPROPYLENE GLYCOL AND ALKYL ETHYLENEOXIDE ALCOHOL THE PERFORMANCE OF THE TREATED GARMENT OR FABRIC IS FURTHER ENHANCED.
Inventors
- 👤 Eugene J Blanchard
- 👤 Gloria A Gautreaux
- 👤 Robert J Harper Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:14
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/356; D06M15/3562; Y; Y10; Y10S; Y10S8/00; Y10S8/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |