US3762860A
Expired / Lapsed
US
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Foam dyeing process
Assignee: Dexter Chemical Corp
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Filing: 1971-05-27
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Granted: 1973-10-02
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Expires: 1991-05-27
Abstract
Abstract A process for dyeing polyester acrylic and polyamide fibers is shown. A fabric is padded with a foam formed from an aqueous solution of a dyestuff, a foaming agent and a carrier for the dyestuff and the padded fabric is maintained at elevated temperatures to fix the dye. The advantages of the process include improved dye prefixation, improved migration of the dye into the fiber, higher color yields in the fabric even after relatively short dyeing times and improved dimensional stability of the dyed fabrics.
Inventors
- 👤 D Abrahams
- 👤 A Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:26
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06B; D06B19/00; D06B19/0088; D06B19/0094; D06P1/96; D06P1/965; D06P3/00; D06P3/34; D06P3/52; D06P3/522; D06P3/54; Y; Y10; Y10S; Y10S68/00; Y10S68/90; Y10S8/00; Y10S8/908; Y10S8/909; Y10S8/92; Y10S8/922; Y10S8/924
Claims Analysis
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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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |