Patent US2779726A successfully refreshed from Google Patents.
US2779726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of textile fibers
Assignee: Deering Milliken Research Corp
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Filing: 1953-07-29
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Granted: 1957-01-29
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Expires: 1973-07-29
Abstract
No abstract record available.
Inventors
- 👤 Roy M Rochester
- 👤 John S Beattie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:05
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/70; D06P3/704; D06P5/00; D06P5/20; D06P5/2016; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF DYEING ACRYLIC FIBER WHICH COMPRISES SUBJECTING TO THE PASSAGE OF AN ALTERNATING ELECTRIC CURRENT AN AQUEOUS DYE BATH CONTAINING AN ACIDIC DYE AND AN AMOUNT OF A WATER-SOLUBLE CUPRIC SALT EQUAL TO ABOUT FROM 40 TO 70% BY WEIGHT OF THE DYE, AND THEREAFTER DYEING ACRYLIC FIBER IN THE DYE BATH.
Claim 2
Independent Claim
54 words
A METHOD OF DYEING ACRYLIC FIBER WHICH COMPRISES SUBJECTING TO THE PASSAGE OF AN ALTERNATING ELECTRIC CURRENT AN AQUEOUS DYE BATH CONTAINING AN ACIDIC DYE AND AN AMOUNT OF A WATER-SOLUBLE CUPRIC SALT EQUAL TO ABOUT FROM 40 TO 70% BY WEIGHT OF THE DYE, AND THEREAFTER DYEING ACRYLIC FIBER IN THE DYE BATH.
References Cited (Backward Citations)
US1333700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |