US3752646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water swollen cellulose and blends dyed with insoluble, non-vattable anthraquinone dyed in a glycol ether solution
Assignee: Crompton and Knowles Corp
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Filing: 1971-07-30
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Granted: 1973-08-14
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Expires: 1991-07-30
Abstract
Abstract WATER SWELLABLE CELLULOSIC FIBERS, FOR EXAMPLE, COTTON, OR BLENDS OR MIXTURES THEREOF WITH SYNTHETIC FIBERS, FOR EXAMPLE, POLYESTER FIBERS, UNIFORMLY DYED TO VIOLET TO GREEN SHADES WITH ESSENTIALLY WATER INSOLUBLE, NON-VATTABLE, 1-AROLYAMINO-4-ARYLAMINOANTHRAQUINONE DYES, FOR EXAMPLE, 1-(P-NITROBENZOYL)AMINO-4-(P-N-BUTYLANILINO)ANTHRAQUINONE, SAID DYED FIBERS HAVING EXCELLENT FASTNESS TO WASHING, DRYCLEANING, CROCKING AND SUBLIMATION AND EXHIBITING A REFLECTANCE COLOR VALUE (S1) AFTER SCOUR OF AT LEAST ABOUT 2.
Inventors
- 👤 J Blackwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:11
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/42; C09B1/473; D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/6033; D06P3/6041; Y; Y10; Y10S; Y10S8/00; Y10S8/907; Y10S8/92; Y10S8/922
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |