US3553189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino-naphthol-azo-phenyl dyes
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1967-11-24
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Granted: 1971-01-05
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Expires: 1987-11-24
Abstract
Abstract CLEAR BLUISH RED REACTIVE DYES REPRESENTED BY THE FORMULA, 2-((3-(HO3S-O-CH2-CH2-SO2-),4-(R-O-)PHENYL)-N=N-), 3-(HO3S-),5,6-DI(X-),8-(Y-NH-)NAPHTH-1-OL WHEREIN R IS METHYL OR ETHYL; ONE X IS HYDROGEN AND THE OTHER X IS A SULFONIC ACID GROUP; AND Y IS AN ACETYL OR CHLOROACETHYL, OR IS A BENZOYL OR BENZENESULFONYL GROUP, THE BENZOYL OR BENZENESULFONYL MAY HAVE HALOGEN ATOMS OR ALKYLS IN THE NUCLEUS. THESE COMPOUNDS ARE SUITABLE FOR DYEING NATURAL FIBERS SUCH AS COTTON, LINEN AND WOOL, AS WELL AS FIBERS OF SYNTHETICS SUCH AS RAYON, VISCOSE, POLYVINYL ALCOHOL, AND POLYAMIDES, AND ARE CHARACTERIZED BY EXCELLENT LIGHT AND WASH FASTNESS.
Inventors
- 👤 Hiroshi Sugiyama
- 👤 Hideo Otsuka
- 👤 Masakazu Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:17
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C09B62/51; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917; Y10S8/918
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |