US3591327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing aromatic polyamide fibers
Assignee: Asahi Kasei Corp
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Filing: 1967-06-08
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Granted: 1971-07-06
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Expires: 1987-06-08
Abstract
Abstract AROMATIC POLYAMIDE FIBERS WHICH ARE HARDLY DYEABLE WITH COMMERCIAL DYES SUCH AS ACID DYES, METAL COMPLEX DYES, DIRECT DYES AND THE LIKE CAN READILY BE DYED WITH SUCH DYES TO GIVE A DEEP COLORED DYED PRODUCT BY TREATING THE FIBERS IN A BATH CONTAINING AS AN ACCELERATOR ONE OR MORE OF ALKYLBENZENE AND ALKYLNAPHTHALENE WHERE AT LEAST ONE HYDROGEN ATOM OF THE ALKYL MOIETY IS SUBSTITUTED WITH HALOGEN, OR DERIVATIVES THEREOF IN WHICH THE AROMATIC RING OF SAID COMPOUNDS IS SUBSTITUTED BY AN ALKYL GROUP OR A HALOGEN ATOM. THE ACCELERATOR MAY BE APPLIED BEFORE OR DURING DYEING. THE AMOUNT OF ACCELERATOR USED IN THE TREATING BATH IS 3 TO 30 G./LITER.
Inventors
- 👤 Shogo Matsuda
- 👤 Takeo Oshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:35
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/6515; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924; Y10S8/925
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |