US3579286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyalkylene polyamine thiosulfonated sulfur dye composition and dyeing therewith
Assignee: Cassella Farbwerke Mainkur AG
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Filing: 1968-08-23
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Granted: 1971-05-18
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Expires: 1988-08-23
Abstract
Abstract THIOSULFONATE FORMS OF SULFUR DYES ARE FIXED ON CELLULOSIC FIBERS BY MERELY DRYING THE FIBERS AFTER THEY HAVE BEEN IMPREGNATED WITH THE DYE AND WITH A POLYALKYLENE POLYAMIDE HAVING AT LEAST THREE PRIMARY OR SECONDARY AMINE GROUPS AND IN WHICH THE ALKYLENE GROUPS HAVE TWO TO FOUR CARBONS.
Inventors
- 👤 Christian Heid
- 👤 Willi Gunzert
- 👤 Fritz Engelhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:08
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/5264; D06P1/5278; D06P1/30; D06P1/305; D06P1/64; D06P1/642; D06P1/645; D06P3/00; D06P3/82; D06P3/8204; D06P3/8223; D06P3/8238; D06P3/8247
Claims Analysis
Total Claims: 0
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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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |