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US3561911A
Expired / Lapsed
US
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Process for the dyeing of shaped articles made of aromatic polyesters of cellulose triacetate
Assignee: Bayer AG
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Filing: 1967-12-12
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Granted: 1971-02-09
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Expires: 1987-12-12
Abstract
Abstract A PROCESS AND COMPOSITION FOR DYEING AROMATIC POLYESTERS OR CELLULOSE TRIACETATE IN AN AQUEOUS BATH WITH DISPERSE OR INGRAIN DYESTUFF WHEREIN AN IMPROVED CARRIER IS USED COMPRISING NAPHTHALENE DERIVATIVES OF THE FORMULA R1CH2OR2 WHERE R1 IS NAPHTHYL OR TETRAHYDRO NAPHTHYL WHICH MAY CONTAIN SUBSTITUENTS AND R2 IS ALKYL OR ACYL.
Inventors
- 👤 Karl Fuhr
- 👤 Hans Rudolph
- 👤 Ernst Robert Fritze
- 👤 Otto Schneider
- 👤 Walter Hees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:58
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/36; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P3/38
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |