US3563686A
Expired / Lapsed
US
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Dyeing preparations for the manufacture of water-insoluble azo dyestuffs on textile material of aromatic polyesters of triacetyl cellulose
Assignee: Hoechst AG
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Filing: 1968-05-10
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Granted: 1971-02-16
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Expires: 1988-05-10
Abstract
Abstract DYEING PREPARATIONS FOR THE MANUFACTURE OF WATERINSOLUBLE AZO DYESTUFFS ON TEXTILE MATERIAL OF AROMATIC POLYESTERS OR TRIACETYL CELLULOSE CONSISTING OF (A) AN ARYLAMIDE OF 2,3-HYDROXYNAPHTOIC ACID, (B) AN AMINOBENZENE WHICH FURTHER CONTAINS SUBSTITUENTS OTHER THAN SULFONIC ACID OR CARBOXYLIC ACID GROUPS, (C) A WATER-SOLUBLE CONDENSATION PRODUCT OF AN AROMATIC HYDROXY COMPOUND AND AN AROMATIC W-METHANE-SULFONIC ACID, AND (D) WATER.
Inventors
- 👤 Helmut Arm
- 👤 Helmut Beutler
- 👤 Rudolf Lowenfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:10
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0079; D; D06; D06P; D06P3/00; D06P3/34; D06P3/38; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |