US3793341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indigoid dyestuffs and colored synthetic materials therefrom
Assignee: AMERICAN ANILINE PROD INC US
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Filing: 1972-04-19
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Granted: 1974-02-19
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Expires: 1992-04-19
Abstract
Abstract SYNTHETIC MATERIALS ARE COLORED WITH A NOVEL CLASS OF COMPOUNDS WHICH ARE PREPARED IN SUBSTANTIALLY QUATITATIVE YIELDS BY THE REACTION OF AN INDIGOID COMPOUND, SUCH AS INDIGOTIN. WITH A BENZENE SULFONYL HALIDE IN A THIN FLUID MELT CONSISTING ESSENTIALLY OF ANHYDROUS ALUMINIUM HALIDE IN ADMIXTURE WITH A COMPOUND THAT GIVES A FLUID MELT AT LOW TEMPERATURES. THE COMPOUNDS ARE DYESTUFFS FOR SYNTHETIC TEXTILE MATERIALS SUCH AS POLYETHYLENE TEREPHTHALATE, AND PROVIDE DYEINGS OF IMPROVED SUBSTANTIVITY, PARTICULARLY ON POLYETHYLENE TEREPHTHALATE. THE COMPOUNDS ARE ALSO USEFUL AS PIGMENTS FOR RIGID PLASTIC SUBSTRATES.
Inventors
- 👤 G Genta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:20
CPC Classifications
C; C09; C09B; C09B7/00; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 0
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |