US3756778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester materials dyed with styryl dyes
Assignee: AMERICAN ANILINE PRODUCTS INC US
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Filing: 1972-02-17
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Granted: 1973-09-04
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Expires: 1992-02-17
Abstract
Abstract A SERIES OF STYRYL DYES IS PROVIDED THROUGH KNOEVENAGEL SYNTHESIS OF A SUBSTITUTED BENZALDEHYDE AND A NITRILE CONTAINING AN ACTIVE METHYLENE GROUP. THE STYRYL DYES OF THE INVENTION ARE SUITABLE FOR THE COLORATION OF SYNTHETIC FABRICS AND PLASTICS. EXCELLENT DYEINGS ARE PROVIDED ON POLYETHYLENE TEREPHTHALATE OF OUTSTANDING FASTNESS CHARACTERISTICS.
Inventors
- 👤 G Genta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:23
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/16; C08J9/20; C09; C09B; C09B23/00; C09B23/14; C09B23/143
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |