US3758272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing hydrophobic textile material
Assignee: Novartis AG
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Filing: 1971-09-14
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Granted: 1973-09-11
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Expires: 1991-09-14
Abstract
Abstract IN A PROCESS FOR DYEING TEXTILE MATERIAL MADE FROM HYDROPHOBIC SYNTHETIC POLYMERS CONTAINING POLAR GROUPS, WHEREIN DYEING IS CARRIED OUT IN A HOMOGENOUS SOLUTION OF A DYESTUFF OR MIXTURE OF DYESTUFFS IN AN ORGANIC SOLVENT OR SOLVENT MIXTURE, AN IMPROVEMENT IS DISCLOSED WHICH COMPRISES DILUTING THE DYEBATH, EITHER CONTINUOUSLY OR IN PORTIONS, DURING SAID DYEING PROCESS WITH A SECOND SOLVENT OR WITH WATER WHICH MAY CONTAIN A MAXIMUM OF 30% OF ORGANIC OR INORGANIC IMPURITIES, WITHOUT PRECIPITATING THE DYESTUFF, SAID SECOND SOLVENT OR WATER BEING MISCIBLE WITH THE FIRST ORGANIC SOLVENT, SAID PROCESS BEING CHARACTERIZED BY IMPROVED DYEINGS.
Inventors
- 👤 K Datye
- 👤 B Milicevic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:14
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/90; D06P1/92; D06P1/928; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922; Y10S8/926; Y10S8/927
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |