US3051541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of vat dyeing
Assignee: EIDP Inc
•
Filing: 1960-10-25
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Granted: 1962-08-28
•
Expires: 1980-10-25
Abstract
No abstract record available.
Inventors
- 👤 Warren S Clapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:01
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A CONTINUOUS PROCESS FOR DYEING TEXTILE FABRICS WITH VAT DYES IN WHICH THE FABRIC IS FIRST PADDED WITH AN AQUEOUS DISPERSION OF THE UNREDUCED VAT DYE TO A MOISTURE CONTENT OF FROM 50% TO 100% BASED ON THE WEIGHT OF THE FABRIC AND THEN EITHER BEFOR E OR AFTER DRYING THE PIGMENT-PADDED FABRIC IS PADDED WITH A CAUSTIC ALKALI AND ALKALI METAL HYDROSULFITE REDUCING AND DEVELOPING SOLUTION, THE IMPROVEMENT WHICH COMPRISES HOLDING THE VAT DYE PIGMENT-PADDED FABRIC, PRIOR TO FURTHER PROCESSING, IN THE MOIST STATE AND UNDER NON-DRYING CONDITIONS FOR A PERIOD SUFFICIENT TO INHIBIT THE MIGRATION OF THE DYE PIGMENT IN THE FABRIC DURING SUBSEQUENT TREATMENT AND TO SUBSTANTIALLY REDUCE THE BLEEDING OF THE PIGMENT FROM THE TEXTILE IN THE REDUCING BATH, WHICH HOLDING PERIOD IS FOR FROM 1 TO 15 MINUTES.
Claim 2
Dependent Claim
134 words
IN A CONTINUOUS PROCESS FOR DYEING TEXTILE FABRICS WITH VAT DYES IN WHICH THE FABRIC IS FIRST PADDED WITH AN AQUEOUS DISPERSION OF THE UNREDUCED VAT DYE TO A MOISTURE CONTENT OF FROM 50% TO 100% BASED ON THE WEIGHT OF THE FABRIC AND THEN EITHER BEFOR E OR AFTER DRYING THE PIGMENT-PADDED FABRIC IS PADDED WITH A CAUSTIC ALKALI AND ALKALI METAL HYDROSULFITE REDUCING AND DEVELOPING SOLUTION, THE IMPROVEMENT WHICH COMPRISES HOLDING THE VAT DYE PIGMENT-PADDED FABRIC, PRIOR TO FURTHER PROCESSING, IN THE MOIST STATE AND UNDER NON-DRYING CONDITIONS FOR A PERIOD SUFFICIENT TO INHIBIT THE MIGRATION OF THE DYE PIGMENT IN THE FABRIC DURING SUBSEQUENT TREATMENT AND TO SUBSTANTIALLY REDUCE THE BLEEDING OF THE PIGMENT FROM THE TEXTILE IN THE REDUCING BATH, WHICH HOLDING PERIOD IS FOR FROM 1 TO 15 MINUTES.
References Cited (Backward Citations)
US2487197A
Cited
US2447993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |