US2930670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten urea dyeing process
Assignee: —
•
Filing: —
•
Granted: 1960-03-29
•
Expires: 1977-03-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:34
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/649; D06P1/6491
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A PROCESS FOR DYEING ORGANIC TEXTILE MATERIALS WHICH COMPRISES IMPREGNATING THE TEXTILE MATERIAL WITH A SOLUTION OF A MIXTURE OF UREA AND AT LEAST ONE ANOTHER SUBSTANCE WHICH IS SOLUBLE IN MOLTEN UREA AND CAPABLE OF LOWERING THE MELTING POINT OF UREA, THE AMOUNT OF SAID SUBSTANCE IN THE MIXTURE BEING SUFFICIENT TO LOWER THE MELTING POINT OF THE UREA BY AT LEAST 10*C., AND WITH AN AQUEOUS SOLUTION OR DISPERSION OF AT LEAST ONE DYESTUFF WHICH IS SOLUBLE IN MOLTEN UREA AND IS SUBSTANTIVE TO THE TEXTILE MATERIAL, DRYING THE TEXTILE MATERIAL AT A TEMPERATURE BELOW THE MELTING POINT OF THE MIXTURE OF UREA AND SAID, SUBSTANCE, HEATING THE DRIED MATERIAL, IN THE ABSENCE OF STEAM TO A TEMPERATURE BETWEEN THE MELTING POINT OF THE MIXTURE OF UREA AND SAID SUBSTANCE AND 160*C. TO MELT THE MIXTURE WHEREBY THE UREA IN THE MIXTURE SERVES AS A SOLVENT FOR THE DYESTUFF, FROM WHICH SOLUTION TRANSFER OF THE DYESTUFF TO THE MATERIAL TAKES PLACE, WASHING THE DYED MATERIAL TO REMOVE THE UREA AND SAID SUBSTANCE AND AGAIN DRYING THE MATERIAL.
Claim 2
Dependent Claim
179 words
A PROCESS FOR DYEING ORGANIC TEXTILE MATERIALS WHICH COMPRISES IMPREGNATING THE TEXTILE MATERIAL WITH A SOLUTION OF A MIXTURE OF UREA AND AT LEAST ONE ANOTHER SUBSTANCE WHICH IS SOLUBLE IN MOLTEN UREA AND CAPABLE OF LOWERING THE MELTING POINT OF UREA, THE AMOUNT OF SAID SUBSTANCE IN THE MIXTURE BEING SUFFICIENT TO LOWER THE MELTING POINT OF THE UREA BY AT LEAST 10*C., AND WITH AN AQUEOUS SOLUTION OR DISPERSION OF AT LEAST ONE DYESTUFF WHICH IS SOLUBLE IN MOLTEN UREA AND IS SUBSTANTIVE TO THE TEXTILE MATERIAL, DRYING THE TEXTILE MATERIAL AT A TEMPERATURE BELOW THE MELTING POINT OF THE MIXTURE OF UREA AND SAID, SUBSTANCE, HEATING THE DRIED MATERIAL, IN THE ABSENCE OF STEAM TO A TEMPERATURE BETWEEN THE MELTING POINT OF THE MIXTURE OF UREA AND SAID SUBSTANCE AND 160*C. TO MELT THE MIXTURE WHEREBY THE UREA IN THE MIXTURE SERVES AS A SOLVENT FOR THE DYESTUFF, FROM WHICH SOLUTION TRANSFER OF THE DYESTUFF TO THE MATERIAL TAKES PLACE, WASHING THE DYED MATERIAL TO REMOVE THE UREA AND SAID SUBSTANCE AND AGAIN DRYING THE MATERIAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |