US2928712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten urea dyeing process
Assignee: —
•
Filing: —
•
Granted: 1960-03-15
•
Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:28
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/649; D06P1/6491; D06P1/0004; D06P1/0016; D06P1/38; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/58; D06P3/60; D06P3/66; D06P3/82; D06P3/8204; D06P5/00; D06P5/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROCESS FOR DYEING ORGANIC TEXTILE MATERIALS WHICH ENDURE BAKING AT 130*C.-160*C. WHICH COMPRISES IMPREGNATING THE TEXTILE MATERIAL WITH A SOLUTION OF UREA 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 TERMPERATURE BELOW THE MELTING POINT OF THE UREA, HEATING THE DRIED MATERIAL IN THE ABSENCE OF STEAM AT A TEMPERATURE SUFFICIENT TO MELT THE UREA AND NOT HIGHER THAN 60*C. WHEREBY THE UREA IS MELTED AND SERVES AS A SOLVENT FOR THE DYESTUFF, FROM WHICH RESULTANT SOLUTION TRANSFER OF THE DYESTUFF TO THE MATERIAL TAKES PLACE, WASHING THE DYED MATERIAL TO REMOVE THE UREA AND AGAIN DRYING THE MATERIAL.
Claim 2
Dependent Claim
123 words
A PROCESS FOR DYEING ORGANIC TEXTILE MATERIALS WHICH ENDURE BAKING AT 130*C.-160*C. WHICH COMPRISES IMPREGNATING THE TEXTILE MATERIAL WITH A SOLUTION OF UREA 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 TERMPERATURE BELOW THE MELTING POINT OF THE UREA, HEATING THE DRIED MATERIAL IN THE ABSENCE OF STEAM AT A TEMPERATURE SUFFICIENT TO MELT THE UREA AND NOT HIGHER THAN 60*C. WHEREBY THE UREA IS MELTED AND SERVES AS A SOLVENT FOR THE DYESTUFF, FROM WHICH RESULTANT SOLUTION TRANSFER OF THE DYESTUFF TO THE MATERIAL TAKES PLACE, WASHING THE DYED MATERIAL TO REMOVE THE UREA 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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |