US2580873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making two-sided fabric using sulfur acid esters of leuco vat dyes and actinic rays
Assignee: Dan River Mills Inc
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Filing: 1949-12-16
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Granted: 1952-01-01
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Expires: 1969-12-16
Abstract
No abstract record available.
Inventors
- 👤 Glenn F Womble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:53
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/28; G; G03; G03C; G03C1/00; G03C1/76; G03C1/7642
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD FOR DYEING A TEXTILE MATERIAL TO PRODUCE TWO DIFFERENT SOLID COLORS ON OPPOSITE SIDES THEREOF WHICH COMPRISES THE STEPS OF IMPREGNATING SAID TEXTILE MATERIAL WITH AN ESTER OF A LEUCO VAT DYESTUFF, EXPOSING ONE SIDE ONLY OF THE IMPREGNATED MATERIAL TO LIGHT FOR A TIME SUFFICIENT TO DEVELOP THE SOLID COLOR DYE ON THAT SIDE WITHOUT DEVELOPING THE DYE ON THE UNEXPOSED SIDE, REMOVING THE UNDEVELOPED DYE FROM THE UNEXPOSED SIDE OF SAID MATERIAL, IMPREGNATING SAID MATERIAL WITH A DIFFERENT COLOR ESTER OF A LEUCO VAT DYESTUFF, EXPOSING THE ORIGINALLY UNEXPOSED SIDE ONLY OF SAID MATERIAL TO LIGHT FOR A TIME SUFFICIENT TO DEVELOP THE SOLID COLOR DYE ON THE SIDE THEN EXPOSED, AND REMOVING THE UNDEVELOPED DYE FROM SAID MATERIAL.
Claim 2
Independent Claim
123 words
A METHOD FOR DYEING A TEXTILE MATERIAL TO PRODUCE TWO DIFFERENT SOLID COLORS ON OPPOSITE SIDES THEREOF WHICH COMPRISES THE STEPS OF IMPREGNATING SAID TEXTILE MATERIAL WITH AN ESTER OF A LEUCO VAT DYESTUFF, EXPOSING ONE SIDE ONLY OF THE IMPREGNATED MATERIAL TO LIGHT FOR A TIME SUFFICIENT TO DEVELOP THE SOLID COLOR DYE ON THAT SIDE WITHOUT DEVELOPING THE DYE ON THE UNEXPOSED SIDE, REMOVING THE UNDEVELOPED DYE FROM THE UNEXPOSED SIDE OF SAID MATERIAL, IMPREGNATING SAID MATERIAL WITH A DIFFERENT COLOR ESTER OF A LEUCO VAT DYESTUFF, EXPOSING THE ORIGINALLY UNEXPOSED SIDE ONLY OF SAID MATERIAL TO LIGHT FOR A TIME SUFFICIENT TO DEVELOP THE SOLID COLOR DYE ON THE SIDE THEN EXPOSED, AND REMOVING THE UNDEVELOPED DYE FROM SAID 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) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |