Patent US2589953A successfully refreshed from Google Patents.
US2589953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of cellulosic textile materials by forming lakes of basic dyes in the fibers
Assignee: Calico Printers Association Ltd
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Filing: 1950-07-03
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Granted: 1952-03-18
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Expires: 1970-07-03
Abstract
No abstract record available.
Inventors
- 👤 Miller William Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:41
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE DYEING OF CELLULOSIC TEXTILE FIBERS, THE PROCESS WHICH COMPRISES PREPARING AN AQUEOUS MIXED SOLUTION OF A BASIC DYESTUFF AND A LAKEFORMING INORGANIC ACID WITH SUFFICIENT ALKALI PRESENT TO PRODUCE A PH WITHIN THE RANGE OF FROM 5 TO 12.5 AND TO PREVENT PRECIPITATION OF THE LAKE; THE MIXED SOLUTION BEING BUFFERED SUFFICIENTLY TO MAINTAIN THE PH WITHIN SAID RANGE DURING APPLICATION OF THE SOLUTION TO THE FIBER; APPLYING THE MIXED SOLUTION TO THE FIBER TO BE DYED AND ACIDIFYING WITH AN ACID AT LEAST AS STRONG AS FORMIC ACID TO CAUSE PRECIPITATION OF THE LAKE WITHIN THE FIBER.
Claim 2
Dependent Claim
100 words
IN THE DYEING OF CELLULOSIC TEXTILE FIBERS, THE PROCESS WHICH COMPRISES PREPARING AN AQUEOUS MIXED SOLUTION OF A BASIC DYESTUFF AND A LAKEFORMING INORGANIC ACID WITH SUFFICIENT ALKALI PRESENT TO PRODUCE A PH WITHIN THE RANGE OF FROM 5 TO 12.5 AND TO PREVENT PRECIPITATION OF THE LAKE; THE MIXED SOLUTION BEING BUFFERED SUFFICIENTLY TO MAINTAIN THE PH WITHIN SAID RANGE DURING APPLICATION OF THE SOLUTION TO THE FIBER; APPLYING THE MIXED SOLUTION TO THE FIBER TO BE DYED AND ACIDIFYING WITH AN ACID AT LEAST AS STRONG AS FORMIC ACID TO CAUSE PRECIPITATION OF THE LAKE WITHIN THE FIBER.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |