US2499787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dyeing nylon with dilute solutions of acid dyes
Assignee: EIDP Inc
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Filing: 1946-03-04
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Granted: 1950-03-07
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Expires: 1966-03-04
Abstract
No abstract record available.
Inventors
- 👤 William H Sharkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:30
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/0004; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241; Y; Y10; Y10S; Y10S8/00; Y10S8/93; Y10S8/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS FOR OBTAINING BY DYEING WITH ACID DYESTUFF EVENLY DYED NYLON TEXTILE ARTICLES, SAID PROCESS COMPRISING IMMERSING THE NYLON ARTICLE IN AN AQUEOUS DYEBATH CONTAINING THE ACID DYESTUFF IN THE LIQUID PHASE IN A CONCENTRATION AT WHICH THE DYESTUFF IS PRESENT IN AMOUNT OF FROM 0.1 TO 50 PARTS PER MILLION BASED ON THE WEIGHT OF THE AQUEOUS MEDIUM, AND AT WHICH THE DYEBATH IS WITHOUT APPRECIABLE VISUAL COLOR, ADDING TO THE DYEBATH DURING THE DYEING A DILUTE SOLUTION OF THE ACID DYESTUFF AT A RATE WHICH IS LESS THAN THE RATE OF ABSORPTION OF THE DYESTUFF BY THE NYLON, AND WHICH MAINTAINS THE DYEBATH THROUGHOUT THE DYEING WITHOUT APPRECIABLE VISUAL COLOR, AND CONTINUING THE ADDITION OF THE DYE SOLUTION AT SAID RATE UNITL THE DESIRED DEPTH OF SHADE IN THE NYLON ARTICLE IS OBTAINED.
Claim 2
Dependent Claim
136 words
A PROCESS FOR OBTAINING BY DYEING WITH ACID DYESTUFF EVENLY DYED NYLON TEXTILE ARTICLES, SAID PROCESS COMPRISING IMMERSING THE NYLON ARTICLE IN AN AQUEOUS DYEBATH CONTAINING THE ACID DYESTUFF IN THE LIQUID PHASE IN A CONCENTRATION AT WHICH THE DYESTUFF IS PRESENT IN AMOUNT OF FROM 0.1 TO 50 PARTS PER MILLION BASED ON THE WEIGHT OF THE AQUEOUS MEDIUM, AND AT WHICH THE DYEBATH IS WITHOUT APPRECIABLE VISUAL COLOR, ADDING TO THE DYEBATH DURING THE DYEING A DILUTE SOLUTION OF THE ACID DYESTUFF AT A RATE WHICH IS LESS THAN THE RATE OF ABSORPTION OF THE DYESTUFF BY THE NYLON, AND WHICH MAINTAINS THE DYEBATH THROUGHOUT THE DYEING WITHOUT APPRECIABLE VISUAL COLOR, AND CONTINUING THE ADDITION OF THE DYE SOLUTION AT SAID RATE UNITL THE DESIRED DEPTH OF SHADE IN THE NYLON ARTICLE IS OBTAINED.
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) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |